Water absorptive polymer materials made from abolishing wool and the interaction with water

为了使资源回收作为废毛功能材料的最终目的，对琥珀酸化添加吸水剂进行了研究。在本研究中，利用羊毛纤维还原增溶得到的角蛋白在均相体系中进行琥珀酸化反应，成功地得到了29.6%的琥珀酸化角蛋白，高于常规多相体系的结果。研究了丁二酸化角蛋白与乙二醇二缩水甘油醚、山梨醇聚缩水甘油醚、二甘油聚缩水甘油醚和NK催化剂四种多官能团环氧化物进行不溶化反应的最佳条件。丁二酸化后用乙二醇二缩水甘油醚溶解的角蛋白衍生物的吸水率最高(25g/g)。在非均相体系中，部分水解或还原后的琥珀酸化也可使羊毛纤维具有较高的吸水率，尽管这些工艺比上述工艺简单。部分水解/琥珀酸化羊毛和还原/琥珀酸化羊毛表现出较高的吸湿性，特别是在相对湿度大于70%的高湿度条件下，这两种处理都显着增加了纤维中的非冻水含量。经琥珀酸化处理后的羊毛纤维结晶度比处理前明显降低，说明处理后羊毛纤维的结晶区和非晶区都发生了琥珀酸化。琥珀酸化后的吸水率、吸湿性和非冰冻水含量增加，说明琥珀酸化后羧基的富集度对这些性能有很大影响。

In making the resource recycling as a functional material of abolishing wool to be final purpose, the addition of water-absorbability by succinylation has been studied. In this study, by the succinylation in homogeneous system using keratein obtained by reductively solubilization of wool fibers, it succeeded in getting succinylated keratein of add-ons of 29.6%, which is higher than the case by the conventional heterogeneous system. Sought were the optimum conditions for insolubilization by cross-linking of the succinylated keratein with four multifunctional epoxides, ethyleneglycol diglycidyl ether, sorbitol polyglycidyl ether, diglycerol polyglycidyl ether and NK catalyst A. The keratein derivative which was succinylated and insolubilized using ethyleneglycol diglycidyl ether, showed the highest water absorbance (25g/g) in the examined keratein derivatives. Partial hydrolysis or reduction followed by succinylation in a heterogeneous system also gave high water absorbability to wool fibers, though these processes are simpler than the above ones. Partially hydrolyzed/succinylated wool and reduced/succinylated wool shows high hygroscopicity especially under the high humidity conditions over ca. 70%RH and both these treatments remarkably increased quantity of non-freezing water in the fibers. Crystallinity decreased more significantly after succinylation than the pretreatments, which shows that the crystalline region of the pretreated wool fibers was succinylated as well as the amorphous region. The water absorbability, hygroscopicity and quantity of non-freezing water increased after succinylation, which suggests that enrichment of carboxyl group by succinylation influences strongly on these properties.