【作者】 许云辉；

【导师】 白伦； 陈宇岳；

【作者基本信息】 苏州大学 ， 纺织工程， 2006， 博士

【摘要】 传统的改性技术在赋予棉纤维功能的同时,对生态环境和人体健康危害严重,很难达到当今倡导的绿色生产与生态纺织品的标准。因此,改革传统的棉纤维改性技术,开发对环境无污染的棉纤维绿色改性技术已成为棉纤维研究领域中的热点课题。通过绿色技术改性棉纤维得到生态环保的功能棉纤维产品被誉为环境友好型功能棉纤维。本论文主要是在棉纤维分子中生成活性的醛基基团,在不使用任何交联剂或其它化学添加剂的条件下,利用醛基与胶原蛋白、壳聚糖分子上的氨基直接交联反应来制备绿色功能材料涂覆的棉纤维,解决了传统改性方法中采用化学交联剂而带来的负面影响,使棉纤维的绿色改性成为可能。本论文首先采用了高碘酸钠对棉纤维进行选择性氧化,使棉纤维分子中的葡萄糖基环上C2、C3位的两个相邻仲羟基氧化为醛基,研究了这种选择性氧化方法对棉纤维结构与性能的影响。在此基础上制备了强伸力保持率大于75%的载体棉纤维(是指既具有一定服用强伸力,又含有活性醛基的氧化棉纤维,可作为与其它含有-NH2等活性基团的绿色功能材料直接反应的理想载体,定义为载体棉纤维,简称CCF)。研究发现:棉纤维经高碘酸钠选择性氧化后产生失重,在高碘酸钠选择性氧化过程中始终伴随着棉纤维的降解。高碘酸钠局部有限选择性氧化后,棉纤维结晶度随着氧化剂浓度的降低而有所提高,深度氧化的棉纤维结晶度下降,且深度氧化后棉纤维结晶晶型从纤维素Ⅰ逐渐向无定形转变。高碘酸钠深度氧化后棉纤维的热分解起始点温度与醛基含量具有显著的负线性相关关系,FTIR、XPS结果显示高碘酸钠选择性氧化后棉纤维分子的葡萄糖基环上生成了活性醛基基团。制备载体棉纤维(CCF)工艺为:反应温度为55~60℃、氧化时间为1h、高碘酸钠浓度为0.0~2.0g/L,在此工艺条件下制得的载体棉纤维(CCF)的强伸力保持率大于75%,最大醛基含量达0.091mmol/g。论文采用了高碘酸钠对棉纤维进行选择性氧化使棉纤维产生卷曲收缩这一特点,制备了弹力棉纤维(Elasticity Cotton Fiber,简称ECF)。研究发现:棉纤维更多还原

【Abstract】 Cotton fiber is endowed with function by traditionally modified technology, while harming seriously to the environment and the health, and not reaching the standard of green production process and ecological textiles. Therefore, the innovation on the traditional technology to develop green technology for cotton fiber with non-pollute to the environment is a hot research pot in cotton fiber fields.Functional cotton fiber modified with green technology is named eco-friendly functional cotton fiber. In this paper, the active aldehyde groups in molecule of cotton fiber are created, which can crosslink with amide in molecule of collagen and chitosan without chemical crosslinking reagents or additives to prepare eco-friendly functional cotton fiber, which can solve the disadvantages to natural cotton fiber and make green modification technology of cotton fiber feasible.Firstly, cotton fiber is selectively oxidized with NaIO4, and hydroxy groups of C2, C3 in glucose units of cotton fiber are oxidized to aldehyde groups, The structure and properties of cotton fiber selectively oxidised with NaIO4 are studied and Carrier Cotton Fiber is prepared with strength and elongation keeping 75% (The oxidized cotton fiber has some extent strength and contains active aldehyde groups,and is an ideal carrier which can crosslink with green functional materials containing -NH2 groups, and is named Carrier Cotton Fiber or CCF). The results show that cotton fiber oxidized with NaIO4 has weight loss and is degraded during the oxidation reaction. The crystallinity of cotton fiber oxidized limitedly increases little, however, the crystallinity of cotton fiber oxidized severely decreases and change from celluloseⅠto amorphism. The negative correlation between the initial peak temperature and aldehyde group content is evident, and aldehyde groups in glucose units of cotton fiber oxidized selectively are created through FTIR and XPS analysis. Carrier Cotton Fiber is prepared at temperature 55~60℃, oxidation time 1h,更多还原