印染助剂Issue(1)：36-40,5.
蜡质玉米淀粉羧基化的工艺优化探究
Study on optimization process of carboxymethyl waxy maize starch
摘要
Abstract
In order to solve the problem of the price increasing because of alginate gradual y turning into food supplies, leading to the printing production costs rising, the novel and low-cost modified paste had be⁃come a hot spot in recent years. Synthesis of carboxymethyl starch with low-cost and good printing perfor⁃mance was studied. Water-soluble high substitution degree of carboxymethyl starch sodium was prepared us⁃ing waxy corn starch as raw material, ethanol and isopropyl as solvent. The effects of ratio of solvent, alkaliza⁃tion time and temperature, etherification time and temperature, the amount of NaOH, the amount of monochlo⁃roacetic acid and water content on the degree of substitution of the product were investigated. Through or⁃thogonal experiments, the optimum technological conditions were obtained as fol ows: the amount of solvent [V(ethanol)∶V(isopropanol)=5∶5] was 3.4 mL/g, the water content was 5%, alkalization time was 90 min, basifi⁃cation temperature was 35 ℃, etherification time was 4.5 h, etherification temperature was 55 ℃, molar ratio of chloroacetic acid and starch was 1.15∶1, the molar ratio of NaOH and starch was 2.55∶1. Under these condi⁃tions, substitution degree of carboxymethyl starch sodium reached maximum value of 1.162.关键词
蜡质玉米淀粉/改性/取代度/印花Key words
waxy maize starch/modification/substitution degree/printing分类
轻工纺织引用本文复制引用
马佳利,谭艳君,霍倩,郑章平..蜡质玉米淀粉羧基化的工艺优化探究[J].印染助剂,2016,(1):36-40,5.基金项目
陕西省教育厅重点实验室科研计划项目 （）
