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Obtaining functional fibrous materials based on polylactide by the mechanism of crazingтезисы доклада
- Авторы: Khavpachev M.A., Trofimchuk E.S., Nikonorova N.I., Uspenskii S.A.
- Сборник: The VII All-Russian with International Participation Bakeyev Conference «MACROMOLECULAR NANOOBJECTS AND POLYMER NANOCOMPOSITES»
- Тезисы
- Год издания: 2018
- Первая страница: 186
- Последняя страница: 186
- Аннотация: In this work, unoriented amorphous fibers based on polylactide (PLA) were uniaxial stretched in the water-ethanol solutions (ethanol content of 10-75 wt%) of different antiseptic agents, namely, in 0.5 wt% solution of brilliant green or carbol fuchsin and in 5 wt% solution of iodine. It was determined that uniaxial deformation of PLA in water-ethanol solutions with an ethanol concentration of more than 30-40 wt% proceeds to the high tensile strain of 400-600% via the mechanism of crazing and is accompanied by crystallization of polymer fibrils formed in crazes (the degree of crystallinity reaches 40%). Simultaneously with the development of a highly disperse fibrillar-porous structure, an imbibition of antiseptic substances from AAM to fiber occurs (for example, the concentration of brilliant green in the fiber was 0.06-0.07 wt%). The antimicrobial properties of the fibers obtained were studied. It has been found that fibers containing carbol fuchsin or iodine have bacteriostatic properties for gram-positive actinobacterium Rhodococcus erythropolis X5. Thus, crazing is an effective and universal approach to solving the problem of obtaining functional fibrous materials by introducing various additives into the polymer, as well as a predictable modification of the structure and properties of fibers.
- Добавил в систему: Хавпачев Мухамед Аликович