期刊
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
卷 -, 期 -, 页码 -出版社
BUDAPEST UNIV TECHNOLOGY ECONOMICS
DOI: 10.3311/PPch.21253
关键词
ultrafiltration membrane; biopolymer; inorganic mixed matrix; citric acid; pore size determination
This paper presents the successful preparation of porous membranes based on chitosan with enhanced mechanical, thermal and chemical properties applicable in water treatment field. The addition of kaolin as reinforcing agent, polyethylene glycol as pore former, and citric acid as cross-linker in the chitosan matrix improved the membrane properties. The cross-linked membranes exhibited improved water resistance, thermal and mechanical properties compared to neat chitosan films.
This paper presents the successful preparation of porous membranes based on chitosan with enhanced mechanical, thermal and chemical properties applicable in water treatment field. Herein, chitosan/kaolin composite membranes with a cross-linking agent and a porogen were prepared using the solvent casting method. The characterization of the as-fabricated membranes indicated that the combined effect of kaolin as reinforcing agent, polyethylene glycol as pore former and citric acid as cross-linker in a chitosan matrix showed a significant influence on the membrane properties. The results indicated that the incorporation of a hydrophilic porogenic reagent into the collodion in addition to providing a porous morphology makes it possible to obtain a more hydrophilic membrane, and thus induces an increase in the pure water permeability. The cross-linked membranes exhibited an improved water resistance, better thermal and mechanical properties as compared to neat chitosan films. The cross-linked membranes had a mean pore size of 50 nm falling in the range of ultrafiltration. Their functional properties were determined in terms of pure water filtration and molecular weight cut-off tests.
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