聚乙烯醇生物降解的影响因素  

EFFECT FACTORS ON THE BIODEGRADATTION OF POLY (VINYL ALCOHOL)

作　　者：刘白玲[1] 曾祥成[1] 杨金华[1] 贾艳伟 张颖[1] 李坤福[1] 

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室

出　　处：《材料研究学报》2000年第B01期108-112,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金!29574172

摘　　要：研究了水溶性高分子聚烯醇（ＰＶＡ）的生物降解性及其影响因素结果表明， ＰＶＡ的分子量、结晶度对其生物降解性具有决定作用通过等离子体作用或氧化处理，可在ＰＶＡ分子上引入＞Ｃ＝Ｏ、一Ｏ＝Ｃ-Ｏ、一ＣＯＯＨ等基团。The factors affecting the biodegradation of poly (vinyl alcohol) (PVA) were investigated. The experimental results showed that the molecular weight and crystallinity of PVA were the dominant factors. The higher the Mw of PVA, the lower the biodegradation rate. The biodegradation of PVA mainly occured in the amorphous region due to PVA which can easily form the conformation required by PVA depolymerases and hydrolytic enzymes secreted by bacteria. When the PVA film was treated by plasma or oxidized by HZO2. the biodegradation of PVA was accelerated obviously. It can be attributed to that more hydrophilic groups were introduced into PVA, which will attract bacteria to reach and allow depolymerases to contact with PVA.

关 键 词：聚乙烯醇 生物降解 等离子体处理 降解速率 

分 类 号：O631.3[理学—高分子化学] O632.31[理学—化学]