摘要
分别以蒸馏水、无水乙醇为过程控制剂,采用机械球磨法制备壳聚糖微细粉体,研究过程控制剂的种类和添加量对其产率、粒径分布、微观形貌、黏均分子量、化学结构、结晶结构以及热性能的影响。结果表明:采用无水乙醇为过程控制剂效果最好,当乙醇用量为0.75mL/g时,壳聚糖粉体的产率最高,从25%提高到94.7%,而且得到的壳聚糖粉体的粒径分布集中,D50为824nm,D90为1629nm。采用乙醇为过程控制剂制备的壳聚糖微细粉体未发生衍生化反应,但是其黏均分子量下降了23%,结晶结构受到部分破坏,热稳性变差。
With ethyl alcohol or distilled water as process control agent（PCA）,micron chitosan powder was prepared by ball milling method.The yield rate,particle size distribution,micro morphology,viscosity average molecular mass,chemical and crystal structures,and thermal properties of these different micron chitosan powders were measured.The results indicate that the yield rate of micron chitosan powders prepared with ethyl alcohol as PCA increases significantly,and improves to 94.7%from 25% while the amount of ethyl alcohol is 0.75mL/g.The particle size distribution of micron chitosan powder prepared with ethyl alcohol as PCA is concentrated,while the D50 and D90in size are824 nm and 1629 nm respectively.Chitosan do not react with ethyl alcohol used as PCA,but the viscosity average molecular mass of prepared micron chitosan powder decreases by 23%,the crystal structures are destroyed slightly,and its thermal stability is slightly weakened.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2016年第12期54-60,共7页
Journal of Materials Engineering
基金
湖北省教育厅中青年人才项目资助(Q20151607)
关键词
壳聚糖
微细粉体
机械球磨法
过程控制剂
粒径分布
chitosan
micron powder
ball milling method
process control agent
particle size distribution
