Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str. 1, 21502, Geesthacht, Germany.
Macromol Rapid Commun. 2013 Apr 12;34(7):610-5. doi: 10.1002/marc.201200770. Epub 2013 Feb 7.
The formation of integral asymmetric membranes from ABC triblock terpolymers by non-solvent-induced phase separation is shown. They are compared with the AB diblock copolymer precursors. Triblock terpolymers of polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) (PS-b-P2VP-b-PEO) with two compositions are investigated. The third block supports the formation of a membrane in a case, where the corresponding diblock copolymer does not form a good membrane. In addition, the hydrophilicity is increased by the third block and due to the hydroxyl group the possibility of post-functionalization is given. The morphologies are imaged by scanning electron microscopy. The influence of the PEO on the membrane properties is analyzed by water flux, retention, and dynamic contact angle measurements.
展示了通过非溶剂致相分离从 ABC 三嵌段共聚物形成整体不对称膜。将它们与 AB 二嵌段共聚物前体进行了比较。研究了两种组成的聚苯乙烯嵌段-聚（2-乙烯基吡啶）嵌段-聚（氧化乙烯）（PS-b-P2VP-b-PEO）三嵌段共聚物。在第三种嵌段支持形成膜的情况下，相应的二嵌段共聚物不能形成良好的膜。此外，亲水性通过第三嵌段增加，并且由于羟基，赋予了后功能化的可能性。通过扫描电子显微镜对形态进行成像。通过水通量、保留率和动态接触角测量分析了 PEO 对膜性能的影响。
