氧化石墨烯/水泥基复合材料的微观结构和性能  

Microstructure and Properties for Composites of Graphene Oxide/Cement

作　　者：吕生华[1] 张佳[1] 罗潇倩 朱琳琳[1] 倪蔡辉 LV Shenghua;ZHANG Jia;LUO Xiaoqian;ZHU Linlin;NI Caihui(College of Bioresourees Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi＇an 710021, China;Nantong New Building Materials Co. Ltd., Nantong 226299, China)

机构地区：[1]陕西科技大学资源与环境学院,西安710021 [2]南通新型建筑材料有限公司,南通226299

出　　处：《材料研究学报》2018年第3期233-240,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(21276152);陕西省科技统筹项目(2016KTCL01-14)~~

摘　　要：对石墨进行氧化和超声分散制备了氧化石墨烯(GO)纳米片层分散液,GO纳米片层的厚度小于11.95 nm、平面尺寸为50~900 nm,结构中含有羟基、羰基和环氧基等化学基团。在水泥复合材料中掺入0.03%的GO纳米片层,水泥基复合材料在整体上形成了由多面体状晶体通过相互交织、贯穿、嵌入等方式构成的带有花型形貌的规整微观结构。这种结构使水泥基复合材料的28 d抗折强度和抗压强度分别比对照样品提高了76.2%和86.1%,水泥基体的孔隙率、平均孔径以及裂缝等明显减少。Graphene oxide（GO）nanosheets were prepared via oxidation treatment of graphite and then the dispersion liquid of which was prepared by ultrasound vibration in.The thickness and plane size of GO nanosheets are less than 11.95 nm and within 50-900 nm respectively.There are many chemical groups such as hydroxyl,carbonyl and epoxy groups on GO nanosheets.The prepared composite of graphene oxide/cement composited of ordinary cement and 0.03% GO nanosheets presents the regular micromorphology of ordinary cement,which consists of polyhedron-like cement hydration crystals by interweaving,penetrating and embedding each other.The compressive and flexural strength of the composite of GO/cement after curing for 28 days increase by 76.2% and 86.1% respectively,in comparison to that of the ordinary cement without GO addition,correspondingly the porosity and average pore diameter as well as cracks decrease obviously too.

关 键 词：无机非金属材料 氧化石墨烯 水泥基复合材料 水泥水化产物 微观结构 

分 类 号：TU528.572[建筑科学—建筑技术科学]