摘要
石墨烯和氧化石墨烯(GO)已在水泥基材料中得到广泛应用,但石墨烯不易分散,GO易与阳离子交联团聚。针对上述问题,本试验制备一种边缘氧化的石墨烯(EOG),掺入水泥制成EOG水泥基复合材料。结果表明,EOG具有良好的晶体单层结构,其边缘被氧化而基面结构保持良好;在水泥模拟孔隙溶液中,EOG分散性能较好;力学性能分析表明,不同于0.05%GO的最佳掺量,EOG在水泥中的最佳掺量为0.1%,0.1%EOG水泥基复合材料28 d抗折和抗压强度分别为8.27 MPa和57.71 MPa,较空白样分别提高28.62%和35.15%。与GO类似,EOG有促进水泥水化的作用,EOG水泥基复合材料较GO内部结构更紧密,进而提高了材料的力学性能。
Graphene and Graphene oxide(GO)had been widely applied in cement-based materials.However,the poor dispersion of graphene and the re-aggregation of GO resulting from the cross link by divalent cations still existed.In this paper,the edge-oxide graphene(EOG)was prepared and mixed with cement to make EOG cement-based composites.The results confirmed that EOG had the well-crystallized single-layer structure with oxidized edge and good plane structure.In cement simulated pore solution,EOG exhibited good dispersion performance.The mechanical property analysis showed that the optimal content of EOG in cement was 0.1%,GO was 0.05%.The flexural strength and compressive strength of 0.1%EOG cement-based composite were 8.27 MPa and 57.71 MPa after 28 days,increased by 28.62%and 35.15%compared with the control,respectively.Similar to GO,EOG also promoted cement hydration,but the internal structure of EOG cement-based composites was tighter,which improved the mechanical properties of the composites.
作者
张巨璟
张永胜
Zhang Jujing;Zhang Yongsheng(College of Construction Engineering,Shaanxi Vocational and Technical College,Xi’an,Shaanxi 710038;College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024)
出处
《非金属矿》
CSCD
北大核心
2022年第6期50-53,57,共5页
Non-Metallic Mines
基金
国家自然科学基金(51978437)
2021年度陕西高等职业教育教学改革研究项目“1+X”证书制度背景下教师工程实践教学能力提升策略研究(21GY042)。
关键词
边缘氧化石墨烯
水泥
分散性
力学性能
edge-oxide graphene
cement
dispersion
mechanical property
