尿素改性羊毛角蛋白复合膜的性能  

Properties of wool keratin composite membranes by urea modification

作　　者：曾春慧[1,2] 张晓君 王嵬[1] 何爱民[1] 王冬[1] 

机构地区：[1]东北电力大学化学工程学院应化系,吉林吉林132012 [2]天津工业大学生物与纺织材料研究所,天津300160

出　　处：《中国皮革》2015年第18期11-16,23,共7页China Leather

摘　　要：采用交联改性方法制备羊毛角蛋白／羟甲基纤维素钠（CMCNa）／尿素复合膜，通过正交试验和单因素对比试验考察交联剂尿素对复合膜性能的影响，并通过在胰蛋白酶溶液中的降解方法验证膜材的生物降解性。结果表明：角蛋白／CMCNa质量比5：5、尿素用量0．6％～0．8％、反应时间1h、反应温度37％时，复合膜致密均匀、拉伸强度适宜，断裂伸长率较大；含水率及透气率随尿素用量的增加呈现下降趋势；生物降解率达到35％以上；扫描电镜显示成膜状态良好；红外光谱与X-射线分析证明复合膜内部分子间存在强烈的相互作用，并出现新的结晶区域，结晶度较大。wool keratin/hydroxymethyl cellulose sodium（CMCNa）/urea composite membranes were prepared via cross linking modification technology. The effects of cross - linking agent on properties were critically investigated by means of orthogonal experiments and single factor contrast tests. Meanwhile, the biodegradability of composite films was verified by a degradation method in trypsin buffer solution. Experimental results indicate that the composite membranes with good tensile strength and larger elongation are compact, well -distributed and flexible under the following optimum conditions ：keratin/CMCNa weight ratio is 5：5 ;0. 6% 0. 8% urea, reaction time is 1 h, reaction temperature is 37 ℃. The MC and WVT shows a tendency of declining ultimately with the erosslinker content increasing. The degradation rate （DR）is over 35%. SEM images show that the composite membrane presents good compatibility, and FT - IR and X - ray analysis indicate that the strong interaction forms between molecules of raw materials and new crystalline areas with higher crystallinity exists in the composite membrane.

关 键 词：羊毛角蛋白 尿素 交联改性 复合膜 性能 

分 类 号：TS54[轻工技术与工程—皮革化学与工程]