Preparation of Carboxylated Titanium Dioxide/Calcium Alginate Hydrogel Filtration Membrane with Anti-Fouling Property for Dye Rejection

被引：0
|
作者：
Wang X. [1 ,2 ,3 ,4 ]
Wang L. [1 ,2 ]
Zhao K. [2 ,4 ]
Kong Z. [1 ,2 ,3 ,4 ]
Wei J. [2 ,4 ]
Deng H. [1 ]
机构：
[1] School of Environmental Science and Engineering, Tiangong University, Tianjin
[2] State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin
[3] Tianjin Engineering Center for Safety Evaluation of Water Quality & Safeguards Technology, Tianjin
[4] Key Laboratory of Textile Materials for Soil Treatment in Textile Industry, Tianjin
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2020年 / 36卷 / 12期
关键词：
Anti-fouling; Calcium alginate; Carboxylated titanium dioxide; Dye; Filtration membrane;
D O I：
10.16865/j.cnki.1000-7555.2020.0289
中图分类号：
学科分类号：
摘要：
In this paper, a carboxylated titanium dioxide/calcium alginate (TiO2-COOH/CaAlg) hydrogel filtration membrane was prepared by Ca2+ ionic cross-linking with carboxylated titanium dioxide (TiO2-COOH) nanoparticles as enhancer and sodium alginate (NaAlg) as substrate. FT-IR and SEM were used to characterize the chemical structure and morphology of composite membranes, respectively. The mechanical properties, dye rejection properties and anti-fouling properties of composite membranes were studied. The results indicate that TiO2-COOH nanoparticles are dispersed more uniformly than TiO2 in the composite membranes. The mechanical performance is enhanced due to the cross-linking between Ca2+ ion and -COOH in the TiO2-COOH and NaAlg. When the content of TiO2-COOH is 20%, the breaking strength, breaking elongation rate, elastic modulus and fracture energy of the composite membrane are all the largest, and the rejection to Direct black 38 can reach 96%. The pH and inorganic salts (NaCl and Na2SO4) of feed have a relatively small influence on the dye rejection. The rejection to Direct black 38 remains above 93% and the permeate flux is about 15 L/(m2•h) when the composite membrane filtrates the mixture of Direct black 38/Na2SO4 for 12 h under the operating pressure of 0.1 MPa. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：103 / 108
页数：5
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