Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
Science. 2012 Jun 15;336(6087):1422-5. doi: 10.1126/science.1221383.
Materials with percolating mesopores are attractive for applications such as catalysis, nanotemplating, and separations. Polymeric frameworks are particularly appealing because the chemical composition and the surface chemistry are readily tunable. We report on the preparation of robust nanoporous polymers with percolating pores in the 4- to 8-nanometer range from a microphase-separated bicontinuous precursor. We combined polymerization-induced phase separation with in situ block polymer formation from a mixture of multifunctional monomers and a chemically etchable polymer containing a terminal chain transfer agent. This marriage results in microphase separation of the mixture into continuous domains of the etchable polymer and the emergent cross-linked polymer. Precise control over pore size distribution and mechanical integrity renders these materials particularly suited for various advanced applications.
具有贯穿中孔的材料在催化、纳米模板和分离等应用中具有吸引力。聚合框架特别有吸引力，因为其化学成分和表面化学性质很容易调节。我们报告了从微相分离的双连续前体中制备具有 4 到 8 纳米贯穿孔的坚固纳米多孔聚合物。我们将聚合诱导相分离与原位嵌段聚合物形成相结合，该嵌段聚合物由多功能单体混合物和含有末端链转移剂的可化学刻蚀聚合物组成。这种结合导致混合物的微相分离成可刻蚀聚合物和新生成的交联聚合物的连续域。对孔径分布和机械完整性的精确控制使得这些材料特别适合各种先进的应用。
