可降解魔芋葡甘聚糖基互穿膜的制备、结构与性能  

Synthesis, structure and characterization of konjac glucomannan based degradable interpenetrating polymer networks films

作　　者：李斌[1] 吴俊[2] 汪超[1] 谢笔钧[1] 

机构地区：[1]华中农业大学食品科技学院,武汉430070 [2]军事经济学院营养与食品科学系,武汉430070

出　　处：《农业工程学报》2004年第6期155-159,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"资助项目(2002AA6Z3181)

摘　　要：魔芋葡甘聚糖(konjacglucomannan,KGM)和聚乙烯醇(poly(vinylalcohol),PVA)以戊二醛进行交联,成功制备了一种新的互穿聚合物网络(interpenetratingpolymernetworks,IPN)。以传统的流延法于室温下干燥2d,得40μm厚透明IPN膜。以傅立叶红外光谱、扫描电镜、示差扫描量热法、X-射线衍射和紫外可见光谱等表征了膜的结构。结果表明:由于交联键的产生,PVA和KGM分子间发生了强烈的相互作用,当反应时间达到4h时,分子间达到了完全混溶。拉伸强度、断裂伸长率大大高于而吸湿性显著低于纯PVA膜、KGM膜以及它们的简单共混膜,亦即IPN结构的产生赋予了膜优异的性能。A novel interpenetrating polymer networks(IPN) coded as KP were synthesized successfully from Poly(vinyl alcohol) (PVA) and konjac glucomannan(KGM) in the presence of glutaraldehyde as a crosslink agent. The transparent IPN films that were 40 μm thick were prepared by means of conventional solvent-casting technique and dried at room temperature for 2 d. The structure and miscibility of the KP IPN films were studied by Fourier transformed infrared spectra (FTIR), scanning electron microscopy(SEM), differential scanning calorimetry(DSC), wide-angle X-ray diffraction(WAXD) and ultraviolet visible spectroscopy (UV-Vis). The results indicated that strong intermolecular interaction caused by crosslink bonding between PVA and KGM existed in the IPN films, resulting in wonderful miscibility when the reaction time is 4 h. The tensile strength, elongation at break were much higher than that of the pure PVA film, KGM film and uncrosslinked blend films, and the moisture absorption decreased evidently. In other words, the structure of IPN endowed the films with excellent performance.

关 键 词：聚乙烯醇 魔芋葡甘聚糖 互穿聚合物网络 生物降解材料 交联反应 

分 类 号：S377[农业科学—农产品加工]