Preparation and mechanism analysis of high performance ceramic membrane by spray coating.
Preparation and mechanism analysis of high performance ceramic membrane by spray coating.
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喷涂高性能陶瓷膜的制备及机理分析
DOI：
10.1039/c8ra07258b
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发表时间：
2018-11-28
期刊：
影响因子：
3.9
通讯作者：
Wu, Jianqing
中科院分区：
文献类型：
--
作者：
Chen, Likan;Guan, Kang;Zhu, Weiya;Peng, Cheng;Wu, Jianqing
采用喷涂法制备了性能优良的α-Al 2 O3微滤膜。观察到，在涂覆阶段期间，可在载体内部形成空气间隙，其有效地防止成膜颗粒在没有中间层的情况下渗透到载体中。因此，平均孔径为0.13 μm，厚度为25.46 μm的膜的纯水渗透率可以达到2893 Lm-2 h-1 bar-1。考察了焙烧条件、膜厚度、脉冲或反脉冲条件对膜孔径分布的影响。在8 bar的跨膜压力下，该膜在反冲洗过程中保持了良好的过滤性能和机械完整性，对平均粒径为164 nm的炭墨的截留率为98.8%。研制了一种高性能陶瓷膜。我们发现并解释了喷涂减少颗粒渗透的效果。
A spray coating method was proposed to fabricate an α-Al2O3 micro-filtration membrane with excellent performance. It was observed that air gaps could form inside the support during the coating stage that effectively prevent membrane forming particles from penetrating into the support without an intermediate layer. Thus the pure water permeability of the membrane with average pore size of 0.13 μm and thickness of 25.46 μm could reach 2893 Lm−2 h−1 bar−1. The effects of firing conditions, membrane thickness and backwash or backpulse conditions on the pore size distribution of the membrane were investigated. Meanwhile the prepared membrane could sustain good filtration performance and mechanical integrity during backpulsing and backwashing processes under the transmembrane pressure (TMP) of 8 bar, which also exhibited a rejection rate of 98.8% for the carbon ink with an average particle size of 164 nm. We have fabricated a high performance ceramic membrane. We find and explain the effect of reducing particle penetration by spray coating.
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