氧化铝陶瓷复合膜顶膜显微结构与渗透性能的可控制备
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摘要
以平均粒径为5μm的Al_2O_3粉为主要原料,采用注浆成型法,制备出膜支撑体。再结合浸渍法涂膜工艺,在上述膜支撑体上,采用Al_2O_3粉制备顶膜。为探究顶膜显微结构和渗透性能的可控制备工艺,实验考察了原料粒径对顶膜的厚度、孔径和水渗透通量的影响规律。实验结果表明:所制备的顶膜孔径分布窄,显微结构良好、均一无缺陷。采用不同粒径Al_2O_3粉制备的顶膜,其厚度可由18μm降低到11μm、最可几孔径则从120 nm减小到60 nm、水渗透通量由1894.60 L·m~(-2)·h~(-1)·bar~(-1)降低到1588.76 L·m~(-2)·h~(-1)·bar~(-1),从而实现了顶膜的显微结构和渗透性能的量化调控制备。
Alumina support was prepared by slip casting method using alumina of the average particle size of 5 μm as main material. Combined with dip coating process, the top membrane was prepared on the alumina support using alumina powders. In order to obtain the controlled preparation parameters of the microstructure and permeability of the top membrane, the effects of the particle size of raw material on the thickness, pore size and water permeate flux of the top membranes were studied. The results show the top membrane has a uniform microstructure and narrow pore size distribution. The thickness of the top film prepared with Al_2O_3 powder of different particle sizes reduces from 18 μm to 11 μm, and the most probable pore size decreases from 120 nm to 60 nm, and the water flux reduces from 1894.60 L·m~(-2)·h~(-1)·bar~(-1) to 1588.76 L·m~(-2)·h~(-1)·bar~(-1). The experimental results provide a controllable quantitative preparation method for the microstructure and permeability of the top membrane..
Alumina support was prepared by slip casting method using alumina of the average particle size of 5 μm as main material. Combined with dip coating process, the top membrane was prepared on the alumina support using alumina powders. In order to obtain the controlled preparation parameters of the microstructure and permeability of the top membrane, the effects of the particle size of raw material on the thickness, pore size and water permeate flux of the top membranes were studied. The results show the top membrane has a uniform microstructure and narrow pore size distribution. The thickness of the top film prepared with Al_2O_3 powder of different particle sizes reduces from 18 μm to 11 μm, and the most probable pore size decreases from 120 nm to 60 nm, and the water flux reduces from 1894.60 L·m~(-2)·h~(-1)·bar~(-1) to 1588.76 L·m~(-2)·h~(-1)·bar~(-1). The experimental results provide a controllable quantitative preparation method for the microstructure and permeability of the top membrane..
引文
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[4]丁文秀,周健儿,胡学兵,等.具有稳定显气孔率和渗透通量的氧化铝膜基片制备工艺优化[J].陶瓷学报,2015,36(4):371-375.DING W X,ZHOU J E,HU X B,et al.Journal of Ceramics,2015,36(4):371-375
[5]李梅,高能文,范益群.疏水陶瓷膜脱除油中水分的研究[J].膜科学与技术,2012,32(3):86-90.LI M,GAO N W,FAN Y Q.Membrane Science and Technology,2012,32(3):86-90.
[6]SHIRAZI S,LIN C J,CHEN D.Inorganic fouling of pressuredriven membrane processes;A critical review[J].Desalination,2010,250(1):236-248..
[7]潘林梅,黄敏燕,郭立玮.不同材质及孔径的无机陶瓷膜精制黄芪水提液[J].膜科学与技术,2013,33(1):71-75.PAN L M,HUANG M Y,HAN L W.Membrane Science and Technology,2013,33(1):71-75.
[8]秦伟伟,宋永会,肖书虎,等.陶瓷膜在水处理中的发展与应用[J].工业水处理,2011,31(10):15-19.QIN W W,SONG Y H,XIAO S H,et al.Industrial Water Treatment,2011,31(10):15-19.
[9]聂燕中,聂朝胤,赵洋,等.Si O2预涂层对Ti O2多层膜结构与亲水性能的影响[J].功能材料,2015,46(7):7086-7089.NIE Y Z,NIE C Y,ZHAO Y,et al.Journal of Functional Materials,2015,46(7):7086-7089.
[10]周健儿,吴建青,汪永清,等.纳米Ti O2涂层对Al2O3微滤膜的改性研究[J].无机材料学报,2006,21(3):725-730.ZHOU J E,WU J Q,WANG Y Q,et al.Journal of Inorganic Materials,2006,21(3):725-730.
[11]漆虹,邢卫红,范益群.低温烧成高纯Al2O3多孔陶瓷膜支撑体的制备[J].硅酸盐学报,2010,38(2):283-288.QI H,XING W H,FAN Y Q.Journal of the Chinese Ceramic Society2010,38(2):283-288.