聚醚砜

Abstract(#br)A new membrane is developed, which is composed of highly crosslinked polydimethylsiloxane as the active layer on a support layer containing polyethersulfone and an appropriate additive (polyvinylpyrrolidone or polyethyleneglycol). The effect of porosity of the support layer on the performance of the fabricated membrane for pervaporative removal of toluene as a representative volatile organic compound from water is then studied. The support layer represents high porosity to improve the permeation rate of the composite membrane while it preserves the reasonable enrichment factor.

油水分离技术在这些年来一直在不断进步。近来，重力辅助过滤得到了相当多的关注，尽管大部分研究集中在重力作用下容易分离的油水合成混合物。对于机械稳定和化学稳定的乳状液，除静态重力头外，不需要外加外部压力就可以分离是一个挑战。要实现这一目标，过滤介质应具有高孔隙率，以获得高通量，但要控制孔径，以获得高选择性。而且，为了分解乳液，过滤介质表面应赋予超润湿特性。本文综合评述了不同的多孔过滤介质(金属网、有机膜、无机膜、滤纸和三维材料)及其相应的改性技术和/或功能化策略，以改善其性能，实现高效重力驱动过滤应用。