INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Effect of Pore Former CMC on Support of Fly Ash-based Ceramic Membrane and Analysis of Coating |
TONG Zhi1,*, LI Yan1, YAN Xiao1, DONG Qi2, ZOU Yu2, JI Haojiang1
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1 School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China 2 Shanxi Science and Technology Industrial Research Institute Co., Ltd., Xi'an 710048, China |
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Abstract In order to effectively reuse industrial waste, a fly ash-based porous ceramic membrane carrier added with carboxymethyl cellulose (CMC) was prepared. The effect of the addition of CMC on the performance of the support was studied. Al2O3 sol was prepared added with dispersant HNO3 and peptizer methyl cellulose (MC), used immersion pulling method and solid particle sintering method for coating. The main influencing factors of the stability of the membrane liquid and the coating process were analyzed. The results showed that as the CMC increased from 0% to 7%, the porosity of the support increased from 32% to 47%, the flexural strength decreased from 50.76 MPa to 30.79 MPa, and the acid-base mass loss rate decreased, with a minimum of 0.47/0.36%. When the pH was 2—4 and the MC addition was 20%, a stable, colorless and transparent Al2O3 sol was obtained with a viscosity of 1.68 mPa·s. When the sol viscosity was 1.6—2.2 mPa·s, the immersion time was 30 s, and the film is coated 3 times, a uniform, continuous and high-density film was obtained.
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Published:
Online: 2023-01-03
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Fund:Key Research and Development Projects of Shaanxi Provincial Science and Technology Department(2018ZDXM-SF-094,2020GY-325,2020SF-410). |
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