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采用原位聚合法制备了以三聚氰胺-脲甲醛为壁材,环氧E-51为芯材的微胶囊(MUF),并将其应用到碳纤维(CF)增强不饱和聚酯(UP)复合材料中,详细探讨了CF质量分数和MUF质量分数对碳纤维/不饱和聚酯(CF/UP)复合材料和微胶囊/碳纤维/不饱和聚酯(MUF/CF/UP)复合材料热稳定性、力学性能和自修复性能的影响。通过OM和SEM观察MUF的表面形貌,FTIR对MUF、CF/UP复合材料和MUF/CF/UP复合材料的化学结构进行表征,TGA、悬臂梁冲击仪和万能拉力试验机对复合材料的热稳定性、冲击性能、拉伸性能和自修复性能进行测试。结果表明,CF和MUF质量分数均为1%时,MUF/CF/UP复合材料的热稳定性较佳,力学性能及自修复性能较优;其拉伸强度为3.99 MPa,弹性模量为229.58 MPa,断裂伸长率为2.12%,冲击强度为86.75 k J/m~2,自修复效率为62.02%。
In situ polymerization was used to prepare microcapsules (MUF) with melamine-urea formaldehyde as the core material and epoxy E-51 as the core material, and applied to carbon fiber (CF) reinforced unsaturated polyester (UP) , The effects of the mass fraction of CF and MUF on the thermal stability of the composites of carbon fiber / unsaturated polyester (CF / UP) and microcapsules / carbon fiber / unsaturated polyester (MUF / CF / Impact of performance and self-healing performance. The surface morphology of MUF was observed by OM and SEM. The chemical structures of MUF, CF / UP composites and MUF / CF / UP composites were characterized by FTIR. The thermal properties of composites were evaluated by TGA, Izod impact tester and universal tensile testing machine Stability, impact performance, tensile properties and self-healing properties of the test. The results show that the thermal stability of MUF / CF / UP composites is better when both the mass fraction of CF and MUF are 1%, and the mechanical properties and self-healing properties are better. The tensile strength is 3.99 MPa and the elastic modulus is 229.58 MPa, elongation at break of 2.12%, impact strength of 86.75 kJ / m ~ 2 and self-healing efficiency of 62.02%.