Chen Likan, Guan Kang, Zhu Weiya, Peng Cheng, Wu Jianqing
School of Materials Science and Engineering, South China University of Technology Guangzhou 510640 People's Republic of China.
RSC Adv. 2018 Nov 29;8(70):39884-39892. doi: 10.1039/c8ra07258b. eCollection 2018 Nov 28.
A spray coating method was proposed to fabricate an α-AlO 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 h bar. 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.
提出了一种喷涂方法来制备具有优异性能的α-AlO微滤膜。观察到在涂覆阶段支撑体内部会形成气隙，这有效地防止了成膜颗粒在没有中间层的情况下渗透到支撑体中。因此，平均孔径为0.13μm、厚度为25.46μm的膜的纯水通量可达2893 Lm h bar。研究了焙烧条件、膜厚度以及反冲洗或反脉冲条件对膜孔径分布的影响。同时，制备的膜在8 bar的跨膜压力（TMP）下进行反脉冲和反冲洗过程中能够保持良好的过滤性能和机械完整性，对平均粒径为164 nm的碳墨的截留率也达到了98.8%。
