MF包封DCPD自修复微胶囊的合成  

Synthesis of MF microcapsule encapsulated DCPD for self-healing materials

作　　者：胡剑峰[1] 夏正斌[1] 司徒粤[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《化工学报》2010年第11期2978-2984,共7页CIESC Journal

摘　　要：自修复材料是目前材料领域的研究热点。它是由包封有活性物质的微胶囊、能使活性物质发生快速交联固化的催化剂和树脂组成。自修复用微胶囊的粒径与壁厚对微胶囊的力学性能有决定性影响,而微胶囊力学性能对自修复材料的应用起着非常重要的作用。本研究采用三聚氰胺-甲醛树脂(MF)为壳材料,双环戊二烯(DCPD)为芯材料,通过原位聚合法制备自修复材料用微胶囊。并使用马尔文粒径分析仪以及透射电镜等仪器研究酸值、反应时间以及乳化搅拌速率等条件对微胶囊粒径和壁厚的影响规律。研究结果表明,pH较低,粒径分布较差,pH对壁厚影响不大;反应时间越长,微胶囊壁厚越厚,反应时间对粒径没有明显影响;乳化搅拌速率越大,粒径分布越好,乳化搅拌速率对微胶囊壁厚没有明显影响。Self-healing material has been the hot-point of research recently. It is composed of microcapsule with active agent, catalyst for active agent＇s fast cross-linking and matrix resin. The application of self- healing material is extremely affected by the mechanical properties of microcapsules, which are determined by the size distribution and shell thickness of self-healing microcapsule. Microcapsule for self-healing materials was formulated with melamine formaldehyde （MF） as shell material and dicyclopentadiene （DCPD） as core material by using in situ polymerization in this research. The relationships of size distribution and shell thickness of microcapsule versus pH value, reaction time and agitating rate were investigated with MasterSizer2000 （MS2000） and transmission electron microscopy （TEM）. The results showed that size distribution was worse and shell thickness did not change much when pH value was decreased. Shell thickness increased and size distribution did not change significantly when reaction time was prolonged. Size distribution was better and shell thickness did not change significantly when agitating rate was increased.

关 键 词：自修复材料 微胶囊 三聚氰胺-甲醛树脂 原位聚合 

分 类 号：TQ32[化学工程—合成树脂塑料工业]