摘要
以氧化石墨烯(GO)和碳纤维(CF)为增强相,制备了GO水泥、CF水泥和GO-CF水泥复合材料。利用电子万能试验机和扫描电镜研究了GO-CF水泥复合材料的力学性能,GO水泥、CF水泥的断口形貌以及增强相与水泥界面的结合情况。结果表明,GO能够显著提升水泥的抗压强度,而碳纤维能够显著提升水泥的抗拉强度,GO(0.1%)-CF(1%)水泥复合材料的抗压强度和抗拉强度分别为66.4和15.4 MPa,相比普通水泥,提高了83.7%和44.9%;GO-CF水泥中GO可改善水泥结晶缺陷;GO和碳纤维的特殊二维结构和高强度力学性能,分别在压溃和拉伸断裂过程中,有效抑制了微裂纹的形成和扩展,提高了复合材料的力学性能。
The GO cement, CF cement and GO-CF cement composite materials were prepared with the enhancement of graphite oxide （GO） and carbon fiber （CF）. The mechanical properties of composite materials were studied by electronic universal testing machine. The fracture morphology of GO cement, CF cement and the combination of enhanced phase and cement interface were studied by scanning electron microscopy. The results show that GO can improve the compressive strength of cement significantly, while carbon fiber can significantly improve the tensile strength of cement. The tensile strength and compressive strength of the GO-CF cement have been significantly improved compared with ordinary cement. The compressive strength and tensile strength of the cement composites were 66.4 MPa and 15.4 MPa respectively, which were improved by 83.7% and 44.9% compared with ordinary cement. GO in GO-CF cement can reduce the crystallization defects of cement. The two-dimensional structure and high strength mechanical properties of GO and CF can effectively inhibit the formation and expansion of microcracks and improve the mechanical properties of the composite material in the process of crushing and tensile failure.
作者
李显铭
LI Xianming(Dongfang College,Zhejiang University of Finance and Economics,Haining 314408,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第6期158-162,共5页
Journal of Functional Materials
关键词
氧化石墨烯
碳纤维
水泥复合材料
力学性能
graphene oxide
carbon fiber
cement composites
mechanical property
