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Preparation of high-permeance ceramic microfiltration membranes using a pore-sealing method

机译：使用孔密封法制备高渗透陶瓷微滤膜

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摘要

A pore-sealing method for preparation of high-permeance alumina microfiltration (MF) membranes free of any intermediate layers is presented. It involves sequential coating of a polyvinyl butyral (PVB) layer and an alumina membrane precursor on the surface of the macroporous alumina support. An alumina MF membrane with no intermediate layers can be obtained on the support after pyrolysis of the PVB interlayer. The interlayer-free membrane prepared by this method has an average pore diameter of 0.26 μm and a water permeance of 1468 ± 81 L m ~(?2) h ~(?1) bar ~(?1) which is prominently higher than that of the ceramic membranes prepared with other techniques. The conspicuous increase of water permeance is speculated mainly due to the filtration resistance decrease of the interlayer-free ceramic membrane.
机译：提出了一种用于制备不含任何中间层的高渗透氧化铝微滤（MF）膜的孔密封方法。它涉及在大孔氧化铝载体的表面上依次涂覆聚乙烯丁醛（PVB）层和氧化铝膜前体。在PVB中间层的热解后，可以在载体上获得没有中间层的氧化铝MF膜。通过该方法制备的间隔式膜的平均孔径为0.26μm，水渗透率为1468±81μm〜（Δ2）H〜（α1）条〜（？1）突出高于此用其他技术制备的陶瓷膜。采用透析水渗透的显着提高主要是由于间隔式陶瓷膜的过滤性降低。

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