【作者】 张燕；

【导师】 陈宇岳；

【作者基本信息】 苏州大学 ， 纺织工程， 2009， 硕士

【摘要】 采用高碘酸钠选择性氧化亚麻纤维,将纤维素链单元的两个仲羟基氧化为醛基,由于氧化纤维素的醛基有直接和蛋白质发生交联的能力而制备了蛋白亚麻纤维,实现了亚麻纤维的蛋白化,在整个工艺工程中避免了使用化学交联剂,符合人们对绿色环保的要求。增加高碘酸钠浓度,延长氧化时间,提高氧化温度能增加亚麻纤维的醛基含量,但亚麻纤维的失重率增加,亚麻纤维的断裂强度降低。高碘酸钠选择性氧化后亚麻纤维大分子上生成了活性醛基,随着氧化程度的加深,纤维表面变得粗糙,结晶度不断降低。选用了丝胶、胶原两种蛋白对亚麻纤维进行改性处理,对丝胶蛋白亚麻纤维和胶原蛋白亚麻纤维的结构及性能进行了研究和表征。结果表明:不同处理条件对氧化亚麻纤维的增重率有一定的影响,但氧化亚麻纤维经蛋白溶液处理后的断裂强度和断裂伸长率基本不变。氧化亚麻纤维和蛋白之间形成了共价结合。氧化亚麻纤维经蛋白处理后表面变平整,结晶度无明显变化,而且蛋白亚麻织物的抗皱性能、吸水性能、紫外线防护功能等性能有所提高。更多还原

【Abstract】 In this paper, oxidation of cellulose with sodium periodate leads to yield a product with 2,3-dialdehyde cellulose. The aldehyde groups own the ability to crosslink with protein directly, therefore the protein flax fiber are successfully prepared. There is no chemical crosslinking reagents on the whole process, which can be in keeping with the need of people about greenness and environment protection.With enchancement of concentration of NaIO4, oxidized time and oxidized temperature, content of aldehyde groups increased. However, the weigh loss of flax fiber increased and breaking strength decreased. Oxidation of cellulose with sodium periodate yielded aldehyde groups. The surface of flax fiber became rough and crystallinity decreased while increasing oxidized degree of flax fiber.The structure and properties of the proteinic oxidized flax fiber were studied. The results showed that the weight gain of the oxidized flax fiber was affected by the concentration of protein solution, pH value, treated time and treated temperature. However, little change was found on the breaking strength and the breaking elongation of the oxidized flax fiber treated with protein. The covalent bonds occurred between the oxidized flax fiber and protein. The surface of oxidized flax fiber became smooth. The crystallinity changed little after treated with protein solution. Compared with original flax fabric, wrinkle resistance, water absorbency and anti-UV properties of protein flax fabric are promoted.更多还原