Dehydration of an ethanol/water azeotrope by novel organic-inorganic hybrid membranes based on quaternized chitosan and tetraethoxysilane

Biomacromolecules
Tadashi UragamiAkon Higuchi

Abstract

To control swelling of quaternized chitosan (q-Chito) membranes, mixtures of q-Chito as an organic component and tetraethoxysilane (TEOS) as an inorganic component were prepared using the sol-gel reaction, and novel q-Chito/TEOS hybrid membranes were formed. In the separation of an ethanol/water azeotrope by pervaporation, the effect of TEOS content on the water/ethanol selectivity of q-Chito/TEOS hybrid membranes was investigated. Hybrid membranes containing up to 45 mol % TEOS exhibited higher water/ethanol selectivity than the q-Chito membrane. This resulted from depressed swelling of the membranes by formation of a cross-linked structure. However, introduction of excess TEOS led to greater swelling of the hybrid membranes. Therefore, the water/ethanol selectivity of the hybrid membranes containing more than 45 mol % TEOS was lower than that of the q-Chito membrane. The relationship between the structure of q-Chito/TEOS hybrid membranes and their permeation and separation characteristics during pervaporation of an ethanol/water azeotrope is discussed in detail.

References


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Citations

Dec 3, 2014·Colloids and Surfaces. B, Biointerfaces·Taka-Aki AsohAkihiko Kikuchi
Jul 20, 2012·Colloids and Surfaces. B, Biointerfaces·A C JayalekshmiChandra P Sharma
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Jun 15, 2007·Journal of Biomedical Materials Research. Part a·Tzu-Wei WangTai-Horng Young
Dec 12, 2012·Acta Biomaterialia·Ali AssifaouiPhilippe Cayot
Mar 8, 2013·Carbohydrate Polymers·Stefan SpirkKarin Stana-Kleinschek
Dec 21, 2014·International Journal of Biological Macromolecules·Ahmed SalamaAhmed El-Gendy
Nov 5, 2016·International Journal of Biological Macromolecules·Lujie ZhangRuihua Huang
May 18, 2021·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Najwa BellemjidAbdelghani Iddar

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