制备工艺条件对固化剂微胶囊性能的影响  

Effect of Preparation Conditions on Properties of Mold-Curing Agent Microcapsule

作　　者：杨原[1] 张闯[1] 杨晓鑫[1] 蔡秀兰[1] 

机构地区：[1]广东药学院药科学院,广东广州510006

出　　处：《广东化工》2016年第10期47-49,共3页Guangdong Chemical Industry

摘　　要：以改性胺1618固化剂为囊芯、以脲醛树脂为壁材单体，采用界面聚合技术，成功制备了一种新型聚脲改性胺微胶囊固化剂。考察了芯壁质量比、反应体系pH及搅拌速率对微胶囊包覆率、分散性及分布情况的影响，确定最佳制备工艺条件。采用傅里叶变换红外光谱、扫描电镜及热重分析仪对微胶囊的化学结构及性能进行表征。结果表明，当芯壁质量比为0,8、反应体系pH为2～3、搅拌速率为0．5kr／min，该条件下制备的微胶囊包覆率为66．7％．分散性及表面致密性好．其热稳定温度达到216℃。A new type of poly （urea-formaldehyde） microcapsules was prepared using urea formaldehyde resin as shell material and modified amine 1618 as core material by interfacial polymerization process. The effects of core/shell mass ratio, pH value and stirring speed on w （core） and distribution of microcapsules were investigated. The distribution and surface topography of microcapsules were characterized using scanning electron microscopy. The compositions of microcapsules were characterized using TG-DTA and Fourier transform infrared spectroscopy. Results showed when the core/shell mass ratio was 0.8, pH value was 2-3 and stirring speed was 0.5 kr/min, the w （core） was 66.7 %. The microcapsules exhibited uniform round and compact surface, the decomposition temperature of the microcapsules was about 216 ℃.

关 键 词：微胶囊 固化剂 界面聚合法 

分 类 号：TQ460.6[化学工程—制药化工]