福建林学院学报2013，Vol.33Issue(1)：87-92,6.
纤维素乙酰化改性研究
Modification of cellulose by acetylation
摘要
Abstract
Cellulose acetate was obtained from cotton pulp in the system of glacial acetic acid with acetic anhydride as co-reactant and high concentration H2SO4 as catalys. Three factors, including reaction temperature, reaction time and level of catalyst, each having 5 levels, were chosen to investigate their effects on degree of substitution (DS) of the cellulose acetate. The functional groups, micro structure and thermostability of the cellulose acetate were characterized using infrared spectrometer (FTIR) , X-ray diffraction (XRD) and thermo gravimetric analyzer (TGA). The results suggested that the optimum reaction conditions (reaction at 90 ℃ and 0.5% of catalyst level for 4 hours) could lead to the highest DS of cellulose acetate. Infrared spectra analysis confirmed the existence of abundant ester in the reaction product. The XRD suggested that, compared with cellulose, the degree of crystallinity in the cellulose acetate was reduced due to the existence of acetyl, consequently, the thermal stability of cellulose acetate was improved.关键词
纤维素乙酸酯/取代度/棉纤维/乙酰化Key words
cellulose acetate/ degree of substitution/ cotton cellulose/ acetylation分类
轻工纺织引用本文复制引用
傅七兰,牛敏,谢拥群..纤维素乙酰化改性研究[J].福建林学院学报,2013,33(1):87-92,6.基金项目
国家自然科学基金资助项目(30871982) （30871982）
"十一五"国家科技支撑计划基金资助项目(2008BADA9B01). （2008BADA9B01）
