Preparation of New Low-cost Porous Ceramic Membrane Support and Its Properties
TONG Zhi1, HUANG Kaipei1, YANG Bowen2, ZHANG Jianxu1
1 School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China 2 Xiamen Environmental Energy Investment and Development Co., LTD., Xiamen 361000, China
Abstract: The composite inorganic ceramic membrane supports with loess and fly ash as aggregate, carboxymethyl cellulose (CMC) as binder, methacrylic acid methyl ester (PMMA) as pore forming agent were prepared by extrusion-molding and solid particle sintering method. The effects of PMMA addition on the structure and properties of the support were systematically studied. The crystal phase, microscopic morphology, porosity, pore size distribution, flexural strength, acid-base corrosion rate and pure water permeability of ceramic supports were characterized by testing methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury intrusion method, three-point bending method, mass loss method, self-made pure water flux measurement device. Results indicate that with PMMA increasing, the porosity, pure water flux and acid-base corrosion rate increase gradually, and the flexural strength decrease gradually. The low-cost high-performance composite inorganic ceramic membrane support with pure water permeability of 3 165.13 L/(m2·h·MPa), porosity of 26.43%, average pore diameter of 4.88 μm, compressive strength of 27.33 MPa, and the acid/alkaline corrosion rate of 1.15%/1.10% can be fabricated under the optimized conditions: sintering temperature of 1 130 ℃, holding time of 2.5 h, PMMA addition of 8%.
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2021, Vol. 35 
