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In this work, the use of ZrO2 nanocoating in aluminum substrates, generated by controlled electrochemical chronoamperometry in hexafluorozirconic acid solutions (H2ZrF6·5H2O), resulted in a lower porous films than that obtained by chemical conversion coating. After the application of an epoxy coating, long-term cyclic immersion corrosion tests and scratch tests proved the superior protection of the dual system and the coating lifespan, thanks to the enhanced adhesion of ZrO2 intermediate layer and the organic coating. As zirconium-based electrolytes are considered more friendly bath if compared to that of other conversion coating processes, like chromating, phosphating or anodizing processes, the study opens new insights to the protection of structural metals in sectors such as automotive, naval and aerospace industries. The main advantages are the employment of lightweight intermediate pre-treatment (nanoscale), compared to conventional ones (microscale), and reduction of waste slurry (electrolyte bath free of additives).
Vitor B. Moreira; Alvaro Meneguzzi; Emilio Jiménez-Piqué; Carlos Alemán; Elaine Armelin. Aluminum Protection by Using Green Zirconium Oxide Layer and Organic Coating: An Efficient and Adherent Dual System. Sustainability 2021, 13, 9688 .
AMA StyleVitor B. Moreira, Alvaro Meneguzzi, Emilio Jiménez-Piqué, Carlos Alemán, Elaine Armelin. Aluminum Protection by Using Green Zirconium Oxide Layer and Organic Coating: An Efficient and Adherent Dual System. Sustainability. 2021; 13 (17):9688.
Chicago/Turabian StyleVitor B. Moreira; Alvaro Meneguzzi; Emilio Jiménez-Piqué; Carlos Alemán; Elaine Armelin. 2021. "Aluminum Protection by Using Green Zirconium Oxide Layer and Organic Coating: An Efficient and Adherent Dual System." Sustainability 13, no. 17: 9688.
Polydopamine–ethylene glycol dimethacrylate copolymer is a biocompatible coating with cell adhesion promotion and antibiofilm properties.
Ľudmila Hodásová; Robert Quintana; Urszula Czuba; Luis J. del Valle; Gemma Fargas; Carlos Alemán; Elaine Armelin. Atmospheric pressure plasma liquid assisted deposition of polydopamine/acrylate copolymer on zirconia (Y-TZP) ceramics: a biocompatible and adherent nanofilm. RSC Advances 2021, 11, 17360 -17368.
AMA StyleĽudmila Hodásová, Robert Quintana, Urszula Czuba, Luis J. del Valle, Gemma Fargas, Carlos Alemán, Elaine Armelin. Atmospheric pressure plasma liquid assisted deposition of polydopamine/acrylate copolymer on zirconia (Y-TZP) ceramics: a biocompatible and adherent nanofilm. RSC Advances. 2021; 11 (28):17360-17368.
Chicago/Turabian StyleĽudmila Hodásová; Robert Quintana; Urszula Czuba; Luis J. del Valle; Gemma Fargas; Carlos Alemán; Elaine Armelin. 2021. "Atmospheric pressure plasma liquid assisted deposition of polydopamine/acrylate copolymer on zirconia (Y-TZP) ceramics: a biocompatible and adherent nanofilm." RSC Advances 11, no. 28: 17360-17368.
Herein, the influence of the substrate in the formation of zirconium oxide monolayer, from an aqueous hexafluorozirconic acid solution, by chemical conversion and by electro-assisted deposition, has been approached. The nanoscale dimensions of the ZrO2 film is affected by the substrate nature and roughness. This study evidenced that the mechanism of Zr-EAD is dependent on the potential applied and on the substrate composition, whereas conversion coating is uniquely dependent on the adsorption reaction time. The zirconium oxide based nanofilms were more homogenous in AA2024 substrates if compared to pure Al grade (AA1100). It was justified by the high content of Cu alloying element present in the grain boundaries of the latter. Such intermetallic active sites favor the obtaining of ZrO2 films, as demonstrated by XPS and AFM results. From a mechanistic point of view, the electrochemical reactions take place simultaneously with the conventional chemical conversion process driven by ions diffusion. Such findings will bring new perspectives for the generation of controlled oxide coatings in modified electrodes used, as for example, in the construction of battery cells; in automotive and in aerospace industries, to replace micrometric layers of zinc phosphate by light-weight zirconium oxide nanometric ones. This study is particularly addressed for the reduction of industrial waste by applying green bath solutions without the need of auxiliary compounds and using lightweight ceramic materials.
Vitor Bonamigo Moreira; Anna Puiggalí-Jou; Emilio Jiménez-Piqué; Carlos Alemán; Alvaro Meneguzzi; Elaine Armelin. Green Nanocoatings Based on the Deposition of Zirconium Oxide: The Role of the Substrate. Materials 2021, 14, 1043 .
AMA StyleVitor Bonamigo Moreira, Anna Puiggalí-Jou, Emilio Jiménez-Piqué, Carlos Alemán, Alvaro Meneguzzi, Elaine Armelin. Green Nanocoatings Based on the Deposition of Zirconium Oxide: The Role of the Substrate. Materials. 2021; 14 (4):1043.
Chicago/Turabian StyleVitor Bonamigo Moreira; Anna Puiggalí-Jou; Emilio Jiménez-Piqué; Carlos Alemán; Alvaro Meneguzzi; Elaine Armelin. 2021. "Green Nanocoatings Based on the Deposition of Zirconium Oxide: The Role of the Substrate." Materials 14, no. 4: 1043.
Herein, for the first time is described the design of a novel porous zirconia scaffolds manufactured by using polymer-infiltrated ceramic network (PICN) and 3D-printing technologies. Cubic geometry of pieces was obtained by perpendicular layer-by-layer deposition of yttrium-stabilized tetragonal zirconia polycrystal (3Y-TZP) and Pluronic® hydrogel ceramic paste. The specimens were prepared by robocasting assembly with 50% infill and 50% of pores, as feed setup. Bisphenol A glycerolate dimethacrylate (Bis-GMA) and tri(ethylenglycol) dimethacrylate (TEGDMA) copolymer, a well-known biocompatible adhesive, which is widely used in dentistry field, was employed to reinforce the pores of the 3D-printed ceramic structure. The success of the acrylate polymer infiltration above the scaffold surface and among the 3Y-TZP filaments was achieved through previous ceramic functionalization with 3-(trimethoxysilyl)propyl methacrylate (γ-MPS). The well infiltration of the material on pores was evaluated by gravimetry, obtaining a value of 87.5 ± 6.6% of pores covered by the adhesive. Such successful infiltration of methacrylate copolymer had also a positive effect on the mechanical properties of the scaffold material, being the PICN sample that one with the highest elongation resistance. The new system showed reduced bacteria proliferation, over 24 h of incubation with Gram-negative Escherichia coli and Gram-positive Streptococcus salivarius bacteria lines, when compared to the control.
L'udmila Hodásová; Jordi Sans; Brenda G. Molina; Carlos Alemán; Luis Llanes; Gemma Fargas; Elaine Armelin. Polymer infiltrated ceramic networks with biocompatible adhesive and 3D-printed highly porous scaffolds. Additive Manufacturing 2021, 39, 101850 .
AMA StyleL'udmila Hodásová, Jordi Sans, Brenda G. Molina, Carlos Alemán, Luis Llanes, Gemma Fargas, Elaine Armelin. Polymer infiltrated ceramic networks with biocompatible adhesive and 3D-printed highly porous scaffolds. Additive Manufacturing. 2021; 39 ():101850.
Chicago/Turabian StyleL'udmila Hodásová; Jordi Sans; Brenda G. Molina; Carlos Alemán; Luis Llanes; Gemma Fargas; Elaine Armelin. 2021. "Polymer infiltrated ceramic networks with biocompatible adhesive and 3D-printed highly porous scaffolds." Additive Manufacturing 39, no. : 101850.
The main aim of the present work was to approach the effect of the addition of an organic acid dopant, dodecylbenzenesulfonic acid (DBSA), in the preparation of poly(4,4-diphenylether-5,5-dibenzimidazole) (OPBI) films, commonly used as proton exchange membranes (PEMs). For this purpose, DBSA was blended with OPBI polymer matrix, at different concentrations, to evaluate the effect of such molecules in the proton conductivity of OPBI membranes. A substantial improvement in the dimensional stability of OPBI film, either for the undoped or for the phosphoric acid doped membranes, with low content of DBSA (12.5 wt.%) was achieved. Moreover, the charge mobility in OPBI/DBSA films remained stable between 22 ºC and 140 ºC, for both doped and undoped states. Therefore, the utilization of OPBI/DBSA system can be envisaged for proton exchange membrane operations at moderate temperature interval.
Amir A. Tahrim; Laura Crespo; Lourdes Franco; Carlos Alemán; Elaine Armelin. The effect of dodecylbenzenesulfonic acid molecules on poly(4,4-diphenylether-5,5-dibenzimidazole) films. Journal of Polymer Research 2020, 27, 1 -15.
AMA StyleAmir A. Tahrim, Laura Crespo, Lourdes Franco, Carlos Alemán, Elaine Armelin. The effect of dodecylbenzenesulfonic acid molecules on poly(4,4-diphenylether-5,5-dibenzimidazole) films. Journal of Polymer Research. 2020; 27 (11):1-15.
Chicago/Turabian StyleAmir A. Tahrim; Laura Crespo; Lourdes Franco; Carlos Alemán; Elaine Armelin. 2020. "The effect of dodecylbenzenesulfonic acid molecules on poly(4,4-diphenylether-5,5-dibenzimidazole) films." Journal of Polymer Research 27, no. 11: 1-15.
Vitor Bonamigo Moreira; Arjan W. Kleij; Lourdes Franco; Jordi Puiggalí; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication 2020, 1 .
AMA StyleVitor Bonamigo Moreira, Arjan W. Kleij, Lourdes Franco, Jordi Puiggalí, Alvaro Meneguzzi, Carlos Alemán, Elaine Armelin. Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication. 2020; ():1.
Chicago/Turabian StyleVitor Bonamigo Moreira; Arjan W. Kleij; Lourdes Franco; Jordi Puiggalí; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. 2020. "Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production." 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication , no. : 1.
Ludmila Hodasova; Luis J. Del Valle; Carlos Alemán; Gemma Fargas; Elaine Armelin. Biocompatibility and osseointegration properties of 3D-printed polymer infiltrated ceramic networks. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication 2020, 1 .
AMA StyleLudmila Hodasova, Luis J. Del Valle, Carlos Alemán, Gemma Fargas, Elaine Armelin. Biocompatibility and osseointegration properties of 3D-printed polymer infiltrated ceramic networks. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication. 2020; ():1.
Chicago/Turabian StyleLudmila Hodasova; Luis J. Del Valle; Carlos Alemán; Gemma Fargas; Elaine Armelin. 2020. "Biocompatibility and osseointegration properties of 3D-printed polymer infiltrated ceramic networks." 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication , no. : 1.
An electroresponsive hybrid platform for tissue engineering, based on isotactic polypropylene, poly 3,4-ethylenedioxythiophene and poly(ε-caprolactone) has been developed.
Brenda G. Molina; Anca-Dana Bendrea; Sonia Lanzalaco; Lourdes Franco; Luminita Cianga; Luis J. del Valle; Jordi Puiggali; Pau Turon; Elaine Armelin; Ioan Cianga; Carlos Aleman. Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability. Journal of Materials Chemistry B 2020, 8, 8864 -8877.
AMA StyleBrenda G. Molina, Anca-Dana Bendrea, Sonia Lanzalaco, Lourdes Franco, Luminita Cianga, Luis J. del Valle, Jordi Puiggali, Pau Turon, Elaine Armelin, Ioan Cianga, Carlos Aleman. Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability. Journal of Materials Chemistry B. 2020; 8 (38):8864-8877.
Chicago/Turabian StyleBrenda G. Molina; Anca-Dana Bendrea; Sonia Lanzalaco; Lourdes Franco; Luminita Cianga; Luis J. del Valle; Jordi Puiggali; Pau Turon; Elaine Armelin; Ioan Cianga; Carlos Aleman. 2020. "Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability." Journal of Materials Chemistry B 8, no. 38: 8864-8877.
Herein, a facile approach toward transforming a 2D polypropylene flexible mesh material into a 4D dynamic system is presented. The versatile platform, composed by a substrate of knitted fibers of isotactic polypropylene (iPP) mesh and a coating of thermosensitive poly(N ‐isopropylacrylamide‐co‐N,N’ ‐methylene bis(acrylamide) (PNIPAAm‐co ‐MBA) hydrogel, covalently bonded to the mesh surface, after cold‐plasma surface treatment and radical polymerization, is intended to undergo variations in its geometry via its reversible folding/unfolding behavior. The study is the first to trace the 3D movement of a flat surgical mesh, intended to repair hernia defects, under temperature and humidity control. An infrared thermographic camera and an optical microscope are used to evaluate the macroscopic and microscopic structure stimulus response. The presence of the PP substrate and the distribution of the gel surrounding the PP threads, affect both the PNIPAAM gel expansion/contraction as well as the time of folding/unfolding response. Furthermore, PP‐g ‐PNIPAAm meshes show an increase in the bursting strength of ≈16% with respect to the uncoated mesh, offering a strongest and adaptable system for its future implantation in human body. The findings reported offer unprecedented application possibilities in the biomedical field.
Sonia Lanzalaco; Pau Turon; Christine Weis; Christian Mata; Eulàlia Planas; Carlos Alemán; Elaine Armelin. Toward the New Generation of Surgical Meshes with 4D Response: Soft, Dynamic, and Adaptable. Advanced Functional Materials 2020, 30, 1 .
AMA StyleSonia Lanzalaco, Pau Turon, Christine Weis, Christian Mata, Eulàlia Planas, Carlos Alemán, Elaine Armelin. Toward the New Generation of Surgical Meshes with 4D Response: Soft, Dynamic, and Adaptable. Advanced Functional Materials. 2020; 30 (36):1.
Chicago/Turabian StyleSonia Lanzalaco; Pau Turon; Christine Weis; Christian Mata; Eulàlia Planas; Carlos Alemán; Elaine Armelin. 2020. "Toward the New Generation of Surgical Meshes with 4D Response: Soft, Dynamic, and Adaptable." Advanced Functional Materials 30, no. 36: 1.
Herein, a versatile bilayer system, composed by a polypropylene (PP) mesh and a covalently bonded poly(N-isopropylacrylamide) (PNIPAAm) hydrogel, is reported.
Sonia Lanzalaco; Luis Javier Del Valle; Pau Turon; Christine Weis; Francesc Estrany; Carlos Alemán; Elaine Armelin. Polypropylene mesh for hernia repair with controllable cell adhesion/de-adhesion properties. Journal of Materials Chemistry B 2020, 8, 1049 -1059.
AMA StyleSonia Lanzalaco, Luis Javier Del Valle, Pau Turon, Christine Weis, Francesc Estrany, Carlos Alemán, Elaine Armelin. Polypropylene mesh for hernia repair with controllable cell adhesion/de-adhesion properties. Journal of Materials Chemistry B. 2020; 8 (5):1049-1059.
Chicago/Turabian StyleSonia Lanzalaco; Luis Javier Del Valle; Pau Turon; Christine Weis; Francesc Estrany; Carlos Alemán; Elaine Armelin. 2020. "Polypropylene mesh for hernia repair with controllable cell adhesion/de-adhesion properties." Journal of Materials Chemistry B 8, no. 5: 1049-1059.
The corrosion behavior of cemented carbides with binders of different chemical nature (Co and Ni) and carbides with distinct mean grain size (ultrafine and coarse) was studied. The investigation also included corrosion media (acidic and neutral solutions containing chlorides and an alkaline solution) as experimental variables. Immersion tests were performed to induce corrosion damage in a controlled way. Electrochemical parameters were measured together with a detailed inspection of the corroded surfaces. Microstructural influence on the tolerance to corrosion damage was evaluated in terms of residual strength. Results pointed out that corrosion rates were lower in the alkaline solution. In contrast, acidic media led to higher corrosion rates, especially for cemented carbides with Co regardless the influence of carbide mean grain size. Corrosion damage resulted in strength degradation due to the formation of surface corrosion pits in acidic solution. In neutral and alkaline solutions, much less pronounced effects were determined. Focused Ion Beam (FIB)/ Field Emission Scanning Electron Microscopy (FESEM) results revealed differences in corrosion-induced damage scenario. In acidic solution, corrosion starts at binder pool centers and evolves towards binder/WC interfaces. Meanwhile, corrosion in alkaline solution is initially located at binder/WC interfaces, and subsequently expands into the ceramic particles, developing a microcrack network inside this phase.
Yafeng Zheng; Gemma Fargas; Elaine Armelin; Olivier Lavigne; Luis Llanes. Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium †. Metals 2019, 9, 1018 .
AMA StyleYafeng Zheng, Gemma Fargas, Elaine Armelin, Olivier Lavigne, Luis Llanes. Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium †. Metals. 2019; 9 (9):1018.
Chicago/Turabian StyleYafeng Zheng; Gemma Fargas; Elaine Armelin; Olivier Lavigne; Luis Llanes. 2019. "Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium †." Metals 9, no. 9: 1018.
In the present work, the corrosion affectation of an artistic and historical building, declared UNESCO World Heritage Site and constructed with AISI 1012 UPN profiles, was investigated. Micro-Raman and microscopy approaches highlight the complementarity and versatility of these techniques to evaluate the macroscopic and microscopic effect of the corrosion products in such reinforcing structures. The rust phases have been assessed by separating the oxide layers according to their environment placement and contaminants contact. The composition of iron oxides and oxyhydroxides in the metal surface depend not only on the oxygen concentration, but also on other elements that penetrated into the porous layers, as for example, chorine ions, sulfur ions, and microorganisms. Taking into account the scarce information on the indoor corrosion of AISI 1012 steel, results obtained in this work are expected to help for understanding the long-term impact of such oxides and oxyhydroxides on the material durability, as well as on its structural maintenances.
José I. Iribarren; Francisco Liesa; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. Spectroscopy investigations reveal unprecedented details in the corrosion of AISI 1012 UPN profiles installed in a modernist building of beginning of 20th century. Journal of Cultural Heritage 2019, 42, 240 -248.
AMA StyleJosé I. Iribarren, Francisco Liesa, Alvaro Meneguzzi, Carlos Alemán, Elaine Armelin. Spectroscopy investigations reveal unprecedented details in the corrosion of AISI 1012 UPN profiles installed in a modernist building of beginning of 20th century. Journal of Cultural Heritage. 2019; 42 ():240-248.
Chicago/Turabian StyleJosé I. Iribarren; Francisco Liesa; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. 2019. "Spectroscopy investigations reveal unprecedented details in the corrosion of AISI 1012 UPN profiles installed in a modernist building of beginning of 20th century." Journal of Cultural Heritage 42, no. : 240-248.
Composite i-PP/PEDOT films made of isotactic polypropylene (i-PP), which is frequently used for the fabrication of implantable medical devices for internal use, and chemically synthesized poly(3,4-ethylendioxythiophene) (PEDOT) nanoparticles, which are electroactive and biocompatible, have been prepared and used to detect bacterial metabolism. After chemical and morphological characterization, the properties (interfacial, mechanical, thermal and electrochemical) and biocompatibility of i-PP/PEDOT have been examined. Besides, carbon screen-printed electrodes coated with i-PP/PEDOT have been found to detect the growth of Gram-positive and Gram-negative bacteria through the oxidation of nicotinamide adenine dinucleotide (NADH), which comes from the bacteria metabolism (i.e. the respiration). Thus, as outer bacterial membranes are permeable to cytosolic NADH, this metabolite has been found to be an appropriated target for the detection of bacterial proliferation. In addition, the sensor does not respond towards eukaryotic cells. This is because the major NADH pool in eukaryotic cells is located at the mitochondria and, therefore, the concentration of in the medium is not high enough to be detected since the inner mitochondrial membrane is impermeable to NADH or NAD+.
Brenda G. Molina; Luis J. del Valle; Pau Turon; Elaine Armelin; Carlos Alemán. Electrochemical Sensor for Bacterial Metabolism Based on the Detection of NADH by Polythiophene Nanoparticles. The Journal of Physical Chemistry C 2019, 123, 22181 -22190.
AMA StyleBrenda G. Molina, Luis J. del Valle, Pau Turon, Elaine Armelin, Carlos Alemán. Electrochemical Sensor for Bacterial Metabolism Based on the Detection of NADH by Polythiophene Nanoparticles. The Journal of Physical Chemistry C. 2019; 123 (36):22181-22190.
Chicago/Turabian StyleBrenda G. Molina; Luis J. del Valle; Pau Turon; Elaine Armelin; Carlos Alemán. 2019. "Electrochemical Sensor for Bacterial Metabolism Based on the Detection of NADH by Polythiophene Nanoparticles." The Journal of Physical Chemistry C 123, no. 36: 22181-22190.
Design of an amphiphilic heterografted block copolymer composed of a hydrophobic core backbone and both hydrophilic side chains, able to detect the redox reaction of NADH.
Brenda G. Molina; Luminita Cianga; Anca-Dana Bendrea; Ioan Cianga; Carlos Alemán; Elaine Armelin. An amphiphilic, heterografted polythiophene copolymer containing biocompatible/biodegradable side chains for use as an (electro)active surface in biomedical applications. Polymer Chemistry 2019, 10, 5010 -5022.
AMA StyleBrenda G. Molina, Luminita Cianga, Anca-Dana Bendrea, Ioan Cianga, Carlos Alemán, Elaine Armelin. An amphiphilic, heterografted polythiophene copolymer containing biocompatible/biodegradable side chains for use as an (electro)active surface in biomedical applications. Polymer Chemistry. 2019; 10 (36):5010-5022.
Chicago/Turabian StyleBrenda G. Molina; Luminita Cianga; Anca-Dana Bendrea; Ioan Cianga; Carlos Alemán; Elaine Armelin. 2019. "An amphiphilic, heterografted polythiophene copolymer containing biocompatible/biodegradable side chains for use as an (electro)active surface in biomedical applications." Polymer Chemistry 10, no. 36: 5010-5022.
The electro-chemo-mechanical response of robust and flexible free-standing films made of three nanoperforated poly(lactic acid) (pPLA) layers separated by two anodically polymerized poly(3,4-ethylenedioxythiophene) (PEDOT) layers has been demonstrated. The mechanical and electrochemical properties of these films, which are provided by pPLA and PEDOT, respectively, have been studied by nanoindentation, cyclic voltammetry, and galvanostatic charge-discharge assays. The unprecedented combination of properties obtained for this system is appropriated for its utilization as a Faradaic motor, also named artificial muscle. Application of square potential waves has shown important bending movements in the films, which can be repeated for more than 500 cycles without damaging its mechanical integrity. Furthermore, the actuator is able to push a huge amount of mass, as it has been proved by increasing the mass of the passive pPLA up to 328% while keeping the mass of electroactive PEDOT unaltered.
Brenda G. Molina; Sergi Cuesta; Hossein Besharatloo; Joan Josep Roa; Elaine Armelin; Carlos Alemán. Free-Standing Faradaic Motors Based on Biocompatible Nanoperforated Poly(lactic Acid) Layers and Electropolymerized Poly(3,4-ethylenedioxythiophene). ACS Applied Materials & Interfaces 2019, 11, 29427 -29435.
AMA StyleBrenda G. Molina, Sergi Cuesta, Hossein Besharatloo, Joan Josep Roa, Elaine Armelin, Carlos Alemán. Free-Standing Faradaic Motors Based on Biocompatible Nanoperforated Poly(lactic Acid) Layers and Electropolymerized Poly(3,4-ethylenedioxythiophene). ACS Applied Materials & Interfaces. 2019; 11 (32):29427-29435.
Chicago/Turabian StyleBrenda G. Molina; Sergi Cuesta; Hossein Besharatloo; Joan Josep Roa; Elaine Armelin; Carlos Alemán. 2019. "Free-Standing Faradaic Motors Based on Biocompatible Nanoperforated Poly(lactic Acid) Layers and Electropolymerized Poly(3,4-ethylenedioxythiophene)." ACS Applied Materials & Interfaces 11, no. 32: 29427-29435.
In this study, a commercial and fully flexible monofilament mesh has been used for the deposition of a thermosensitive hydrogel, generated by graft copolymerization of N-isopropylacrylamide (NIPAAm) and N,N′-methylene bis(acrylamide) (MBA) monomers.
Sonia Lanzalaco; Pau Turon; Christine Weis; Carlos Alemán; Elaine Armelin. The mechanism of adhesion and graft polymerization of a PNIPAAm thermoresponsive hydrogel to polypropylene meshes. Soft Matter 2019, 15, 3432 -3442.
AMA StyleSonia Lanzalaco, Pau Turon, Christine Weis, Carlos Alemán, Elaine Armelin. The mechanism of adhesion and graft polymerization of a PNIPAAm thermoresponsive hydrogel to polypropylene meshes. Soft Matter. 2019; 15 (16):3432-3442.
Chicago/Turabian StyleSonia Lanzalaco; Pau Turon; Christine Weis; Carlos Alemán; Elaine Armelin. 2019. "The mechanism of adhesion and graft polymerization of a PNIPAAm thermoresponsive hydrogel to polypropylene meshes." Soft Matter 15, no. 16: 3432-3442.
Robust and flexible free-standing films made of spin-coated poly(lactic acid) (PLA) and poly(3,4-ethylenedioxythiophene) (PEDOT) nanolayers have been prepared. A steel sheet coated with a sacrificial layer of PEDOT:poly(styrenesulfonate) (PSS) and a spin-coated nanolayer of PLA was used as working electrode for the anodic polymerization of 3,4-ethylenedioxythiophene monomer. The latter was only successfully accomplished when rounded-shape nanoperforations of average diameter 49±14 nm were introduced into PLA layers, which was achieved by combining the phase segregation processes undergone by immiscible PLA:poly(vinyl alcohol) (PVA) mixtures with selective solvent etching to remove PVA domains. Nanoperforations allowed the utilization of the semiconducting PEDOT:PSS sacrificial layer to immobilize the electropolymerized PEDOT chains. Morphological and topographical studies show the templating effect of PEDOT layers. In addition of flexibility and mechanical strength, free-standing 5-layered films present good electrochemical activity, evidencing their potential ability to reversibly exchange ions with the medium. These properties offer important advantages with respect to those of neat PLA and supported PEDOT films, as has been illustrated by cell culture and protein adsorption assays. Cell cultures evidenced the superior behavior of 5-layered films as bioactive platforms for fibroblast and epithelial cells proliferation, while adsorption assays reflected their potential as selective bioadhesive surfaces for protein separation.
Brenda G. Molina; Sergi Cuesta; Anna Puiggali Jou; Luis J. del Valle; Elaine Armelin; Carlos Alemán. Perforated polyester nanomebranes as templates of electroactive and robust free-standing films. European Polymer Journal 2019, 114, 213 -222.
AMA StyleBrenda G. Molina, Sergi Cuesta, Anna Puiggali Jou, Luis J. del Valle, Elaine Armelin, Carlos Alemán. Perforated polyester nanomebranes as templates of electroactive and robust free-standing films. European Polymer Journal. 2019; 114 ():213-222.
Chicago/Turabian StyleBrenda G. Molina; Sergi Cuesta; Anna Puiggali Jou; Luis J. del Valle; Elaine Armelin; Carlos Alemán. 2019. "Perforated polyester nanomebranes as templates of electroactive and robust free-standing films." European Polymer Journal 114, no. : 213-222.
Electroactive and biocompatible fibrous scaffolds have been prepared and characterized using polyaniline (PAni) doped with dodecylbenzenesulfonic acid (DBSA) combined with poly(lactic acid) (PLA) and PLA/poly(ethylene glycol) (PEG) mixtures. The composition of simple and core–shell fibers, which have been obtained by both uniaxial and coaxial electrospinning, respectively, has been corroborated by Fourier-transform infrared and micro-Raman spectroscopies. Morphological studies suggest that the incorporation of PEG enhances the packing of PLA and PAni chains, allowing the regulation of the thickness of the fibers. PAni and PEG affect the thermal and electrical properties of the fibers, both decreasing the glass transition temperature and increasing the electrical conductivity. Interestingly, the incorporation of PEG improves the PAni-containing paths associated with the conduction properties. Although dose response curves evidence the high cytotoxicity of PAni/DBSA, cell adhesion and cell proliferation studies on PLA/PAni fibers show a reduction of such harmful effects as the conducting polymer is mainly retained inside the fibers through favorable PAni···PLA interactions. The incorporation of PEG into uniaxial fibers resulted in an increment of the cell mortality, which has been attributed to its rapid dissolution into the culture medium and the consequent enhancement of PAni release. In opposition, the delivery of PAni decreases and, therefore, the biocompatibility of the fibers increases when a shell coating the PAni-containing system is incorporated through coaxial electrospinning. Finally, morphological and functional studies using cardiac cells indicated that these fibrous scaffolds are suitable for cardiac tissue engineering applications.
Paula T. Bertuoli; Jesús Ordoño; Elaine Armelin; Soledad Pérez-Amodio; Alessandra F. Baldissera; Carlos Arthur Ferreira; Jordi Puiggalí; Elisabeth Engel; Luis J. Del Valle; Carlos Alemán. Electrospun Conducting and Biocompatible Uniaxial and Core–Shell Fibers Having Poly(lactic acid), Poly(ethylene glycol), and Polyaniline for Cardiac Tissue Engineering. ACS Omega 2019, 4, 3660 -3672.
AMA StylePaula T. Bertuoli, Jesús Ordoño, Elaine Armelin, Soledad Pérez-Amodio, Alessandra F. Baldissera, Carlos Arthur Ferreira, Jordi Puiggalí, Elisabeth Engel, Luis J. Del Valle, Carlos Alemán. Electrospun Conducting and Biocompatible Uniaxial and Core–Shell Fibers Having Poly(lactic acid), Poly(ethylene glycol), and Polyaniline for Cardiac Tissue Engineering. ACS Omega. 2019; 4 (2):3660-3672.
Chicago/Turabian StylePaula T. Bertuoli; Jesús Ordoño; Elaine Armelin; Soledad Pérez-Amodio; Alessandra F. Baldissera; Carlos Arthur Ferreira; Jordi Puiggalí; Elisabeth Engel; Luis J. Del Valle; Carlos Alemán. 2019. "Electrospun Conducting and Biocompatible Uniaxial and Core–Shell Fibers Having Poly(lactic acid), Poly(ethylene glycol), and Polyaniline for Cardiac Tissue Engineering." ACS Omega 4, no. 2: 3660-3672.
Aqueous polymer colloidal nanoparticles, composed by poly(methyl metacrylate), butyl acrylate, and acrylic acid, as “core” (P(MMA/BA/AA)); and polyaniline (PAni) doped with dodecylbenzenesulfonic acid (DBSA), as “shell”, were prepared. The complete synthesis consisted of two-steps. In the first step P(MMA/BA/AA) particles were obtained in a semi-continuous process by free radical emulsion polymerization, followed by a second step where the chemical oxidative polymerization of aniline monomers upper the “core” surfaces occurred. Transmission electron microscopy images (TEM) and dinamic light scattering (DLS) confirmed the obtaining of spherical nanoparticles, which are stable for further free solid film preparation and coatings for metal protection. The free films were characterized by FTIR, Raman, UV–vis, X-Ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), thermogravimetry (TGA), optical and scanning electron microscopy (SEM), static contact angle, mechanical properties and water absorption. The metal protection was evaluated after check the adhesion properties and the impedance parameters. The presence of a low concentration of PAni-DBSA (3 wt. %) on the acrylic polymer altered the hydrophilicity and the water uptake properties of the coatings without affecting the capability of obtaining passive layers for the protection of phosphatized carbon steel surface against corrosion, even after almost 20 days of immersion in NaCl aggressive solutions.
Paula T. Bertuoli; Alessandra F. Baldissera; Ademir J. Zattera; Carlos Arthur Ferreira; Carlos Alemán; Elaine Armelin. Polyaniline coated core-shell polyacrylates: Control of film formation and coating application for corrosion protection. Progress in Organic Coatings 2018, 128, 40 -51.
AMA StylePaula T. Bertuoli, Alessandra F. Baldissera, Ademir J. Zattera, Carlos Arthur Ferreira, Carlos Alemán, Elaine Armelin. Polyaniline coated core-shell polyacrylates: Control of film formation and coating application for corrosion protection. Progress in Organic Coatings. 2018; 128 ():40-51.
Chicago/Turabian StylePaula T. Bertuoli; Alessandra F. Baldissera; Ademir J. Zattera; Carlos Arthur Ferreira; Carlos Alemán; Elaine Armelin. 2018. "Polyaniline coated core-shell polyacrylates: Control of film formation and coating application for corrosion protection." Progress in Organic Coatings 128, no. : 40-51.
In this work, we report the design and fabrication of a dual-function integrated system to monitor, in real time, the release of previously loaded 2-methyl-1,4-naphthoquinone (MeNQ), also named vitamin K3. The newly developed system consists of poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles, which were embedded into a poly-γ-glutamic acid (γ-PGA) biohydrogel during the gelling reaction between the biopolymer chains and the cross-linker, cystamine. After this, agglomerates of PEDOT nanoparticles homogeneously dispersed inside the biohydrogel were used as polymerization nuclei for the in situ anodic synthesis of poly(hydroxymethyl-3,4-ethylenedioxythiophene) in aqueous solution. After characterization of the resulting flexible electrode composites, their ability to load and release MeNQ was proven and monitored. Specifically, loaded MeNQ molecules, which organized in shells around PEDOT nanoparticles agglomerates when the drug was simply added to the initial gelling solution, were progressively released to a physiological medium. The latter process was successfully monitored using an electrode composite through differential pulse voltammetry. The fabrication of electroactive flexible biohydrogels for real-time release monitoring opens new opportunities for theranostic therapeutic approaches.
Brenda G. Molina; Eva Domínguez; Elaine Armelin; Carlos Alemán. Assembly of Conducting Polymer and Biohydrogel for the Release and Real-Time Monitoring of Vitamin K3. Gels 2018, 4, 86 .
AMA StyleBrenda G. Molina, Eva Domínguez, Elaine Armelin, Carlos Alemán. Assembly of Conducting Polymer and Biohydrogel for the Release and Real-Time Monitoring of Vitamin K3. Gels. 2018; 4 (4):86.
Chicago/Turabian StyleBrenda G. Molina; Eva Domínguez; Elaine Armelin; Carlos Alemán. 2018. "Assembly of Conducting Polymer and Biohydrogel for the Release and Real-Time Monitoring of Vitamin K3." Gels 4, no. 4: 86.