Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7789392 | Carbohydrate Polymers | 2015 | 6 Pages |
Abstract
The permeation and separation characteristics of an ethanol/water azeotrope through chitosan membranes of different molecular weights and degrees of deacetylation during pervaporation were investigated. The normalized permeation rate decreased with increasing molecular weight up to 90Â kDa, but at over 90Â kDa, the rate increased. On the other hand, the water/ethanol selectivity increased with increasing molecular weight up to 90Â kDa but decreased at over 90Â kDa. With increasing degree of deacetylation, the water/ethanol permselectivity increased significantly, but the normalized permeation rate decreased. The characteristics of chitosan membranes are discussed based on their chemical and physical structures such as the contact angle, density, degree of swelling, and glass transition temperature.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Tadashi Uragami, Tomoyuki Saito, Takashi Miyata,