Synthesis of emulsion-templated porous polyacrylonitrile and its pyrolysis to porous carbon monoliths
Synthesis of emulsion-templated porous polyacrylonitrile and its pyrolysis to porous carbon monoliths
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DOI：
10.1016/j.polymer.2010.11.026
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发表时间：
2011-01-21
期刊：
影响因子：
4.6
通讯作者：
Silverstein, Michael S.
中科院分区：
文献类型：
--
作者：
Cohen, Noa;Silverstein, Michael S.
聚HIPE是在高内相乳液（HIPE）中合成的乳液模板聚合物。丙烯腈（AN）与水的互溶性使得PAN基聚HIPE的合成变得困难。本文介绍了成功的PAN基聚HIPE的合成通过与二乙烯基苯（DVB）的共聚交联，通过稳定与聚甘油聚蓖麻油酸酯表面活性剂，并通过引发与油溶性和水溶性引发剂。PAN基聚HIPE的孔隙率超过86%，具有不同于典型聚HIPE的孔结构。本文还描述了通过这些PAN基聚HIPE的热解生产多孔碳整体。热解没有产生显着的变化，在多孔结构，这是非常相似的原始polyHIPES。孔隙率为约95%，并且碳整料主要是大孔和中孔的，具有一些微孔。这些结果表明，PAN基聚HIPE模板可以用于多孔碳整体的先验设计。(C)2010爱思唯尔有限公司版权所有。
PolyHIPEs are emulsion-templated polymers synthesized within high internal phase emulsions (HIPEs). The miscibility of acrylonitrile (AN) with water has made it difficult to synthesize PAN-based polyHIPEs. This paper describes the successful synthesis of PAN-based polyHIPEs by crosslinking through copolymerization with divinylbenzene (DVB), by stabilization with a polyglycerol polyricinoleate surfactant, and by initiation with both oil- and water-soluble initiators. The PAN-based polyHIPEs had porosities of over 86% and porous structures that were different from those of typical polyHIPEs. This paper also describes the production of porous carbon monoliths through the pyrolysis of these PAN-based polyHIPEs. Pyrolysis did not produce significant changes in the porous structures, which were quite similar to those of the original polyHIPEs. The porosities were around 95% and the carbon monoliths were largely macroporous and mesoporous, with some microporosity. These results indicate that PAN-based polyHIPE templates can be used for the a priori design of porous carbon monoliths. (C) 2010 Elsevier Ltd. All rights reserved.