智能自修复高分子材料用高稳定性微胶囊的制备

针对高分子材料的自修复，选取双环戊二烯（DCPD）作为芯材，采用三聚氰胺-尿素-甲醛树脂为壁材，对其进行微胶囊化包裹。通过激光粒度分析仪、光学一摄影显微镜、微机差热天平和傅里叶变换红外光谱仪对微胶囊的粒径分布、表面形貌、热性能和化学结构等进行了表征。讨论了芯材投料量、乳化剂用量以及乳化速率对微胶囊物性的影响。结果表明：所得微胶囊的平均粒径和囊芯含量可以通过选择不同工艺参数得到控制，其囊芯含量最高约90wt．％，体积平均粒径为50～70μm。

Preparation of High Stability Microcapsules for Smart Self-healing Polymer Materials

Towards the self-healing of polymer material, chooses dicyclopentadiene （DCPD） as core, adopts melamine-urea-formaldehyderesin as wall meterial, to fabricate the microcapsules. The properties of microeapsules, including the particle size, the surface morphology, the thermal properties and the chemical structure, are analysed by using laser particle size analyzer, opti- cal-photographic microscope （OM） , microcomputer differential thermal balance amt Fom＇ier trans- form infrared spectroscopy （FT-IR） , respectively. Meanwhile, the effects of the feed capacity of core material, emulsifier content and emulsifying speed on the preparation of microcapsules are dis- cussed. Experimental results indicate that the highest core content of the resultant microcapsules is about 90 wt. % and the average diameter in volume of the microcapsules is in the range of 50-70 μml, which can be adjusted by changing processing parameters.