丝素蛋白/聚乙烯醇复合膜的制备及其表征

doi:10.13475/j.fzxb.20180103307

Abstract

Abstract:

In order to discuss the influence of co-dissolution processing inionic liquid on structure and properties of silk fibroin composite membrane, the dugummed silk fiber and polyvinyl alcohol powder were dissolved by ionic liquid 1- allyl -3- methyl imidazolyl chloride ([Amim]Cl), respectively, and then the two dissolving systems were mixed according to different mass proportions and poured into a film former. After being soaked in methanol, [Amim]Cl was removed and naturally air-dried to form membranes. The composite membranes were tested and characterized by rltraviolet spectrophotometer, X-ray diffractometer, scanning electron microscope, optical contact angle meter and ultraviolet light resistant test box. The results show that the cimpatibility of silk fibroin and polyvinyl alcohol components can be improved by the [Amim]Cl co-dissolution method, the silk fibroin component during film formation migrates to the surface of the membrane, and its main conformation is the silk II structure. In addition, the surface roughness of the composite membrane increases with the increasing of the ratio of silk fibroin in the composite system, leading to the improvement of the hydrophilicity of the composite membrane. At the same time, the increasing of the ratio of silk fibroin will accelerate the photo-aging process of the composite membrane.

Key words: ionic liquid, silk, silk fibroin, polyvinyl alcohol, composite membane, photo-aging

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Preparation and characterization of silk fibroin /polyvinyl alcohol composite membrane

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