界面层性能对碳纤维复合材料(CFRP)性能的影响

EFFECT OF INTERPHASE PROPERTY ON TOUGHNESS AND HYDROTHERMAL RESISTANCE ABILITY OF CFRP

本文报导了一种崭新的提高CFRP韧性及耐湿热性能的方法,即用等离子体处理及聚合接枝改性碳纤维表面,向CFRP中引入既可塑又防水的混杂界面层,使CFRP韧性提高148%,材料破坏过程由脆性破坏转变为韧性破坏,材料的模量、层间剪切强度(ILSS)、玻璃转化温度(T_g)、松弛活化能不但没有下降,而且都有所提高,耐湿热性能也有很大的改善,ILSS强度保留率由92.73%提高到99.79%。

A brand-new method for increasing toughness and raising hydrothermal resistance ability of CFRP (carbon fiber reinforced plastic) was reported in this paper. This method is to treat and polymerize the graft modification surface of the carbon fiber and introduce a plastic and water-proof hybrid interphase into CFRP by cold plasma, so that the toughness of CFRP was increased by 148% and the fracture process of CFRP was transited from brittle fracture into tough fracture. The modulus, ILSS, T_g and relaxation activity energy of CFRP were not decreased but increased. The hydrothermal resistance ability of CFRP was improved very much and the retention ratio of ILSS was raised from 92.73% to 99.79% after 8 h in boiling water.