Hierarchically Porous Polymer Monoliths by Combining Controlled Macro- and Microphase Separation
Hierarchically Porous Polymer Monoliths by Combining Controlled Macro- and Microphase Separation
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DOI：
10.1021/jacs.5b04992
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发表时间：
2015-07-22
影响因子：
15
通讯作者：
Hillmyer, Marc A.
中科院分区：
文献类型：
--
作者：
Saba, Stacey A.;Mousavi, Maral P. S.;Hillmyer, Marc A.
在多个长度尺度上调节聚合物整料孔隙率的能力对于液体分离、催化和生物工程中的应用是期望的。为此，我们已经开发了一种简便的合成路线：纳米多孔聚合物整料的基础上控制聚合的苯乙烯和二乙烯基苯从聚（丙交酯）的大链转移剂在非反应性聚（环氧乙烷）（PEO）的存在下。PEO的体积分数和/或摩尔质量的简单变化导致聚合诱导的微相分离或同时的宏观和微相分离。这些过程决定了所得的形态，并允许控制整料的宏观和微观结构。随后的选择性蚀刻产生具有可以从控制中孔尺寸的中孔到分级的中孔和大孔的大孔的形态的整料。这种方便的多孔聚合物整料的合成路线具有在需要快速传质和高表面积的应用中有用的潜力。
The ability to tune polymer monolith porosity on multiple length scales is desirable for applications in liquid separations, catalysis, and bioengineering. To this end, we have developed a facile synthetic route :to nanoporous polymer monoliths based on controlled polymerization of styrene and divinylbenzene from a poly(lactide) macro-chain transfer agent in the presence of nonreactive poly(ethylene oxide) (PEO). Simple variations in the volume fraction and/or molar mass of PEO lead to either polymerization-induced microphase separation or simultaneous macro- and microphase separation. These processes dictate the resultant morphology, and allow, for control of the macro- and microstructure of the monoliths. Subsequent selective etching produces monoliths with morphologies that can be tailored from mesoporous, with control over mesopore size, to hierarchically, meso- and macroporous, with percolating macropores. This convenient synthetic route to porous polymer monoliths has the potential to be useful in applications where both rapid mass transport and a high surface area are required.