氧化石墨烯与功能化碳纳米管增强水泥基材料力学性能研究  

Comparison of Properties between Graphene Oxide and Functionalized Carbon Nanotubes Reinforced Cement-based Materials

作　　者：孙江兰 邹喜道 牛志强[1] SUN Jiang-lan;ZOU Xi-dao;NIU Zhi-qiang(School of Civil Engineering,Zhengzhou Institute of Science and Technology,Zhengzhou 450064,China;Henan First Construction Engineering Group Co.Ltd.,Zhengzhou 450002,China)

机构地区：[1]郑州科技学院土木建筑工程学院,郑州市450064 [2]河南省第一建筑工程集团有限责任公司,郑州市450002

出　　处：《公路》2022年第9期365-373,共9页Highway

基　　金：国家自然科学基金项目,项目编号U1504523;河南省科技厅科技攻关项目,项目编号182102311081。

摘　　要：水泥基材料在建筑领域应用广泛,但其存在抗弯强度低、抗裂性和韧性差等缺点。为了提高水泥基材料性能,分别采用球磨石墨粉和酸处理碳纳米管制备了氧化石墨烯(GO)和功能化碳纳米管(FCNT),并使用扫描电子显微镜(SEM)对其进行检测表征。研究不同GO和FCNT掺量的水泥基纳米复合材料的抗压强度、抗拉强度、微观结构和晶相组成。研究结果表明:与普通水泥砂浆相比,1.00%GO掺量对水泥砂浆抗压强度的贡献最大,抗压强度提高77.3%;0.25%GO掺量对水泥抗拉强度的贡献最大,其抗拉强度提高37.5%;相比之下,0.50%FCNT掺量使水泥砂浆抗压强度提高了58.2%,0.25%FCNT掺量使水泥砂浆抗拉强度提高了40%;通过GO-CNC和FCNT-CNC的微观结构和晶相组成研究验证了水泥砂浆的力学行为趋势。GO掺量对水泥基纳米复合材料的力学性能提升效用大于FCNT,GO可作为一种潜在经济高效的水泥基纳米增强材料。Cement based materials are widely used in the construction field,but they have such disadvantages like low flexural strength,poor crack resistance and toughness.In order to improve the properties of cement-based materials,graphene oxide(GO)and functionalized carbon nanotubes(FCNT)are prepared by ball mill toner and acid treated carbon nanotubes,respectively,and characterized by X-ray diffraction(XRD).The compressive strength,tensile strength,microstructure and crystalline phase composition of cement-based nanocomposites with different GO and FCNT contents are studied.The experimental results show that compared with ordinary cement mortar,adding 1.00% GO has the greatest contribution to the compressive strength of cement mortar,and the compressive strength is increased by77.3%;adding 0.25% GO can contribute the most to the tensile strength of cement,and its tensile strength is increased by 37.5%.In contrast,the compressive strength of cement mortar is increased by 58.2% with 0.50% FCNT and the tensile strength of cement mortar increased by 40% with 0.25% FCNT.In addition,the mechanical behavior trend of cement mortar is verified by the micro-structure analysis and crystal phase composition of GO-CNC and FCNT-CNC.The effect of GO content on improving the mechanical properties of cement-based nanocomposites is greater than FCNT,which means that GO can be used as a potential economic and efficient cement-based nanocomposites.

关 键 词：水泥 氧化石墨烯 功能化碳纳米管 力学性能 微观作用机理 

分 类 号：U414.01:TQ172.7[交通运输工程—道路与铁道工程]