羧甲基罗望子胶的制备与表征

纺织学报 ›› 2014, Vol. 35 ›› Issue (8): 49-0.

羧甲基罗望子胶的制备与表征

王婷,郭建生

东华大学纺织学院

收稿日期:2013-08-01 修回日期:2013-11-11 出版日期:2014-08-15 发布日期:2014-08-15

Preparation and characterization of carboxymethyl tamarind gum

Received:2013-08-01 Revised:2013-11-11 Online:2014-08-15 Published:2014-08-15

摘要/Abstract

摘要： 研究了以罗望子胶为原料, 用乙醇溶剂法制备羧甲基罗望子胶粉。探讨了乙醇用量、氯乙酸研究了以罗望子胶为原料, 用乙醇溶剂法制备羧甲基罗望子胶。探讨了乙醇用量、氯乙酸用量、醚化时间、醚化温度、氢氧化钠用量、氢氧化钠与氯乙酸摩尔比以及反应体系中碱化温度、碱化时间对羧甲基罗望子胶取代度(DS)的影响，通过正交试验得出制备羧甲基罗望子胶的最佳工艺条件，并通过红外光谱法对产物的结构进行了表征。结果表明：经过改性后的罗望子胶取代度可达到0.5以上，由红外光谱分析知，结构中成功接入了羧甲基，羧甲基罗望子胶的水溶性和粘度稳定性均有了显著性改善。

关键词: 罗望子胶, 羧甲基化, 取代度, 表征

Abstract: Tamarind gum as the raw material was studied for the preparation of carboxymethyl tamarind gum using ethanol as solvent. The degree of substitution (DS) and total extent of etherification were determined by variables such as concentration of ethanol, chloroacetic acid as well as alkalization reaction temperature and time,sodium hydroxide, sodium hydroxide and chloroacetic acid molar ratio as well as etherification reaction temperature and time. The optimum conditions for preparing carboxymethyl tamarind gum were got through orthogonal experiments.The effectiveness of the treatments was evaluated by means of infrared spectroscopy. The results indicated that the degree of substitution of tamarind gum which was modified can reach more than 0.5,and by the analysis of infrared spectrum, the structure of the gum was successfully accessed the carboxymethyl groups, then the water solubility and viscosity stability of carboxymethyl tamarind gum had a significant improvement.

Key words: tamarind gum, carboxymethylation, degree of substitution, characterization

中图分类号:

TQ352.6

王婷郭建生. 羧甲基罗望子胶的制备与表征[J]. 纺织学报, 2014, 35(8): 49-0.

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