Закономерности формирования полимерных пленок на основе хитозана, модифицированных серебросодержащими наночастицами
Аннотация
Наука, связанная с нанотехнологиями, активно развивается, и одним из ее
перспективных направлений являются исследования по разработке антибактериальных
препаратов на базе композитов из неорганических частиц серебра и полимеров.
Представлены результаты исследования влияния концентрации растворов хитозана на
размерные характеристики серебросодержащих частиц, их распределение по поверхности
пленок хитозана и формирование структурированных пленок. Показано, что в разбавленных
растворах хитозана получаемая дисперсия частиц серебра характеризуется размером частиц
12 нм и узким распределением. Повышение концентрации хитозана до концентрации
кроссовера приводит к образованию агломератов размерами до 140 нм состоящих из малых
частиц. Наполненные частицами серебра пленки хитозана полученные из разбавленных и
концентрированных растворов хитозана характеризуются разным распределением частиц
серебра по поверхности пленки. Добавление пектина к хитозану привело к получению
структурированной пленки с равномерным распределением по поверхности частиц серебра
размером 15 нм. Структурирование поверхности пленки происходит также при получении
положительно и отрицательно заряженных наноразмерных частиц иодида серебра. При этом
соотношение Ag/I в составе частиц, полученных в растворе хитозана, сохраняется и в
процессе формирования пленки.
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