KH560功能化氧化石墨烯/光敏性不饱和聚酯树脂复合材料的制备与性能

Synthesis and characterization of reinforced photosensitive unsaturated polyester by KH560 functionalized nano graphene oxide

合成了γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)功能化氧化石墨烯(FGO),通过红外光谱和热重进行了表征分析。通过加入FGO对混杂型(自由基-阳离子混杂机制)光敏树脂(CRCPR)进行改性,探讨了FGO的加入对CRCPR的黏度、凝胶率和体积收缩率的影响,并测试了固化FGO/CRCPR复合材料的力学性能。结果表明:与氧化石墨烯(GO)相比,由于功能团的引入,FGO在树脂中呈现良好的分散性,少量FGO的引入既未明显改变树脂的黏度,也未降低树脂的凝胶率;同时,极少量FGO的加入即可大幅提高固化FGO/CRCPR复合材料的力学性能,当FGO的质量分数为0.06%时,体积收缩率降低了37%,拉伸强度和弯曲强度分别提高了71.8%和26.9%,冲击强度也提高了49.7%。良好的力学性能与FGO良好分散性及FGO与CRCPR基体良好的界面性能有关。

Theγ-（2,3-epoxypropoxy）propytrimethoxysilane（KH560）graphene oxide（FGO）was prepared and characterized with FTIR and TGA.With the addition of FGO into radical-initiated and cationic-initiated photosensitive resins（CRCPR）,the viscosity,gel rate and volume shrinkage of FGO/CRCPR were investigated.The mechanical properties of FGO/CRCPR composites were tested.The results show that compared with graphene oxide（GO）,the viscosity doesn＇t markedly increase with the addition of FGO and the gel rate also doesn＇t reduce significantly,indicating that FGO has a good compatibility with the matrix.The results indicate that the volume shrinkage decreases by 37%,the tensile,the bending and the impact strength of the cured nano FGO/CRCPR composites,increase by 71.8%,26.9% and 49.7% respectively,when the mass fraction is 0.06%,due to the excellent mechanical properties of FGO itself,the good compatibility of FGO with the matrix and the strong interface bonding between FGO and the matrix.