聚乙烯醇基强碱性阴离子交换纤维制备和性能

Study on Preparation and Properties of Polyvinyl Alcohol Based Alkali Anion Exchange Fiber

聚乙烯醇（PVA）纤维经过碳化脱水反应形成多烯化纤维，随后功能化反应制备强碱性阴离子交换纤维。讨论了碳化反应气氛、温度、时间对碳化纤维失量率和机械强度的影响以及失量率、醚化反应和胺化反应条件对产品交换容量的影响，并通过一系列手段对其进行表征。结果表明氮气气氛可以有效保护碳化纤维的力学性能，当失量率为10％～15％时，制备的强碱性阴离子交换纤维交换容量达2．0mmol·g^-1，具有较快的吸附性能和较好的力学性能。

The strong alkali anion exchange fiber were prepared by the dehydration reaction of polyvinyl alcohol （PVA） fiber followed by etherisation reaction and amination reaction. The paper studied the effects of dehydration atmosphere, temperature and time on dehydration reaction and the effects of mass loss, temperature, time of etherisation and amination reaction on exchange capacities. IR, XRD and determinations of titration curve, absorption dynamics, and mechanical strength have been used to characterize the structure and appearance of PVA anion exchange fiber. The results show that nitrogen atmosphere can effective protect the mechanical property of fiber. When the mass loss rate of dehydration reaction was 10%-15%, the exchange capacity of strong alkali anion exchange fiber was 1.9-2.4 mmol·g^-1 and the fiber had a high exchange capacity, quick adsorption velocity and finer mechanical capability.