Bargan Alexandra; Stiubianu George; Cojocaru Corneliu: New silicone-based membranes with functionalized silsesquioxanes: characterization and perspectives for environmental and biological applications.
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A series of three cubic silsesquioxanes, containing either the original organic function (SH) (silsesquioxane 2, SH_SS), a derivatized one (NH3Cl) (silsesquioxane 1, A_SS) or completely chloro derivative (silsesquioxane 3, Cl_SS) were obtained by acid hydrolysis of three organotrialkoxysilane (3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane and 3- cyanopropyltriethoxysilane). The structures were investigated through X-ray single crystal diffraction, spectral techniques and elemental analysis. Each silsesquioxane compound was incorporated into a polymeric matrix of low molecular weight polydimethylsiloxane. After the incorporation of the silsesquioxanes, the matrix crosslinking was performed resulting in freestanding films. The composite films were investigated by dynamic vapour sorption (DVS) analysis, scanning electron microscopy (SEM), stress–strain measurements and dielectric spectroscopy. Thermal behavior was studied by thermogravimetric analysis and differential scanning calorimetry. The presence of the siloxane moiety in the materials, improves due to its surface energy effect the compatibility between the silsesquioxanes and the silicone matrix, thus ensuring good mechanical properties. The biological compatibility was tested for all the composite films. Investigations on hybrid membranes surface, based on the water vapor sorption data, have demonstrated that on their surface exist nano-sized pores. The values of water vapors sorption capacities increase in the following order: P_Cl_SS < P_SH_SS<P_A_SS. Consequently, in accordance with our results, for obtaining a good membrane with superior characteristics for environmental applications it is necessary to ensure a high pore density and a high permeability of the free-standing film membrane.
| Mű típusa: | Konferencia vagy workshop anyag |
|---|---|
| Befoglaló folyóirat/kiadvány címe: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Dátum: | 2025 |
| Kötet: | 31 |
| ISBN: | 978-963-688-078-1 |
| Oldalak: | pp. 107-110 |
| Nyelv: | angol |
| Kiadó: | University of Szeged |
| Kiadás helye: | Szeged |
| Konferencia neve: | 31th International Symposium on Analytical and Environmental Problems |
| Konferencia típusa: | Konferencia |
| Helyszin: | Szeged |
| Dátum: | 2025. október 13-14. |
| Befoglaló mű URL: | https://acta.bibl.u-szeged.hu/88570/ |
| Kulcsszavak: | Polimerkémia |
| Megjegyzések: | Bibliogr.: 110. p. ; ill. ; összefoglalás angol nyelven |
| Szakterület: | 01. Természettudományok 01. Természettudományok > 01.04. Kémiai tudományok |
| Feltöltés dátuma: | 2025. nov. 07. 14:09 |
| Utolsó módosítás: | 2025. nov. 07. 14:09 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/88637 |
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