Features of formation and structure of silicon–polysaccharide-containing polyolate hydrogels obtained by the method of biomimetic mineralization
| Autor: | Maria E. Novoselova, Dmitry K. Kuznetsov, Elena Nikitina, T. G. Khonina, M. V. Ivanenko, E. V. Shadrina, M. S. Karabanalov |
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| Rok vydání: | 2019 |
| Předmět: |
Green chemistry
Materials science 02 engineering and technology 010402 general chemistry Polysaccharide 01 natural sciences Biomaterials Chitosan chemistry.chemical_compound Materials Chemistry medicine chemistry.chemical_classification Syneresis technology industry and agriculture Cationic polymerization General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Self-healing hydrogels Ceramics and Composites 0210 nano-technology Xanthan gum Hydroxyethyl cellulose medicine.drug |
| Zdroj: | Journal of Sol-Gel Science and Technology. 92:376-385 |
| ISSN: | 1573-4846 0928-0707 |
| DOI: | 10.1007/s10971-019-04982-9 |
| Popis: | We have demonstrated that our patented water-soluble biocompatible polyolate precursors of silicon tetraglycerolate and silicon tetrapolyethylene glycolate can be successfully utilized in biomimetical mineralization of polysaccharides of different nature. By the example of chitosan (cationic), xanthan gum (anionic), and hydroxyethyl cellulose (uncharged) polysaccharides, an accelerating effect on the gelation process has been demonstrated, and a stabilizing effect has been revealed on the hydrogels formed as transparent monoliths showing resistance to syneresis. Structural features of silicon–polysaccharide-containing hydrogels were investigated using advanced physical methods of cryo-scanning electron microscopy and transmission electron microscopy. Thus formed silicon-containing 3D network of gels is found to be polymeric and appears to have an ordered amorphous morphostructure, which can be explained as caused by the effect of polysaccharides serving as templates. The difference in the reactivity of precursors leads to the peculiarities of the gelation process in the presence of the polysaccharides under study, as well as to the difference in the composition of the formed products. The sol-gel process utilized to obtain the silicon–polysaccharide-containing hydrogels proceeds under the mild conditions with no catalyst or any organic solvent, and thus can be regarded as belonging to the green chemistry methods that show promise for biomedical material applications. |
| Databáze: | OpenAIRE |
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