Macroporous poly(ionic liquid)/ionic liquid gels via CO2-based emulsion-templating polymerization†,Polymer Chemistry

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Macroporous poly(ionic liquid)/ionic liquid gels via CO2-based emulsion-templating polymerization†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7py01952a
Kevin Mathieu _{1,

2,

3,

4,

5} , Christine Jérôme _{1,

2,

3,

4,

5} , Antoine Debuigne _{1,

2,

3,

4,

5}

Affiliation

Structuring poly(ionic liquid)s (PILs) into porous materials or swelling PILs with free ionic liquids (ILs) has received specific attention recently and contributed to the improvement of the performances of these materials used in a wide range of applications. The present work aims to take advantage of both approaches and produce macroporous PIL/IL gels in a single step through an innovative emulsion-templated polymerization method based on supercritical carbon dioxide (scCO₂). More precisely, IL vinyl monomers and crosslinkers were polymerized in the presence of non-polymerizable ILs within the outer phase of a CO₂-in-IL high internal phase emulsion (HIPE). Specific macromolecular surfactants were synthesized using controlled radical polymerization techniques and tested for the stabilization of the CO₂-in-IL emulsions. While optimizing the polymerization conditions, we found that adding a limited amount of water in the medium was beneficial for the emulsion stability. Overall, this straightforward process provided access to macroporous polyHIPEs composed of poly(vinyl imidazolium) networks swollen by ‘free’ vinyl imidazolium-based ILs having interesting properties such as switchable polarity upon a simple anion exchange reaction.

中文翻译：

通过基于CO ₂的乳液模板聚合法制备的大孔聚（离子液体）/离子液体凝胶†

近来，将聚离子液体（PIL）结构化成多孔材料或用游离离子液体（ILs）溶胀PIL受到了特别的关注，并有助于改善这些材料在广泛应用中的性能。本工作旨在利用这两种方法，并通过基于超临界二氧化碳（scCO ₂）的创新乳液模板聚合方法，一步一步生产大孔PIL / IL凝胶。更精确地，IL乙烯基单体和交联剂在CO ₂外相内存在不可聚合的IL的情况下进行聚合IL高内相乳液（HIPE）。使用受控的自由基聚合技术合成了特定的大分子表面活性剂，并测试了IL ₂中CO ₂ -in乳液的稳定性。在优化聚合条件的同时，我们发现在介质中添加有限量的水有利于乳液的稳定性。总的来说，这种简单的方法使人们可以使用由聚乙烯基咪唑基的IL溶胀的，具有聚乙烯基咪唑基的大孔聚HIPE，该基团具有有趣的特性，例如在简单的阴离子交换反应中可转换的极性。

更新日期：2017-12-13

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