This page has only limited features, please log in for full access.

Unclaimed
Galder Kortaberria
“Materials +Technologies” Research Group (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering, Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastián, Spain

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 20 July 2021 in Environments
Reads 0
Downloads 0

The physical-chemical characterization of plastic litter from the marine environment requires the prior removal of the biofouling attached to their surface without causing any degradation in the polymer. The absence of a standardized protocol for digesting biofouling and organic matter of both macro and microplastic samples extracted from seawater has been the main motivation for this research work, which aims to evaluate the effectiveness of different solvents (hydrogen peroxide, ethanol, a commercial enzymatic detergent, and potassium hydroxide) for the digestion of organic matter and biofouling in different samples recovered from the Spanish Atlantic and Mediterranean coast. Moreover, the potential effect of those solvents on the physical-chemical structure of polymers, four virgin plastic reference materials (low-density polyethylene, polyamide, poly(ethylene terephthalate) and polystyrene) without any type of prior degradation has been characterized in terms of Fourier transform infrared spectroscopy (FTIR) and optical microscopy. Results indicate that the hydrogen peroxide at 15% concentration applied for one week at 40 °C is the most effective solvent for organic matter and biofouling removal, without causing any apparent damage on the structure of plastic samples analyzed.

ACS Style

Amaia Mendoza; Galder Kortaberria; Florencio Marzo; Ugo Mayor; Oihane Basurko; Cristina Peña-Rodriguez. Solvent-Based Elimination of Organic Matter from Marine-Collected Plastics. Environments 2021, 8, 68 .

AMA Style

Amaia Mendoza, Galder Kortaberria, Florencio Marzo, Ugo Mayor, Oihane Basurko, Cristina Peña-Rodriguez. Solvent-Based Elimination of Organic Matter from Marine-Collected Plastics. Environments. 2021; 8 (7):68.

Chicago/Turabian Style

Amaia Mendoza; Galder Kortaberria; Florencio Marzo; Ugo Mayor; Oihane Basurko; Cristina Peña-Rodriguez. 2021. "Solvent-Based Elimination of Organic Matter from Marine-Collected Plastics." Environments 8, no. 7: 68.

Journal article
Published: 20 January 2021 in Polymers
Reads 0
Downloads 0

In this work, polymethacrylates containing sulfonyl and nitrile functional groups were successfully prepared by conventional radical polymerization and reversible addition-fragmentation chain-transfer polymerization (RAFT). The thermal and dielectric properties were evaluated, for the first time, considering differences in their molecular weights and dispersity values. Variations of the aforementioned properties do not seem to substantially affect the polarized state of these materials, defined in terms of the parameters ε’r, ε”r and tan (δ). However, the earlier appearance of dissipative phenomena on the temperature scale for materials with lower molecular weights or broader molecular weight distributions, narrows the range of working temperatures in which they exhibit high dielectric constants along with low loss factors. Notwithstanding the above, as all polymers showed, at room temperature, ε’r values above 9 and loss factors below 0.02, presenting higher dielectric performance when compared to conventional polymer materials, they could be considered as good candidates for energy storage applications.

ACS Style

Sebastian Bonardd; Cesar Saldías; Ángel Leiva; David Díaz Díaz; Galder Kortaberria. Molecular Weight Enables Fine-Tuning the Thermal and Dielectric Properties of Polymethacrylates Bearing Sulfonyl and Nitrile Groups as Dipolar Entities. Polymers 2021, 13, 317 .

AMA Style

Sebastian Bonardd, Cesar Saldías, Ángel Leiva, David Díaz Díaz, Galder Kortaberria. Molecular Weight Enables Fine-Tuning the Thermal and Dielectric Properties of Polymethacrylates Bearing Sulfonyl and Nitrile Groups as Dipolar Entities. Polymers. 2021; 13 (3):317.

Chicago/Turabian Style

Sebastian Bonardd; Cesar Saldías; Ángel Leiva; David Díaz Díaz; Galder Kortaberria. 2021. "Molecular Weight Enables Fine-Tuning the Thermal and Dielectric Properties of Polymethacrylates Bearing Sulfonyl and Nitrile Groups as Dipolar Entities." Polymers 13, no. 3: 317.

Journal article
Published: 29 July 2020 in Carbohydrate Polymers
Reads 0
Downloads 0

Biobased tractable films consisting of blends of chitosan (CS) with polymer bearing carbazole derivatives as pendant groups and fluorene-thiophene as donor-acceptor units (referred to as DA) were prepared, and their optical, morphological and photocatalytic properties were studied. DA was dissolved in tetrahydrofuran (THF) and mixed with an acidified aqueous solution containing chitosan to obtain chitosan/DA (CS/DA) films by solution casting. The fabricated biobased films were characterized using spectroscopic techniques (FT-IR and UV–visible), thermogravimetry, mechanical assays, contact angle analysis, and atomic force microscopy (AFM). The effects of varying DA compositions and the results of exposure to visible-light irradiation of the films were also analyzed. The results indicated the existence of interactions between chitosan and DA and a potentially profitable light-driven response of these biobased films. This behavior was reflected in the optical, topographical, and contact angle properties of the films, which exhibited different characteristics before and after visible-light exposure. Finally, the photocatalytic performance of the biobased films was tested via the decomposition of methyl orange (MO), as a reaction model system. Our results revealed a significant photocatalytic activity (according to biobased film composition, approximately 64% and 87% of methyl orange were degraded under continuous visible-light irradiation for 120 minutes) of the films which is attributed to the combined presence and synergetic effects of the film-forming ability of chitosan and the photoproperties of DA.

ACS Style

I. Jessop; J. Albornoz; O. Ramírez; B. Durán; L. Molero; S. Bonardd; Galder Kortaberria; D. Diaz Diaz; A. Leiva; C. Saldías. Optical, morphological and photocatalytic properties of biobased tractable films of chitosan/donor-acceptor polymer blends. Carbohydrate Polymers 2020, 249, 116822 .

AMA Style

I. Jessop, J. Albornoz, O. Ramírez, B. Durán, L. Molero, S. Bonardd, Galder Kortaberria, D. Diaz Diaz, A. Leiva, C. Saldías. Optical, morphological and photocatalytic properties of biobased tractable films of chitosan/donor-acceptor polymer blends. Carbohydrate Polymers. 2020; 249 ():116822.

Chicago/Turabian Style

I. Jessop; J. Albornoz; O. Ramírez; B. Durán; L. Molero; S. Bonardd; Galder Kortaberria; D. Diaz Diaz; A. Leiva; C. Saldías. 2020. "Optical, morphological and photocatalytic properties of biobased tractable films of chitosan/donor-acceptor polymer blends." Carbohydrate Polymers 249, no. : 116822.

Journal article
Published: 21 July 2020 in Polymer
Reads 0
Downloads 0

This work introduces, for the first time, the dipolar glass copolymer concept as a new strategy to develop polymer dielectrics. Methacrylic monomers containing sulfone and nitrile groups were copolymerized with N-vinyl-2-pyrrolidone, achieving the preparation of 9 new copolymers with higher dielectric properties than conventional polymer dielectrics. These copolymers, besides exhibiting dielectric constant values between 5.3 and 8.2 and dissipation factors below 0.022, compared to their respective poly(methacrylate) homopolymers, exhibit higher Tg values allowing to delay, on the temperature scale, the occurrence of highly dissipative phenomena (e.g. α relaxation and ionic conductivity). Therefore, these new dipolar glass copolymers can be considered as polymers with high dielectric constants, reasonably low loss values and broader working temperature ranges than conventional polymers dielectrics. Finally, results presented in this work reveal the significant effect that dipolar interactions within the material could have on the dielectric properties of these systems, opening a new research line based on the design of new dipolar glass copolymers with outstanding dielectric performance.

ACS Style

Sebastian Bonardd; Ángel Alegría; Cesar Saldías; Ángel Leiva; Galder Kortaberria. Increasing the temperature range of dipolar glass polymers through copolymerization: A first approach to dipolar glass copolymers. Polymer 2020, 203, 122765 .

AMA Style

Sebastian Bonardd, Ángel Alegría, Cesar Saldías, Ángel Leiva, Galder Kortaberria. Increasing the temperature range of dipolar glass polymers through copolymerization: A first approach to dipolar glass copolymers. Polymer. 2020; 203 ():122765.

Chicago/Turabian Style

Sebastian Bonardd; Ángel Alegría; Cesar Saldías; Ángel Leiva; Galder Kortaberria. 2020. "Increasing the temperature range of dipolar glass polymers through copolymerization: A first approach to dipolar glass copolymers." Polymer 203, no. : 122765.

Research article
Published: 18 February 2020 in ACS Applied Materials & Interfaces
Reads 0
Downloads 0

Conductive and flexible bio-based materials consisting of chitosan films coated with conductive poly(3-hexylthiophene) (P3HT), were prepared. Thermal, optical, mechanical, morphological, wettability and conductive properties were analyzed. In a very simple and effective method of chitosan films modification, a controlled volume of a P3HT solution was deposited onto a previously formed chitosan film, assisted by the spin-coating method. Later, P3HT-coated chitosan films were doped by simple contact with an aqueous solution of HAuCl4. The use of HAuCl4 results attractive because the reports on doping process in this type of materials using this reagent are still scarce and recent to date. In addition, since this acid is a well-known metal nanoparticle precursor, its use opens new future perspectives for these materials into new applications. The effect of P3HT concentration and doping times on films properties were studied. Attenuated total reflectance spectroscopy (ATR) and UV-Vis spectroscopy (UV-Vis) allowed to demonstrate that the presence of the P3HT coating and its doping induce significant changes in the vibrational modes and optoelectronic properties of samples. Additionally, the images obtained by scanning electron microscopy (SEM) showed a well-distributed and homogeneous coating on the surface of chitosan films. Measured conductivity values of doped film samples fall in the range from 821.3 to 2017.4 S/m, representing, to the best of our knowledge, the highest values reported in the literature for chitosan/chitin-based materials. Indeed, these values are around or even higher than those obtained for some materials purely consisting on conductive polymers.

ACS Style

Sebastian Bonardd; Natalia Morales; Loïk Gence; Cesar Saldias; Felipe A. Angel; Galder Kortaberria; Angel Leiva. Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic. ACS Applied Materials & Interfaces 2020, 12, 13275 -13286.

AMA Style

Sebastian Bonardd, Natalia Morales, Loïk Gence, Cesar Saldias, Felipe A. Angel, Galder Kortaberria, Angel Leiva. Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic. ACS Applied Materials & Interfaces. 2020; 12 (11):13275-13286.

Chicago/Turabian Style

Sebastian Bonardd; Natalia Morales; Loïk Gence; Cesar Saldias; Felipe A. Angel; Galder Kortaberria; Angel Leiva. 2020. "Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic." ACS Applied Materials & Interfaces 12, no. 11: 13275-13286.

Research article
Published: 06 February 2020 in The Journal of Physical Chemistry C
Reads 0
Downloads 0

In this research work γ-Fe2O3 nanoparticle addition effect on final properties of citric acid- crosslinked poly(vinyl alcohol) was studied. It was observed that citric acid, besides working as crosslinking agent for poly(vinyl alcohol), also acted as dispersant agent for γ-Fe2O3 nanoparticles. This double role of citric acid has been proved to be very useful for preparing magnetically responsive nanocomposites with a proper filler dispersion. Infrared spectroscopy and thermogravimetric analysis showed that nanoparticle addition affected the chemical structure of crosslinked poly(vinyl alcohol), while swelling test demonstrated that for the highest 8 wt% nanoparticle content studied, crosslinking degree remarkably decreased, as it was corroborated by dielectric relaxation spectroscopy. Mechanical properties were improved by crosslinking with citric acid, and results obtained for nanocomposites reflected the reinforcing effect of γ-Fe2O3 nanoparticles together with that on diminishing crosslinking degree for highest nanoparticle content. Finally, γ-Fe2O3 nanoparticles transferred their magnetic properties to studied nanocomposites leading to hybrid materials with response to magnetic fields.

ACS Style

Irati Barandiaran; Junkal Gutierrez; Agnieszka Tercjak; Galder Kortaberria. Effect of γ-Fe2O3 Nanoparticles on the Cross-Linking and Final Properties of PVA/Citric Acid-Based Nanocomposites. The Journal of Physical Chemistry C 2020, 124, 5444 -5451.

AMA Style

Irati Barandiaran, Junkal Gutierrez, Agnieszka Tercjak, Galder Kortaberria. Effect of γ-Fe2O3 Nanoparticles on the Cross-Linking and Final Properties of PVA/Citric Acid-Based Nanocomposites. The Journal of Physical Chemistry C. 2020; 124 (9):5444-5451.

Chicago/Turabian Style

Irati Barandiaran; Junkal Gutierrez; Agnieszka Tercjak; Galder Kortaberria. 2020. "Effect of γ-Fe2O3 Nanoparticles on the Cross-Linking and Final Properties of PVA/Citric Acid-Based Nanocomposites." The Journal of Physical Chemistry C 124, no. 9: 5444-5451.

Journal article
Published: 19 December 2019 in EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria
Reads 0
Downloads 0

Azken hamarkada arte ez gara itsas ingurumenean mikro-plastikoen (MPen) presentziaz kontziente izan. MPak itsaso eta kostaldeetan metatzen diren eta 5 mm baino tamaina txikiagoko plastiko partikulak dira, zenbait produktu eta aplikazioetan erabilitako plastikozko material txikiak isurtzearen, edo beste objektu handiago batzuen zatikapenaren ondorioz sortuak direnak. Beraien arriskuaren benetako zenbaterainokoa ezezaguna da eta mundu osoan zehar jatorria, presentzia eta eraginak ikertzen ari dira. Lan honek MPei buruz munduan zehar egin diren hainbat ikerketa lan bildu ditu, mundu mailan itsas konpartimentu ezberdinetan MPei dagokionez aurkitu daitekeen egoera orokorra aurkezteko helburuarekin, mugak eta ezagutze hutsuneak azpimarratuz. Itsaso-konpartimentu guztietan topatu dira MPak: ur-azalean, sedimentuetan (itsas hondoan, hondartzetan eta kostan oro har) eta biotan. MP kopuruak nabarmenki behatutako konpartimentuaren, neurketa-teknikaren, eremu geografikoaren eta, baita neurketa momentuaren arabera aldatzen dira. Ikerketak alderatzeko zailtasunak nabarmentzen dira, erabilitako metodologia ezberdinak direla medio. Hori dela eta, prozedurak bateratzeko premiazko beharra dago. Mundu mailan gehien ekoizten diren polimero motak izaki, polipropilenoa, polietilenoa eta poliestirenoa dira MPetan gehien azaltzen direnak. Ozeanoetako MPen banaketa eta eraginaren efektuei buruzko informazioa mugatua da oraindik. Guzti honengatik, egindako lana sakondu beharra dago eskala ezberdinetan (lokalean, eskualdean eta mundu mailan): metodologiak adostu, monitorizazio programak ezarri, iturriak hausnartu, MP sekundarioen degradazio mekanismoetan sakondu, eta konpartimentuen arteko dinamikak eta ingurumen zein giza osasunean eraginak aztertu.

ACS Style

Amaia Mendoza; Juan Luis Osa; Galder Kortaberria; Cristina Peña-Rodríguez; Oihane C. Basurko. Mikro-plastikoen iturriak eta egoera orokorra mundu mailako itsaso eta ozeanoetan. EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria 2019, 1 .

AMA Style

Amaia Mendoza, Juan Luis Osa, Galder Kortaberria, Cristina Peña-Rodríguez, Oihane C. Basurko. Mikro-plastikoen iturriak eta egoera orokorra mundu mailako itsaso eta ozeanoetan. EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria. 2019; ():1.

Chicago/Turabian Style

Amaia Mendoza; Juan Luis Osa; Galder Kortaberria; Cristina Peña-Rodríguez; Oihane C. Basurko. 2019. "Mikro-plastikoen iturriak eta egoera orokorra mundu mailako itsaso eta ozeanoetan." EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria , no. : 1.

Journal article
Published: 15 November 2019 in European Polymer Journal
Reads 0
Downloads 0

Biodegradable films for food packaging have received increasing attention from the industry in recent years. Due to its extraordinary properties, chitosan has demonstrated to be an exceptional candidate for that kind of applications. In this study, chitosan-based films modified with an azopolymer and silver nanoparticles were prepared by solvent-casting. The quality and homogeneity of the samples was satisfactory and films with thicknesses of the order of 25 µm and of various sizes, with diameters ranging from 5 to 15 cm, were obtained. The developed hybrid films were characterized by several experimental techniques including: atomic force microscopy, attenuated total reflectance-Fourier transformed infrared spectroscopy, thermogravimetric analysis, ultraviolet–visible spectroscopy and water contact angle measurements. In addition, the mechanical properties of the samples were investigated. Specifically, the tensile strength and the elastic modulus were enhanced in the films modified with azopolymer and silver nanoparticles. Moreover, the developed films showed reversible induced birefringence properties, indicating that they could be used for optical storage applications.

ACS Style

Raquel Fernández; Sebastian Bonardd; Itxaso Algar; Irati Barandiaran; Galder Kortaberria; Junkal Gutierrez; Agnieszka Tercjak. Photo-active chitosan-based hybrid films. European Polymer Journal 2019, 122, 109373 .

AMA Style

Raquel Fernández, Sebastian Bonardd, Itxaso Algar, Irati Barandiaran, Galder Kortaberria, Junkal Gutierrez, Agnieszka Tercjak. Photo-active chitosan-based hybrid films. European Polymer Journal. 2019; 122 ():109373.

Chicago/Turabian Style

Raquel Fernández; Sebastian Bonardd; Itxaso Algar; Irati Barandiaran; Galder Kortaberria; Junkal Gutierrez; Agnieszka Tercjak. 2019. "Photo-active chitosan-based hybrid films." European Polymer Journal 122, no. : 109373.

Article
Published: 27 August 2019 in Journal of Polymer Science
Reads 0
Downloads 0

The objective of this work is to analyze the possibility of thermomechanical recycling of polyamide 6 (PA6) from fishing nets waste. The effect of thermomechanical processing on PA yarns obtained from fishing nets waste was investigated by means of physicochemical, rheological, and thermal characterization. Infrared analysis indicated that the chemical composition of samples before and after thermomechanical recycling process was maintained, also confirmed by the thermal transitions detected by calorimetry and the presence of main peaks related to γ and α crystal phases of polyamides at X‐ray diffraction spectra. As rheological and mechanical behavior showed by all recycled samples after processing is similar to those for virgin one, PA obtained from fishing nets waste seems to be valid for recycling, as they can be processed for different potential industrial applications without any remarkable loss of main properties. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48442.

ACS Style

Gurutz Mondragon; Galder Kortaberria; Eider Mendiburu; Nekane González; Aitor Arbelaiz; Cristina Peña‐Rodriguez. Thermomechanical recycling of polyamide 6 from fishing nets waste. Journal of Polymer Science 2019, 137, 1 .

AMA Style

Gurutz Mondragon, Galder Kortaberria, Eider Mendiburu, Nekane González, Aitor Arbelaiz, Cristina Peña‐Rodriguez. Thermomechanical recycling of polyamide 6 from fishing nets waste. Journal of Polymer Science. 2019; 137 (10):1.

Chicago/Turabian Style

Gurutz Mondragon; Galder Kortaberria; Eider Mendiburu; Nekane González; Aitor Arbelaiz; Cristina Peña‐Rodriguez. 2019. "Thermomechanical recycling of polyamide 6 from fishing nets waste." Journal of Polymer Science 137, no. 10: 1.

Journal article
Published: 10 April 2019 in Reactive and Functional Polymers
Reads 0
Downloads 0

This work presents the synthesis and characterizaiton of three new poly(itaconate)s containing nitriles functional groups as high dipole moment entities and three different cycloalkyl pendant groups, in order to increase the rigidity of the system and therefore, their dipolar glass polymer temperature interval. The structural, thermal and dielectric characterization has been carried out in terms of Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS), respectively. All polymers showed good thermal properties with degradation temperatures above 250 °C, presenting higher glass transition temperatures than those of recently reported poly(itaconate)s. Regarding dielectric properties, dielectric constant values between 4.0 and 4.3 (at 25 °C and 1 kHz) and relative low loss tangent values (below 0.01) were obtained. BDS measurements showed in all cases, notorious sub-glass transitions even at temperatures below −100 °C, resulting in a broad temperature interval in which these polymers could work without high dielectric losses. Therefore, these materials seem to be good candidates for dielectric applications such as energy storage, among others.

ACS Style

Sebastian Bonardd; Ángel Alegria; Oscar Ramirez; Cesar Saldias; Ángel Leiva; Galder Kortaberria. New poly(itaconate)s with bulky pendant groups as candidates for “all-polymer” dielectrics. Reactive and Functional Polymers 2019, 140, 1 -13.

AMA Style

Sebastian Bonardd, Ángel Alegria, Oscar Ramirez, Cesar Saldias, Ángel Leiva, Galder Kortaberria. New poly(itaconate)s with bulky pendant groups as candidates for “all-polymer” dielectrics. Reactive and Functional Polymers. 2019; 140 ():1-13.

Chicago/Turabian Style

Sebastian Bonardd; Ángel Alegria; Oscar Ramirez; Cesar Saldias; Ángel Leiva; Galder Kortaberria. 2019. "New poly(itaconate)s with bulky pendant groups as candidates for “all-polymer” dielectrics." Reactive and Functional Polymers 140, no. : 1-13.

Review
Published: 13 February 2019 in Polymers
Reads 0
Downloads 0

Materials that have high dielectric constants, high energy densities and minimum dielectric losses are highly desirable for use in capacitor devices. In this sense, polymers and polymer blends have several advantages over inorganic and composite materials, such as their flexibilities, high breakdown strengths, and low dielectric losses. Moreover, the dielectric performance of a polymer depends strongly on its electronic, atomic, dipolar, ionic, and interfacial polarizations. For these reasons, chemical modification and the introduction of specific functional groups (e.g., F, CN and R−S(=O)2−R´) would improve the dielectric properties, e.g., by varying the dipolar polarization. These functional groups have been demonstrated to have large dipole moments. In this way, a high orientational polarization in the polymer can be achieved. However, the decrease in the polarization due to dielectric dissipation and the frequency dependency of the polarization are challenging tasks to date. Polymers with high glass transition temperatures (Tg) that contain permanent dipoles can help to reduce dielectric losses due to conduction phenomena related to ionic mechanisms. Additionally, sub-Tg transitions (e.g., γ and β relaxations) attributed to the free rotational motions of the dipolar entities would increase the polarization of the material, resulting in polymers with high dielectric constants and, hopefully, dielectric losses that are as low as possible. Thus, polymer materials with high glass transition temperatures and considerable contributions from the dipolar polarization mechanisms of sub-Tg transitions are known as “dipolar glass polymers”. Considering this, the main aspects of this combined strategy and the future prospects of these types of material were discussed.

ACS Style

Sebastián Bonardd; Viviana Moreno-Serna; Galder Kortaberria; David Díaz Díaz; Angel Leiva; César Saldías. Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview. Polymers 2019, 11, 317 .

AMA Style

Sebastián Bonardd, Viviana Moreno-Serna, Galder Kortaberria, David Díaz Díaz, Angel Leiva, César Saldías. Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview. Polymers. 2019; 11 (2):317.

Chicago/Turabian Style

Sebastián Bonardd; Viviana Moreno-Serna; Galder Kortaberria; David Díaz Díaz; Angel Leiva; César Saldías. 2019. "Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview." Polymers 11, no. 2: 317.

Journal article
Published: 12 February 2019 in European Polymer Journal
Reads 0
Downloads 0

This work presents the synthesis of new poly(itaconate)s containing one or two nitrile pendant groups through conventional radical polymerization. To the best of our knowledge, this is the first time in which the synthesis of poly(itaconate)s containing nitrile groups is reported in the literature. The effect of nitrile groups on the main properties is analyzed. Polymer structures were confirmed by Fourier transform infrared spectroscopy (FTIR), 1H and 13C-NMR. Molecular weights were measured by size exclusion chromatography (SEC), while thermal characterization was achieved by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Dielectric properties were measured using broadband dielectric spectroscopy at different temperatures. Polymers with one or two nitrile groups presented dielectric constant values (at 25°C and 1 kHz) of around 7 and 12.5, respectively, with relatively low dielectric losses with values below 0.02. BDS measurements showed notorious sub-glass transitions attributed to the movement of the dipolar groups under the electric field, even below -100°C, allowing to achieve dielectric constant values above the average for polymers even at extremely low temperatures. Therefore, these materials could be considered as good candidates for energy storage applications.

ACS Style

Sebastian Bonardd; Angel Alegria; Cesar Saldias; Angel Leiva-Campusano; Galder Kortaberria. Synthesis of new poly(itaconate)s containing nitrile groups as high dipolar moment entities for the development of dipolar glass polymers with increased dielectric constant. Thermal and dielectric characterization. European Polymer Journal 2019, 114, 19 -31.

AMA Style

Sebastian Bonardd, Angel Alegria, Cesar Saldias, Angel Leiva-Campusano, Galder Kortaberria. Synthesis of new poly(itaconate)s containing nitrile groups as high dipolar moment entities for the development of dipolar glass polymers with increased dielectric constant. Thermal and dielectric characterization. European Polymer Journal. 2019; 114 ():19-31.

Chicago/Turabian Style

Sebastian Bonardd; Angel Alegria; Cesar Saldias; Angel Leiva-Campusano; Galder Kortaberria. 2019. "Synthesis of new poly(itaconate)s containing nitrile groups as high dipolar moment entities for the development of dipolar glass polymers with increased dielectric constant. Thermal and dielectric characterization." European Polymer Journal 114, no. : 19-31.

Journal article
Published: 31 December 2018 in Composites Part A: Applied Science and Manufacturing
Reads 0
Downloads 0

In the present work, hybrid organic-inorganic nanocomposite films based on poly(vinyl alcohol) (PVA) and CdSe quantum dots synthesized in aqueous medium were prepared without the use of organic solvents, by casting aqueous solutions of both PVA and nanoparticles. The effect of different capping agents employed during quantum dot synthesis on thermal, optical, and dielectric properties of nanocomposites was analyzed, finding that capping agents not only affect the interactions between nanoparticles and polymeric matrix, but also the size and photoluminescence of quantum dots, among other properties. Optical, thermal, dielectric and morphological characterization of nanocomposites has been carried out in terms of UV-vis spectroscopy, spectrofluorometry, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dielectric relaxation spectroscopy (DRS) and atomic force microscopy, respectively, finding that by the use of different capping agents, final properties of nanocomposites can be tuned, as interactions between PVA and CdSe quantum dots determine their final properties.

ACS Style

Irati Barandiaran; Junkal Gutierrez; Haritz. Etxeberria; Agnieszka Tercjak; Galder Kortaberria. Tuning photoresponsive and dielectric properties of PVA/CdSe films by capping agent change. Composites Part A: Applied Science and Manufacturing 2018, 118, 194 -201.

AMA Style

Irati Barandiaran, Junkal Gutierrez, Haritz. Etxeberria, Agnieszka Tercjak, Galder Kortaberria. Tuning photoresponsive and dielectric properties of PVA/CdSe films by capping agent change. Composites Part A: Applied Science and Manufacturing. 2018; 118 ():194-201.

Chicago/Turabian Style

Irati Barandiaran; Junkal Gutierrez; Haritz. Etxeberria; Agnieszka Tercjak; Galder Kortaberria. 2018. "Tuning photoresponsive and dielectric properties of PVA/CdSe films by capping agent change." Composites Part A: Applied Science and Manufacturing 118, no. : 194-201.

Journal article
Published: 01 November 2018 in Carbohydrate Polymers
Reads 0
Downloads 0

The motivation of the present work was the preparation of bio-based thin film nanocomposites with improved dielectric properties using modified nanocellulose and chitosan, both materials known to derive from industrial waste. Cyanoethylation of cellulose nanocrystals (CNC) was achieved through a “green” method for the first time. Then, modified CNCs were incorporated into a chitosan (Chi) matrix, obtaining a homogeneous and flexible material with higher dielectric constant due to the high dipole moment of the nitrile functional group. The value of dielectric constant rises with the content of modified CNCs, from a value of 5.5 for pure chitosan at 25 °C and 1 kHz up to a value of 8.5 for the nanocomposite with 50 wt% at the same conditions. These bio-based nanocomposites show an improvement in their dielectric properties compared to pure chitosan and chitosan/unmodified CNC nanocomposites (for which dielectric constant decreases up to 4.5 at 25 °C and 1 kHz) and can be considered for high-temperature applications. Characterization of cyanoethylated cellulose nanocrystals (CN-CNC) and nanocomposites was carried out by infrared spectroscopy (FT-IR), attenuated total reflectance spectroscopy (ATR), atomic force microscopy (AFM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and solid-state NMR and broad band dielectric spectroscopy (BDS). Tensile tests were developed for mechanical characterization.

ACS Style

Sebastian Bonardd; Eduardo Robles; Irati Barandiaran; Cesar Saldias; Angel Leiva-Campusano; Galder Kortaberria. Biocomposites with increased dielectric constant based on chitosan and nitrile-modified cellulose nanocrystals. Carbohydrate Polymers 2018, 199, 20 -30.

AMA Style

Sebastian Bonardd, Eduardo Robles, Irati Barandiaran, Cesar Saldias, Angel Leiva-Campusano, Galder Kortaberria. Biocomposites with increased dielectric constant based on chitosan and nitrile-modified cellulose nanocrystals. Carbohydrate Polymers. 2018; 199 ():20-30.

Chicago/Turabian Style

Sebastian Bonardd; Eduardo Robles; Irati Barandiaran; Cesar Saldias; Angel Leiva-Campusano; Galder Kortaberria. 2018. "Biocomposites with increased dielectric constant based on chitosan and nitrile-modified cellulose nanocrystals." Carbohydrate Polymers 199, no. : 20-30.

Research article
Published: 22 October 2018 in ACS Applied Materials & Interfaces
Reads 0
Downloads 0

This work presents the synthesis of new poly(itaconate)s containing sulfone or nitrile pendant groups through conventional radical polymerization together with their characterization and comparison with poly(methacrylate)s containing identical groups. Structural and thermal characterization has been carried out in terms of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR) and thermogravimetric analysis (TGA). Characterized by broadband dielectric spectroscopy (BDS), all polymers showed dielectric constant values between 7 and 10 (at 25°C and 1 kHz) and relative low dielectric loss values (≈ 0.02). BDS measurements showed, for all the polymers analyzed, notorious sub-glass transitions even at temperatures below -100°C, resulting in a broad temperature interval in which these polymers exhibit high dielectric constant and could work without high losses. Therefore, these materials seem to be good candidates for dielectric applications such as energy storage, among others.

ACS Style

Sebastian Bonardd; Angel Alegria; Cesar Saldias; Angel Leiva; Galder Kortaberria. Polyitaconates: A New Family of “All-Polymer” Dielectrics. ACS Applied Materials & Interfaces 2018, 10, 38476 -38492.

AMA Style

Sebastian Bonardd, Angel Alegria, Cesar Saldias, Angel Leiva, Galder Kortaberria. Polyitaconates: A New Family of “All-Polymer” Dielectrics. ACS Applied Materials & Interfaces. 2018; 10 (44):38476-38492.

Chicago/Turabian Style

Sebastian Bonardd; Angel Alegria; Cesar Saldias; Angel Leiva; Galder Kortaberria. 2018. "Polyitaconates: A New Family of “All-Polymer” Dielectrics." ACS Applied Materials & Interfaces 10, no. 44: 38476-38492.

Website
Published: 01 October 2018 in Advanced Polymeric Materials for Sustainability and Innovations
Reads 0
Downloads 0
ACS Style

I. Barandiaran; Galder Kortaberria. Still Looking for the Magic Spot: Dispersing Modified Magnetic Nanoparticles into Nanostructured Block Copolymers. Advanced Polymeric Materials for Sustainability and Innovations 2018, 1 -28.

AMA Style

I. Barandiaran, Galder Kortaberria. Still Looking for the Magic Spot: Dispersing Modified Magnetic Nanoparticles into Nanostructured Block Copolymers. Advanced Polymeric Materials for Sustainability and Innovations. 2018; ():1-28.

Chicago/Turabian Style

I. Barandiaran; Galder Kortaberria. 2018. "Still Looking for the Magic Spot: Dispersing Modified Magnetic Nanoparticles into Nanostructured Block Copolymers." Advanced Polymeric Materials for Sustainability and Innovations , no. : 1-28.

Journal article
Published: 24 August 2018 in Materials
Reads 0
Downloads 0

In this work, the self-assembled morphologies obtained for poly(styrene-b-butadiene-b-styrene) (SBS) and poly(styrene-b-isoprene-b-styrene) (SIS) ABA-type copolymers were investigated before and after hydrogenation of the polydiene block, which led to poly(styrene-b-ethylene)/poly(ethylene-b-styrene) (SEES) and poly(styrene-b-ethylene)/poly(propylene-b-styrene) (SEPS) copolymers, respectively. The evaluation of different morphologies was carried out using atomic force microscopy (AFM), analyzing the effect of various parameters such as the solvent and polymer concentrations employed for film casting (toluene, cyclohexane, or tetrahydrofurane with concentrations of 1 and 3 wt%), together with that of the annealing treatment (thermal annealing at room temperature, and 60, 80, and 100 °C). The effect of these parameters in combination with the chemical nature of the polydiene block led to different morphologies with different topographic aspects affecting the roughness (Ra) of the film.

ACS Style

Nikolaos Politakos; Galder Kortaberria. Exploring the Self-Assembly Capabilities of ABA-Type SBS, SIS, and Their Analogous Hydrogenated Copolymers onto Different Nanostructures Using Atomic Force Microscopy. Materials 2018, 11, 1529 .

AMA Style

Nikolaos Politakos, Galder Kortaberria. Exploring the Self-Assembly Capabilities of ABA-Type SBS, SIS, and Their Analogous Hydrogenated Copolymers onto Different Nanostructures Using Atomic Force Microscopy. Materials. 2018; 11 (9):1529.

Chicago/Turabian Style

Nikolaos Politakos; Galder Kortaberria. 2018. "Exploring the Self-Assembly Capabilities of ABA-Type SBS, SIS, and Their Analogous Hydrogenated Copolymers onto Different Nanostructures Using Atomic Force Microscopy." Materials 11, no. 9: 1529.

Conference paper
Published: 11 July 2018 in 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology
Reads 0
Downloads 0

Block copolymers constitute an interesting platforms to host inorganic nanoparticles for obtaining new materials with advantageous properties. In this case, PS-b-PMMA block copolymer self-assembled into a lamellar nanostructure has been used to disperse magnetic Fe2O3 nanoparticles, resulting in a polymeric nanocomposite with magnetic properties. In order to obtain a good and selective dispersion of nanoparticles into the nanostructured block copolymer, the surface of nanoparticles has been modified both with a silane as a compatibilising agent or with poly(methyl methacrylate) (PMMA) brushes. Morphology of nanocomposites has been characterized by atomic force microscopy (AFM) while magnetic characterization has been carried out with a vibrating sample magnetometer (VSM).

ACS Style

Irati Barandiaran; Galder Kortaberria. Morphological and magnetic properties of PS-b-PMMA diblock copolymer based nanocomposites. 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology 2018, 1981, 020061 .

AMA Style

Irati Barandiaran, Galder Kortaberria. Morphological and magnetic properties of PS-b-PMMA diblock copolymer based nanocomposites. 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. 2018; 1981 (1):020061.

Chicago/Turabian Style

Irati Barandiaran; Galder Kortaberria. 2018. "Morphological and magnetic properties of PS-b-PMMA diblock copolymer based nanocomposites." 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology 1981, no. 1: 020061.

Journal article
Published: 17 April 2018 in EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria
Reads 0
Downloads 0

Nanokonposatu organiko/inorganikoak gizartean sortzen ari diren behar berriei erantzuteko hautagai egokiak dira, izan nanoelektronikan, fotonikan, energia- pilaketan, katalisian, estalduretan, etab. Horien artean blokezko kopolimero eta nanopartikula magnetikoetan oinarritutako nanokonposatuak dauzkagu, zeintzuek aplikazio horietarako propietate interesgarriak dituzten. Lan honetan blokezko kopolimero eta nanopartikula magnetikoz osatutako nanokonposatu film meheak aztertu dira, nanopartikulen dispertsiorako teknika desberdinak landuz eta horiek blokezko kopolimeroen nanoegituraketan duten eragina aztertuz, baita nanokonposatuei transferitutako propietate magnetikoak ere.

ACS Style

Irati Barandiaran; Galder Kortaberria. Blokezko kopolimero eta nanopartikula magnetikoetan oinarritutako nanokonposatu film meheak: nanopartikulen dispertsioaren eragina. EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria 2018, 9 -19.

AMA Style

Irati Barandiaran, Galder Kortaberria. Blokezko kopolimero eta nanopartikula magnetikoetan oinarritutako nanokonposatu film meheak: nanopartikulen dispertsioaren eragina. EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria. 2018; ():9-19.

Chicago/Turabian Style

Irati Barandiaran; Galder Kortaberria. 2018. "Blokezko kopolimero eta nanopartikula magnetikoetan oinarritutako nanokonposatu film meheak: nanopartikulen dispertsioaren eragina." EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria , no. : 9-19.

Journal article
Published: 01 February 2018 in Journal of Macromolecular Science, Part A
Reads 0
Downloads 0
ACS Style

M. Schmidt; M. Saavedra; L. Alegría; N. Alvarado; I. Fuentes; P. Menares; Galder Kortaberria; L. Gargallo; Cesar Saldias; Angel Leiva-Campusano; D. Radić. Host-guest interactions of non-steroidal anti-inflammatory drugs on the functionalized dendronized polymeric nanocomposite, Poly(N-tris[((cyano-ethoxy)methyl] methylacrylamide). Journal of Macromolecular Science, Part A 2018, 55, 296 -309.

AMA Style

M. Schmidt, M. Saavedra, L. Alegría, N. Alvarado, I. Fuentes, P. Menares, Galder Kortaberria, L. Gargallo, Cesar Saldias, Angel Leiva-Campusano, D. Radić. Host-guest interactions of non-steroidal anti-inflammatory drugs on the functionalized dendronized polymeric nanocomposite, Poly(N-tris[((cyano-ethoxy)methyl] methylacrylamide). Journal of Macromolecular Science, Part A. 2018; 55 (3):296-309.

Chicago/Turabian Style

M. Schmidt; M. Saavedra; L. Alegría; N. Alvarado; I. Fuentes; P. Menares; Galder Kortaberria; L. Gargallo; Cesar Saldias; Angel Leiva-Campusano; D. Radić. 2018. "Host-guest interactions of non-steroidal anti-inflammatory drugs on the functionalized dendronized polymeric nanocomposite, Poly(N-tris[((cyano-ethoxy)methyl] methylacrylamide)." Journal of Macromolecular Science, Part A 55, no. 3: 296-309.