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以3-氯-2-羟丙基三甲基氯化铵为醚化剂,在碱性条件下使聚乙烯醇发生季铵化反应。利用ATR-FTIR表征了产物结构,考察了碱与醚化剂的比例、反应温度、反应时间对季铵化聚乙烯醇膜离子交换容量数值的影响,初步提出了KOH在聚乙烯醇季铵化过程中的作用机理。通过对样品的XRD、FTIR谱图分析,解释了季铵化聚乙烯醇经长时间干燥不能完全溶解的原因。研究出高离子交换容量季铵化聚乙烯醇的最佳合成条件。采用季铵化聚乙烯醇铸膜液与戊二醛交联,制备得到具有较高离子交换容量的季铵化聚乙烯醇膜。
Using 3-chloro-2-hydroxypropyltrimethylammonium chloride as etherification agent, quaternization of polyvinyl alcohol occurred under alkaline conditions. The structure of the product was characterized by ATR-FTIR. The influence of the ratio of base to etherifying agent, reaction temperature and reaction time on the ion exchange capacity of quaternized PVA was investigated. The mechanism of action in the process. The XRD and FTIR spectra of the samples were used to explain the reason why the quaternized polyvinyl alcohol could not be completely dissolved after prolonged drying. The optimum synthesis conditions of quaternary ammonium polyvinylalcohol with high ion exchange capacity were studied. Using quaternized polyvinyl alcohol casting solution and glutaraldehyde crosslinking, prepared with higher ion exchange capacity quaternized polyvinyl alcohol film.