文献类型：期刊文献

中文题名：壳聚糖/脲醛树脂微胶囊的制备和控释性能

英文题名：Preparation and Sustained-Release of Microcapsules Consisting of Chitosan/Urea-Formaldehyde Resin

作者：叶鹏飞[1];陈葵[1];纪利俊[1];朱家文[1];盛勇[2]

机构：[1]华东理工大学化学工程研究所,上海200237;[2]中化化肥有限公司成都研发中心,成都610015

年份：2017

卷号：43

期号：5

起止页码：627

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：微胶囊;壳聚糖;脲醛树脂;缓释农药

外文关键词：microcapsule; chitosan; urea-formaldehyde resin; sustained-release pesticide

摘要：以脲醛树脂(UF)/壳聚糖(CS)复合材料为壳材,以溶解了阿维菌素的二甲苯为芯材,研究脲醛树脂(UF)/壳聚糖(CS)缓控释农药微胶囊的制备方法。改变壳层聚合过程中作为交联剂的甲醛的引入方式,制备得到一系列微胶囊。通过红外光谱仪、粒度分布仪、扫描电镜等对微胶囊的化学结构、组成成分、形貌特征进行表征,发现在缩聚阶段引入甲醛可以提高微胶囊壳层中壳聚糖的含量,进而提高微胶囊的包覆率和缓释效果。在优化条件下制备得到的微胶囊粒径7.14μm,包覆率大于70%。
A series of microcapsules were prepared with urea-formaldehyde resin （UF）/chitosan （CS） as the shell, and avermectin xylene solution as the core. The chemical structure, composition and morphology of the microcapsules were characterized by F T -IR,GSD and SEM,and the sustained-release properties were studied. The results show that the formaldehyde introduced in the pre-polymerization stage of the polycondensation can increase the content of chitosan in shell layer. Therefore, the encapsulation rate of avermectin and sustained-release rate of the microcapsules are improved. Under optimized preparation conditions,the particle size of MCP is 7. 14 #m and encapsulation efficiency is more than 70%.