Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
ACS Appl Mater Interfaces. 2013 Aug 14;5(15):7001-6. doi: 10.1021/am401163h. Epub 2013 Aug 5.
We fabricated block copolymer hollow fiber membranes with self-assembled, shell-side, uniform pore structures. The fibers in these membranes combined pores able to respond to pH and acting as chemical gates that opened above pH 4, and catalytic activity, achieved by the incorporation of gold nanoparticles. We used a dry/wet spinning process to produce the asymmetric hollow fibers and determined the conditions under which the hollow fibers were optimized to create the desired pore morphology and the necessary mechanical stability. To induce ordered micelle assembly in the doped solution, we identified an ideal solvent mixture as confirmed by small-angle X-ray scattering. We then reduced p-nitrophenol with a gold-loaded fiber to confirm the catalytic performance of the membranes.
我们制备了具有自组装、壳侧、均匀孔径结构的嵌段共聚物中空纤维膜。这些膜中的纤维结合了能够响应 pH 值并充当化学门的孔，其在 pH 值高于 4 时打开，并通过掺入金纳米粒子实现了催化活性。我们使用干/湿法纺丝工艺生产不对称中空纤维，并确定了使中空纤维优化以产生所需孔形态和必要机械稳定性的条件。为了在掺杂溶液中诱导有序胶束组装，我们通过小角 X 射线散射确认了理想的溶剂混合物。然后，我们用负载金的纤维还原对硝基苯酚，以确认膜的催化性能。
