中国造纸学报2012，Vol.27Issue(2)：40-44,5.
纤维素基水凝胶的溶胀动力学研究
Study on the Swelling Kinetics of pH-sensitive Cellulose-based Hydrogels
摘要
Abstract
Cellulose-graft-acrylic acid (C-g-AA) hydrogels were prepared via graft polymerization in 85% phosphoric acid solution, the pH sensitivity and reversibility, salt sensitivity and swelling kinetics of the hydrogels were tested. The results showed that the hydrogels had obvious pH sensitivity, the swelling reached equilibrium when pH >7, and the hydrogels also displayed excellent pH reversibility. The swelling ratio in distilled water was increased with increasing of AA components in hydrogels, and could reached 73% with mole ratio of 6:1 (AA/ cellulose). The swelling kinetics in the solutions with various pH values indicated that the initial water intake of hydrogels followed a non-Fickian type diffusion with the diffusion exponents all higher than 0.5, and the whole swelling process fit the Schott model well. In distilled water, the initial water intake also followed a non-Fickian type diffusion, while the whole swelling did not obey the Schott swelling kinetic model.关键词
pH值敏感性/溶胀动力学/水凝胶/纤维素Key words
pH-sensitive/ swelling kinetic/ hydrogels/ cellulose分类
化学化工引用本文复制引用
周益名,付时雨,杨韶平,詹怀宇..纤维素基水凝胶的溶胀动力学研究[J].中国造纸学报,2012,27(2):40-44,5.基金项目
国家973项目(No.2010CB732206) （No.2010CB732206）
国家自然科学基金项目(No.30972324). （No.30972324）
