盐酸胍对皮胶原纤维干热收缩行为的影响及其可逆性  

Influence of Guanidine Hydrochloride on Dry Heat Shrinkage Behaviors of Collagen Fibers

作　　者：王芳[1] 汤克勇[1] 潘洪波[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450052

出　　处：《中国皮革》2011年第13期17-20,24,共5页China Leather

基　　金：国家自然科学基金(No.50973097);河南省高校科技创新人才支持计划(2009HASTIT015)资助项目

摘　　要：以盐酸胍为改性剂,将皮胶原纤维在不同浓度盐酸胍溶液处理不同的时间后,研究了盐酸胍处理前后皮胶原纤维的干热收缩行为及其变化规律。研究发现:盐酸胍处理后皮胶原纤维的干热收缩温度明显降低,且随所用盐酸胍浓度的增大干热收缩温度逐渐减小,直至平衡,平衡时试样的收缩温度在120℃左右;其干热收缩率则随盐酸胍浓度的增大而先增大后减小。经过盐酸胍处理后,皮胶原纤维的结构变得不稳定,可以为以后其它材料渗透到皮胶原纤维内与皮胶原纤维间发生相互作用,创造必要的条件。Collagen fibers were processed in guanidine hydrochloride solutions of different concentrations, and the dry heat shrinkage behaviors of the collagen fibers were studied by thermal platform microscope. It was indicated that the dry heat shrinkage temperature of the samples was obviously decreased by the guanidine hydrochloride process. It decreased with increasing the guanidine hydrochloride concentrations to reach equilibrium, around 120℃. With increasing the guanidine hydrochloride concentration, the dry heat shrinkage ratio of collagen fibers was increased firstly, followed by a decreasing. There is no chemical reaction between collagen fibers and guanidine hydrochloride. Only a physical action exists between collagen fibers and guanidine hydrochloride. It is reversible. Guanidine hydrochloride process may destroy the original hydrogen bonds in collagen fibers and change their aggregation structure. After guanidine hydrochloride process, the collagen structure is unstable, which may help the penetra-ion and combination of leather chemicals with the collagen fibers in leather making.

关 键 词：盐酸胍 皮胶原纤维 干热收缩 氢键 

分 类 号：TS51[轻工技术与工程—皮革化学与工程]