E-51环氧树脂微胶囊的制备与表征

Preparation and characterization of E-51 epoxy resin microcapsule

以脲醛树脂为囊壁,双酚A型环氧树脂（E-51）和正丁基缩水甘油醚（BGE）混合物为囊芯,采用两步原位聚合法合成了脲醛树脂包覆环氧树脂体系的微胶囊,并对其进行了检测和表征。采用金相显微镜（MS）观测微胶囊的形成过程;采用扫描电子显微镜（SEM）观察微胶囊的表面形貌;采用红外光谱（FT-IR）分析判定微胶囊成分结构;应用热重分析（TGA）测试微胶囊的热稳定性。结果表明,制备的微胶囊包覆完整、形状基本呈球形、表面粗糙致密,粒径大小分布为5~70μm,平均粒径约为37μm,囊芯质量含量大约为71.6%。在200℃以下时具有良好的热稳定性。

Microcapsules were synthesized by two-step in-situ polymerization using the urea-formaldehyde（UF）aa shell material and the mixture of epoxy resin E-51/butyl glycidyl ether（BGE）as core material. Metalloscope（MS）was used to observed the process of microcapsules. The surface morphology of microcapsules by scanning electronic microscope （SEM）. By using fourier transform infrared spectroscopy （FT-IR） to analyse and determine whether the formation of mi- croeapsule shell material, whether the core material was successfully coated. And thermal gravimetric analysis （TGA）was used to test the thermal stability of microcapsules. The results showed that the microcapsules were prepared successfully. Their basic shape was spherical,and their surface was rough. The particle size distribution of microeapsules range was be tween 5 and 70μm, the average size was around 37μm. The content of core about 71.6wt%. Besides, microcapsules can re- main stable under 200℃.