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Sulfonated poly(styrene-isobutylene-styrene) grafted with hexyl- and butyl-imidazolium chloride ionic liquids
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2021-07-01 , DOI: 10.1002/pol.20210214 Karen Barrios‐Tarazona 1 , David Suleiman 1
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2021-07-01 , DOI: 10.1002/pol.20210214 Karen Barrios‐Tarazona 1 , David Suleiman 1
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In this work, novel sulfonated poly(ionic liquid)s block-copolymers based on poly(styrene–isobutylene–styrene) (SIBS) are synthesized for chemical protective clothing (CPC) applications. The synthesis consists of the chloromethylation of SIBS, followed by the incorporation of N-alkylimidazole through chemical grafting, and concluding with sulfonation of the resulting compound. Properties of the membranes are determined as a function of different N-alkylimidazoles (butylimidazole and hexylimidazole) and sulfonation levels (7–23 mol%). Results show that the incorporation of imidazole and sulfonic groups increases the thermal stability of SIBS as well as its water absorption capabilities. The interaction between the ionic moieties in the polymeric matrix allows the formation of hydrophilic nanochannels, which promote the transport of permeants through the membrane. The high water vapor transmission rate (above 2000 g m−2 day−1) and values of selectivity (~50) demonstrate that the breathability of the synthesized membrane is improved while blocking the passage of dimethyl methylphosphonate (simulant of agent Sarin). The above mentioned observations suggest that sulfonated SIBS-PIL's membranes are potential materials for CPC applications.
中文翻译：
用己基和丁基咪唑氯化物离子液体接枝的磺化聚（苯乙烯-异丁烯-苯乙烯）
在这项工作中，合成了基于聚（苯乙烯-异丁烯-苯乙烯）（SIBS）的新型磺化聚（离子液体）嵌段共聚物，用于化学防护服（CPC）应用。合成包括 SIBS 的氯甲基化，然后通过化学接枝掺入 N-烷基咪唑，最后将所得化合物磺化。膜的特性被确定为不同 N-烷基咪唑（丁基咪唑和己基咪唑）和磺化水平（7-23 mol%）的函数。结果表明，咪唑和磺酸基团的引入提高了SIBS的热稳定性及其吸水能力。聚合物基质中离子部分之间的相互作用允许形成亲水性纳米通道，促进渗透物通过膜的运输。高水蒸气透过率（2000 g m 以上）-2 天-1 ) 和选择性值 (~50) 表明合成膜的透气性得到改善，同时阻止甲基膦酸二甲酯（沙林毒剂的模拟物）通过。上述观察表明磺化 SIBS-PIL 的膜是 CPC 应用的潜在材料。
更新日期：2021-09-01
中文翻译：
用己基和丁基咪唑氯化物离子液体接枝的磺化聚（苯乙烯-异丁烯-苯乙烯）
在这项工作中，合成了基于聚（苯乙烯-异丁烯-苯乙烯）（SIBS）的新型磺化聚（离子液体）嵌段共聚物，用于化学防护服（CPC）应用。合成包括 SIBS 的氯甲基化，然后通过化学接枝掺入 N-烷基咪唑，最后将所得化合物磺化。膜的特性被确定为不同 N-烷基咪唑（丁基咪唑和己基咪唑）和磺化水平（7-23 mol%）的函数。结果表明，咪唑和磺酸基团的引入提高了SIBS的热稳定性及其吸水能力。聚合物基质中离子部分之间的相互作用允许形成亲水性纳米通道，促进渗透物通过膜的运输。高水蒸气透过率（2000 g m 以上）-2 天-1 ) 和选择性值 (~50) 表明合成膜的透气性得到改善，同时阻止甲基膦酸二甲酯（沙林毒剂的模拟物）通过。上述观察表明磺化 SIBS-PIL 的膜是 CPC 应用的潜在材料。
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