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利用预浸料技术热压工艺,制备了氧化石墨烯改性的炭纤维环氧树脂基复合材料。为获得更好的分散效果及加工性能,选用四氢呋喃作为溶剂来分散氧化石墨烯。结果显示:含有氧化石墨烯的混合胶液体系可稳定3 h左右,满足预浸料制备工艺要求;制得的复合材料单向层板层间剪切强度(ILSS)有较大提高,当氧化石墨烯含量为0.10%时,其达到96.14 MPa,与空白样板相比提高了约8.05%,玻璃化转变温度升高近5℃。断面形貌分析表明,上述显著提高可能是由于氧化石墨烯的加入使得环氧树脂增韧以及炭纤维复合材料的界面得到较大的改善所致。
The graphene oxide modified carbon fiber epoxy resin matrix composites were prepared by prepreg technology. In order to obtain better dispersing effect and processability, tetrahydrofuran is used as a solvent to disperse the graphene oxide. The results show that the mixed glue system containing graphene oxide can stabilize for about 3 h and meet the requirements of prepreg preparation process. The interlaminar shear strength (ILSS) When the content of graphene is 0.10%, it reaches 96.14 MPa, which is about 8.05% higher than that of the blank sample, and the glass transition temperature increases nearly 5 ℃. The analysis of the cross section morphology shows that the above mentioned significant increase may be due to the toughening of the epoxy resin and the improvement of the interface of the carbon fiber composite material due to the addition of graphene oxide.