甲壳素在苛性碱水溶液中的溶解  

Dissolution of Chitin in Aqueous Alkali Solution

作　　者：陈冬年[1] 吴慧琼 张晓敏 

机构地区：[1]南京理工大学泰州科技学院,江苏泰州225300

出　　处：《广东化工》2017年第21期38-39,共2页Guangdong Chemical Industry

基　　金：泰州市科技支撑项目TN201520

摘　　要：本文有关于甲壳素在苛性碱水溶液通过冻融法溶解的方法。探讨了苛性碱种类、浓度,冻融轮数,解冻时搅拌等因素对甲壳素溶解的影响。结果表明,NaOH水溶液和KOH水溶液对甲壳素有较好的溶解性,LiOH水溶液对甲壳素的溶解性较差;NaOH的浓度过低或过高时甲壳素的溶解率均不高,只有在中等浓度即14%(w/w)左右才能具有较好的溶解能力,与此类似,KOH浓度为19%(w/w)时甲壳素的溶解率达到最高;冻融操作进行的轮数越多,甲壳素溶解率越高,但3轮之后溶解率提高幅度很小;解冻时的持续充分搅拌有利于甲壳素的分散溶解。This paper is on the dissolution of chitin in aqueous alkali solution by freeze-thawing treatment. The effect of type and concentration of alkali, times of freeze-thawing treatment and stirring during thawing on the solubility of chitin were discussed. The results showed that the aqueous solution of NaOH and KOH had better solubility to chitin, and the solubility of aqueous LiOH solution to chitin was poor. When the concentration of NaOH is about 14 %（w/w）, the solubility of chitin reaches the highest level, and when the concentration of NaOH is too high or too low, the solubility is poor. Similarly, when the concentration of KOH is about 19 %（w/w）, the solubility of chitin reaches the highest level. The more the number of rounds in the freeze-thawing treatment, the higher the solubility of chitin, but after the 3rd round the increase in the solubility of chitin is very small. Continuous stirring during thawing treatment is conducive to the dispersion and dissolution of chitin.

关 键 词：甲壳素 溶解 苛性碱水溶液 冻融 

分 类 号：TQ[化学工程]