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论文类型：期刊论文

发表时间：2014-08-05

发表刊物：JOURNAL OF APPLIED POLYMER SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：131

期号：15

ISSN号：0021-8995

关键字：adsorption; biocompatibility; cellulose and other wood products; dyes; pigments

摘要：Betaine-modified cationic cellulose was prepared through the reaction of cellulose with betaine hydrochloride by an efficient one-step dry method. Dicyandiamide was used as a dehydrating agent to promote the formation of ester bonds between the reactants. Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy were used to characterize the cellulose betainate. Experiments showed that at a molar ratio of the cellulose glucose unit, betaine hydrochloride to dicyandiamide, of 1:1:0.5 at 150 degrees C for 3 h, the degree of substitution of the cationic group reached 0.80. The adsorption of simulated C. I. Reactive Red 24 and C. I. Reactive Red 195 wastewater on the cationic cellulose was carried out, and the effects of the adsorbent dose, initial dye concentration, and salt concentration on the dye removal efficiency were investigated. The equilibrium adsorption isotherm data of the cationic cellulose exhibited a better fit to the Langmuir isotherm model than the Freundlich one. The experimental results suggest that the prepared cationic cellulose materials show potential application for reactive dye wastewater treatment. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40522.