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Structural characterization of novel chitosan and cellulose-based composite materials with silver nanoparticles prepared via eco-sustainable approachтезисы доклада
- Авторы: Rubina M.S., Elmanovich I.V., Shulenina A.V.
- Сборник: Participants' abstracts of RACIRI summer school 2018 "From basic science applications to technologies inspired by Nature"
- Тезисы
- Год издания: 2018
- Место издания: Rugen, Germany
- Первая страница: 61
- Аннотация: Polysacharide-based materials in various forms like porous microgranules, blocks, films, etc. are widely used for biomedical applications. Incorporation of biocide silver nanoparticles to a biopolymer matrix improves its antimicrobial properties making it a promising candidate as a dressing material for treatment of infected wounds. In this work we present a synthetic approach that combines environmentally safe techniques of metal vapor synthesis (MVS) and supercritical drying for preparation of porous chitosan and cellulose-based materials with silver nanoparticles. The MVS is an efficient and eco-sustainable method to produce biologically active metal nanoparticles in an appropriate organic solvent without using surfactants or other additional stabilizing agents. Using MVS we produced colloidal solutions of silver nanoparticles which were deposited on chitosan flakes and on microcrystalline cellulose powder to prepare metal-polymer nanocomposites. Two types of composite materials were obtained: films and porous aerogels. Films were produced via a simple casting and drying procedure. In order to obtain porous materials the powder of the silver nanoparticles containing biopolymer was dissolved in acidic or basic conditions with subsequent physical gelation followed by supercritical drying of the formed gels. The structural characterization of all the prepared materials was done using synchrotron radiation techniques including powder X-ray diffraction and small-angle X-ray scattering. We also used scanning electron microscopy and low temperature nitrogen adsorption measurements in this work. We believe that such a thorough investigation with modern analytical methods is utterly important for understanding the structure of materials on different levels of organization, from atomic to macroscopic. Thus it can be very useful for revealing the structure-properties dependency which is the key for designing new materials with functional properties.
- Добавил в систему: Шуленина Александра Владимировна