Peinemann Klaus-Viktor, Abetz Volker, Simon Peter F W
Institut für Polymerforschung, GKSS-Forschungszentrum Geesthacht GmbH, Max-Planck-Strasse 1, 21502 Geesthacht, Germany.
Nat Mater. 2007 Dec;6(12):992-6. doi: 10.1038/nmat2038. Epub 2007 Nov 4.
Self-assembly of amphiphilic block copolymers into well-ordered structures has attracted significant interest over the past decade. An especially attractive application of block-copolymer self-assembly is the formation of isoporous membranes. A major problem in this process is the lack of sufficient long-range order and the difficulty of up-scaling due to the time-consuming preparation steps. Here, we report an innovative and simple method to prepare isoporous membranes with nanometre-sized pores. The combination of the industrially well-established membrane formation method by non-solvent-induced phase separation with the self-assembly of a block copolymer is demonstrated. The result is the creation of an integral asymmetric membrane of a block copolymer with a highly ordered thin layer on top of a non-ordered sponge-like layer. This straightforward and very fast one-step procedure for membrane formation is reported for the first time. The developed membrane has the potential for highly selective separation.
在过去十年中，两亲性嵌段共聚物自组装成有序结构引起了广泛关注。嵌段共聚物自组装的一个特别有吸引力的应用是形成等孔膜。这个过程中的一个主要问题是缺乏足够的长程有序性，以及由于制备步骤耗时导致难以扩大规模。在此，我们报道了一种创新且简单的方法来制备具有纳米级孔径的等孔膜。展示了工业上成熟的非溶剂诱导相分离成膜方法与嵌段共聚物自组装的结合。结果是形成了一种嵌段共聚物整体不对称膜，在无序的海绵状层之上有一个高度有序的薄层。首次报道了这种直接且非常快速的一步成膜方法。所开发的膜具有高选择性分离的潜力。
