GNS/BOZ/EP复合材料的合成及性能研究

Study on synthesis and properties of GNS/BOZ/EP composite

采用氧化-还原法制备了石墨烯纳米片(GNS);然后将GNS加入到苯并噁嗪(BOZ)/环氧树脂(EP)体系中,制成了GNS/BOZ/EP复合材料。采用红外光谱(FT-IR)、透射电镜(TEM)和X射线衍射(XRD)法等对所得GNS的结构进行了表征和分析,同时研究了复合材料的力学性能和耐热性。研究结果表明:GNS能提高BOZ/EP体系的力学性能和耐热性;当w(GNS)=0.2%(相对于复合材料总质量而言)时,GNS/BOZ/EP体系的综合性能相对最优,其冲击强度(14.2 k J/m2)比BOZ/EP体系提高了14.5%左右,弯曲强度达到了139 MPa,最初热分解温度和最大热分解温度(分别为299.7、353.4℃)均有所提高。

The graphene nanosheet （GNS） was prepared by oxidation-reduction method. Then, the GNS/ BOZ （benzoxazine）/EP（epoxy resin） composite was prepared by introducing GNS into BOZ/EP system. The GNS＇s structure was characterized and analysed by FT-IR （infrared spectra）, TEM （transmission electron microscope） and XRD （X-ray diffraction） methods. Meanwhile, the mechanical properties and thermal stability of composite were investigated. The research results showed that the GNS could improve the mechanical properties and thermal stability of BOZ/EP system. The GNS/BOZ/EP system had the relatively best combination property because the impact strength （14.2 kJ/m^2） of GNS/BOZ/EP system was about 14.5% more than that of BOZ/EP system, bending strength of the former reached 139 MPa, the initial thermal decomposition temperature and the maximum thermal decomposition temperature （299.7,353.4 ℃, respectively） of the former were slightly increased when mass fraction of GNS was 0.2% in total composite.