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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 nanoplatelets (GNSs) were prepared by oxidation-reduction method. GNSs were then added to the benzoxazine (BOZ) / epoxy resin (EP) system to prepare GNS / BOZ / EP composites. The structures of the obtained GNSs were characterized and analyzed by FT-IR, TEM and XRD. The mechanical properties and heat resistance of the composites were also studied. The results show that GNS can improve the mechanical properties and heat resistance of BOZ / EP system. When GNS = 0.2% (relative to the total mass of the composite), the overall performance of GNS / BOZ / EP system is relative The impact strength (14.2 kJ / m2) was 14.5% higher than that of BOZ / EP system and the flexural strength reached 139 MPa. The initial thermal decomposition temperature and maximum thermal decomposition temperature (299.7 and 353.4 ℃ respectively) improve.