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Dr. JOANNA KARASIEWICZ
Department of Chemistry and Technology of Silicon Compounds, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland

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0 Bioinorganic Chemistry
0 Inorganic Materials
0 Organometallic Chemistry
0 Protective Coatings
0 organosilicon compounds

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Journal article
Published: 01 December 2020 in Molecules
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The trisiloxane polyether surfactant (3-[3-(hydroxy)(polyethoxy)propyl]-1,1,1,3,5,5,5 -heptamethyltrisiloxane) (TS-EO12) was successfully synthesized by a hydrosilylation reaction in the presence of Karstedt catalyst. The structural analysis of the surfactant was done by 1H-NMR, 13C-NMR, 29Si-NMR and FT-IR analysis. In addition the thermal stability of TS-EO12 was studied by the thermogravimetric measurements. On the one hand the surface properties of TS-EO12 at the water-air interface were investigated by surfactant aqueous solutions surface tension measurements carried out at 293 K, 303 K and 313 K, and on the other the aggregation properties were analyzed based on the solubilization properties of TS-EO12 aggregates at different temperatures. On the basis of the obtained thermodynamic parameters of adsorption and micellization of studied surfactant the temperature impact on its surface and volume properties were deduced. It was proved that the tendency of the studied surfactant molecules to adsorb at the water-air interface and to form micelles weakens with decreasing temperature. It was also concluded that the structure of the adsorption layer changes with temperature. Optical microscopy measurements were used for the TS-EO12 micelle morphology determination.

ACS Style

Joanna Karasiewicz; Joanna Krawczyk. Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes. Molecules 2020, 25, 5669 .

AMA Style

Joanna Karasiewicz, Joanna Krawczyk. Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes. Molecules. 2020; 25 (23):5669.

Chicago/Turabian Style

Joanna Karasiewicz; Joanna Krawczyk. 2020. "Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes." Molecules 25, no. 23: 5669.

Journal article
Published: 30 July 2018 in Progress in Organic Coatings
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This study discusses the effect of 3-(1,1,2,2,3,3,4,4-octafluoropentyloxy)propyltriethoxysilane (OFTES) based coatings on the anti-corrosive properties of 304 type stainless steel, which has not been described to date. The coatings were deposited from methanol using the anhydrous deposition method and influence of the sonication on this process has also been investigated. Anti-corrosive properties of modified and unmodified steel surfaces have been characterized by electrochemical and surface analysis methods. Since silicon is an element capable of forming bonds with both organic and inorganic substrates, these features allow to combine organofunctional silanes with metal as well as steel surfaces through metalOSi covalent bonds. A fluorinated alkyl chain, which is attached to the silicon atom, forms an effective barrier against an aggressive aqueous environment.

ACS Style

Karol Szubert; Jarosław Wojciechowski; Joanna Karasiewicz; Hieronim Maciejewski; Grzegorz Lota. Corrosion-protective coatings based on fluorocarbosilane. Progress in Organic Coatings 2018, 123, 374 -383.

AMA Style

Karol Szubert, Jarosław Wojciechowski, Joanna Karasiewicz, Hieronim Maciejewski, Grzegorz Lota. Corrosion-protective coatings based on fluorocarbosilane. Progress in Organic Coatings. 2018; 123 ():374-383.

Chicago/Turabian Style

Karol Szubert; Jarosław Wojciechowski; Joanna Karasiewicz; Hieronim Maciejewski; Grzegorz Lota. 2018. "Corrosion-protective coatings based on fluorocarbosilane." Progress in Organic Coatings 123, no. : 374-383.

Journal article
Published: 01 June 2018 in Applied Surface Science
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ACS Style

Anna Wamke; Jaroslaw Makowiecki; Katarzyna Dopierała; Joanna Karasiewicz; Krystyna Prochaska. Hydrophobic ultrathin films formed by fluorofunctional cage silsesquioxanes. Applied Surface Science 2018, 443, 280 -290.

AMA Style

Anna Wamke, Jaroslaw Makowiecki, Katarzyna Dopierała, Joanna Karasiewicz, Krystyna Prochaska. Hydrophobic ultrathin films formed by fluorofunctional cage silsesquioxanes. Applied Surface Science. 2018; 443 ():280-290.

Chicago/Turabian Style

Anna Wamke; Jaroslaw Makowiecki; Katarzyna Dopierała; Joanna Karasiewicz; Krystyna Prochaska. 2018. "Hydrophobic ultrathin films formed by fluorofunctional cage silsesquioxanes." Applied Surface Science 443, no. : 280-290.

Journal article
Published: 28 September 2016 in RSC Advances
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Fluorinated polyhedral oligomeric silsesquioxanes (POSS) have been established as useful for the fabrication of superhydrophobic coatings, however little attention has been paid to their use for making ultrathin film by the Langmuir–Blodgett method.

ACS Style

Katarzyna Dopierala; K. Bojakowska; J. Karasiewicz; Hieronim Maciejewski; K. Prochaska. Interfacial behaviour of cubic silsesquioxane and silica nanoparticles in Langmuir and Langmuir–Blodgett films. RSC Advances 2016, 6, 94934 -94941.

AMA Style

Katarzyna Dopierala, K. Bojakowska, J. Karasiewicz, Hieronim Maciejewski, K. Prochaska. Interfacial behaviour of cubic silsesquioxane and silica nanoparticles in Langmuir and Langmuir–Blodgett films. RSC Advances. 2016; 6 (97):94934-94941.

Chicago/Turabian Style

Katarzyna Dopierala; K. Bojakowska; J. Karasiewicz; Hieronim Maciejewski; K. Prochaska. 2016. "Interfacial behaviour of cubic silsesquioxane and silica nanoparticles in Langmuir and Langmuir–Blodgett films." RSC Advances 6, no. 97: 94934-94941.

Journal article
Published: 02 August 2016 in Chemistry – A European Journal
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Recently, silsesquioxanes have been recognized as a new group of film-forming materials. This study has been aimed at determining the effect of the kind of functional groups present in two different open-cage structure POSS molecules on the possibility of the formation of Langmuir monolayers and their properties. To achieve this goal, two new POSS derivatives (of open-cage structures) containing polyether and fluoroalkyl functional groups have been synthesized on the basis of a hydrosilylation process. An optimization of the process was performed, which makes it possible to obtain the above-mentioned derivatives with high yields. In the next step, the Langmuir technique was applied to measurements of the surface pressure (π) − the mean molecular area (A) isotherms during the compression of monolayers formed by molecules of the two POSS derivatives considered. Subsequently, the monolayers were transferred onto quartz plates according to the Langmuir–Blodgett technique. Both derivatives are able to form insoluble Langmuir films at the air–water interface, which can be transferred onto a solid substrate and effectively change its wetting properties.

ACS Style

Michał Dutkiewicz; Joanna Karasiewicz; Monika Rojewska; Marta Skrzypiec; Katarzyna Dopierala; Krystyna Prochaska; Hieronim Maciejewski. Synthesis of an Open-Cage Structure POSS Containing Various Functional Groups and Their Effect on the Formation and Properties of Langmuir Monolayers. Chemistry – A European Journal 2016, 22, 13275 -13286.

AMA Style

Michał Dutkiewicz, Joanna Karasiewicz, Monika Rojewska, Marta Skrzypiec, Katarzyna Dopierala, Krystyna Prochaska, Hieronim Maciejewski. Synthesis of an Open-Cage Structure POSS Containing Various Functional Groups and Their Effect on the Formation and Properties of Langmuir Monolayers. Chemistry – A European Journal. 2016; 22 (37):13275-13286.

Chicago/Turabian Style

Michał Dutkiewicz; Joanna Karasiewicz; Monika Rojewska; Marta Skrzypiec; Katarzyna Dopierala; Krystyna Prochaska; Hieronim Maciejewski. 2016. "Synthesis of an Open-Cage Structure POSS Containing Various Functional Groups and Their Effect on the Formation and Properties of Langmuir Monolayers." Chemistry – A European Journal 22, no. 37: 13275-13286.

Journal article
Published: 12 December 2014 in Silicon
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Consecutive hydrosilylation-based syntheses were performed of silsesquioxanes containing mixed groups 1H,1H,2H,2H-perfluorooctyl (PFD) or octafluoropentyloxypropyl (OFP) and trimethoxysilylethyl (TMS) in different stoichiometric ratios. The presence of TMS makes it possible to form covalent bonds with substrates due to the reactivity of this group. All obtained derivatives were applied to hydrophobization of glass plates and by comparison of water contact angles (WCA) on modified surfaces the effect of silsesquioxane structure as well as TMS and fluoroalkyl group contents on hydrophobic properties was determined. Moreover, an additional glass plates surface modification was performed in order to obtain superhydrophobic surfaces. Two silica types of different specific surface (300 and 130 m2/g) and particle size (7 and 16 nm) parameters were used in this case for initial surface modification in order to increase its roughness. Irrespectively of particle size of applied silica, a dependence was found between the increase in water contact angle and the number of fluoroalkyl substituents in a molecule.

ACS Style

Hieronim Maciejewski; Joanna Karasiewicz; Michał Dutkiewicz; Bogdan Marciniec. Hydrophobic Materials Based on Fluorocarbofunctional Spherosilicates. Silicon 2014, 7, 201 -209.

AMA Style

Hieronim Maciejewski, Joanna Karasiewicz, Michał Dutkiewicz, Bogdan Marciniec. Hydrophobic Materials Based on Fluorocarbofunctional Spherosilicates. Silicon. 2014; 7 (2):201-209.

Chicago/Turabian Style

Hieronim Maciejewski; Joanna Karasiewicz; Michał Dutkiewicz; Bogdan Marciniec. 2014. "Hydrophobic Materials Based on Fluorocarbofunctional Spherosilicates." Silicon 7, no. 2: 201-209.

Journal article
Published: 01 October 2014 in Reactive and Functional Polymers
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ACS Style

Hieronim Maciejewski; Joanna Karasiewicz; Agnieszka Dutkiewicz; Michał Dutkiewicz; Katarzyna Dopierala; Krystyna Prochaska. Synthesis and properties of polysiloxanes containing mixed functional groups. Reactive and Functional Polymers 2014, 83, 144 -154.

AMA Style

Hieronim Maciejewski, Joanna Karasiewicz, Agnieszka Dutkiewicz, Michał Dutkiewicz, Katarzyna Dopierala, Krystyna Prochaska. Synthesis and properties of polysiloxanes containing mixed functional groups. Reactive and Functional Polymers. 2014; 83 ():144-154.

Chicago/Turabian Style

Hieronim Maciejewski; Joanna Karasiewicz; Agnieszka Dutkiewicz; Michał Dutkiewicz; Katarzyna Dopierala; Krystyna Prochaska. 2014. "Synthesis and properties of polysiloxanes containing mixed functional groups." Reactive and Functional Polymers 83, no. : 144-154.

Journals
Published: 01 January 2014 in RSC Advances
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Different fluorofunctional organosilicon compounds were used for glass surface modification and the influence of their structure on the surface hydrophobic properties was investigated.

ACS Style

Hieronim Maciejewski; Joanna Karasiewicz; Michał Dutkiewicz; Marek Nowicki; Łukasz Majchrzycki. Effect of the type of fluorofunctional organosilicon compounds and the method of their application onto the surface on its hydrophobic properties. RSC Advances 2014, 4, 52668 -52675.

AMA Style

Hieronim Maciejewski, Joanna Karasiewicz, Michał Dutkiewicz, Marek Nowicki, Łukasz Majchrzycki. Effect of the type of fluorofunctional organosilicon compounds and the method of their application onto the surface on its hydrophobic properties. RSC Advances. 2014; 4 (95):52668-52675.

Chicago/Turabian Style

Hieronim Maciejewski; Joanna Karasiewicz; Michał Dutkiewicz; Marek Nowicki; Łukasz Majchrzycki. 2014. "Effect of the type of fluorofunctional organosilicon compounds and the method of their application onto the surface on its hydrophobic properties." RSC Advances 4, no. 95: 52668-52675.

Research article
Published: 28 October 2013 in Journal of Nanomaterials
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Hydrophobic powders were obtained via surface modification of silica or magnesium silicate with selected silanes. A modified precipitation method, carried out in an emulsion system, was used for monodisperse silica synthesis, while magnesium silicate was precipitated in a traditional water system. Functionalization of the obtained inorganic supports was performed with selected alkylsilanes: one newly synthesized, 3-(2,2,3,3,4,4,5,5-octafluoropentyloxy)propyltriethoxysilane (OPF), and two commercial, octadecylsilane (ODS) and octyltriethoxysilane C14H32O3Si (OCS), in amounts of 3, 5, or 10 weight parts by mass of SiO2. It was determined how the chemical modification of the silica or magnesium silicate surface affected its physicochemical properties. The dispersive characteristics of both unmodified and functionalized silica-based systems were evaluated. The morphology and microstructure of the samples obtained were analyzed using scanning electron microscopy. The parameters of porous structure of the prepared systems were evaluated on the basis of BET equation as well as nitrogen adsorption/desorption isotherms. Wettability tests as well as elemental analysis of the obtained inorganic oxide hybrids were also performed. In order to verify the effectiveness of silica and magnesium silicate surface functionalization with selected silanes, FTIR spectra were investigated. The resulting experimental data allowed calculation of the degree of coverage of the silica-based systems with modifying agents.

ACS Style

Damian Ambrożewicz; Filip Ciesielczyk; Magdalena Nowacka; Joanna Karasiewicz; Adam Piasecki; Hieronim Maciejewski; Teofil Jesionowski. Fluoroalkylsilane versus Alkylsilane as Hydrophobic Agents for Silica and Silicates. Journal of Nanomaterials 2013, 2013, 1 -13.

AMA Style

Damian Ambrożewicz, Filip Ciesielczyk, Magdalena Nowacka, Joanna Karasiewicz, Adam Piasecki, Hieronim Maciejewski, Teofil Jesionowski. Fluoroalkylsilane versus Alkylsilane as Hydrophobic Agents for Silica and Silicates. Journal of Nanomaterials. 2013; 2013 ():1-13.

Chicago/Turabian Style

Damian Ambrożewicz; Filip Ciesielczyk; Magdalena Nowacka; Joanna Karasiewicz; Adam Piasecki; Hieronim Maciejewski; Teofil Jesionowski. 2013. "Fluoroalkylsilane versus Alkylsilane as Hydrophobic Agents for Silica and Silicates." Journal of Nanomaterials 2013, no. : 1-13.

Journal article
Published: 01 October 2013 in Applied Surface Science
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ACS Style

Katarzyna Dopierala; Hieronim Maciejewski; Joanna Karasiewicz; Krystyna Prochaska. Alkyl- and fluoroalkyltrialkoxysilanes for wettability modification. Applied Surface Science 2013, 283, 453 -459.

AMA Style

Katarzyna Dopierala, Hieronim Maciejewski, Joanna Karasiewicz, Krystyna Prochaska. Alkyl- and fluoroalkyltrialkoxysilanes for wettability modification. Applied Surface Science. 2013; 283 ():453-459.

Chicago/Turabian Style

Katarzyna Dopierala; Hieronim Maciejewski; Joanna Karasiewicz; Krystyna Prochaska. 2013. "Alkyl- and fluoroalkyltrialkoxysilanes for wettability modification." Applied Surface Science 283, no. : 453-459.

Journal article
Published: 25 July 2013 in ChemInform
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ACS Style

Hieronim Maciejewski; Joanna Karasiewicz. ChemInform Abstract: Technologies of Syntheses of Fluorofunctional Silicon Compounds. ChemInform 2013, 44, 1 .

AMA Style

Hieronim Maciejewski, Joanna Karasiewicz. ChemInform Abstract: Technologies of Syntheses of Fluorofunctional Silicon Compounds. ChemInform. 2013; 44 (33):1.

Chicago/Turabian Style

Hieronim Maciejewski; Joanna Karasiewicz. 2013. "ChemInform Abstract: Technologies of Syntheses of Fluorofunctional Silicon Compounds." ChemInform 44, no. 33: 1.

Journal article
Published: 01 June 2012 in Polimery
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ACS Style

Hieronim Maciejewski; Joanna Karasiewicz; Bogdan Marciniec. Effective synthesis of fluorofunctional (poly)siloxanes. Polimery 2012, 57, 449 -455.

AMA Style

Hieronim Maciejewski, Joanna Karasiewicz, Bogdan Marciniec. Effective synthesis of fluorofunctional (poly)siloxanes. Polimery. 2012; 57 (6):449-455.

Chicago/Turabian Style

Hieronim Maciejewski; Joanna Karasiewicz; Bogdan Marciniec. 2012. "Effective synthesis of fluorofunctional (poly)siloxanes." Polimery 57, no. 6: 449-455.

Journal article
Published: 25 April 2011 in Organometallics
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ACS Style

Michał Dutkiewicz; Hieronim Maciejewski; Bogdan Marciniec; Joanna Karasiewicz. New Fluorocarbofunctional Spherosilicates: Synthesis and Characterization. Organometallics 2011, 30, 2149 -2153.

AMA Style

Michał Dutkiewicz, Hieronim Maciejewski, Bogdan Marciniec, Joanna Karasiewicz. New Fluorocarbofunctional Spherosilicates: Synthesis and Characterization. Organometallics. 2011; 30 (8):2149-2153.

Chicago/Turabian Style

Michał Dutkiewicz; Hieronim Maciejewski; Bogdan Marciniec; Joanna Karasiewicz. 2011. "New Fluorocarbofunctional Spherosilicates: Synthesis and Characterization." Organometallics 30, no. 8: 2149-2153.