摘要
用Hummers法制备了氧化石墨烯(GO)并用超声波将其分散制备了纳米片层分散液,用XRD和AFM表征了分散的效果。研究了不同含氧量GO对水泥水化晶体微观形貌及胶砂耐折强度和抗压强度的影响,结果表明含氧量为18.65%和25.53%的GO可使水泥水化产物成为花朵状微晶体,而且形状统一、分布均匀,具有显著的增韧增强效果。研究结果也说明了GO能够调控水泥水化晶体产物的形状和尺寸,GO对于水泥水化反应产物具有促进作用和模板效应。研究结果对于提高混凝土建筑的抗裂缝和耐久性具有积极的意义。
Graphene oxide （GO） was prepared by Hummers method and its nano-lamellae disperse liquid was obtained by ultrasonic. The dispersing result was characterized by XRD and AFM. Meanwhile, effects of GO with different oxygen content on the micromorphology of cement hydrate crystals and the folding strength and compression strength of the mortar were investigated, respectively. The results indicated that the GO with oxygen content of 18.65% and 25.53% can make the cement hydrate form the flower shape crystals with uniform shape and distribution evenly. The results also showed that the flower shape hydrate crystals have strong toughening and reinforcing effects on mortar. The experiment results suggested that nano-GO lamellae has promotion and template role for cement hydration reaction and can control the shape and size of cement hydrates. The research result has the positive significance consequence to improving of crack resistance and prolonging life of concrete.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第10期1487-1492,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21276152)
关键词
氧化石墨烯
水泥
水化反应
微观结构
增强增韧
graphene oxide
cement
hydration reaction
micromorphology
toughening and strengthening
作者简介
通讯作者：吕生华（1963-），男，陕西乾县人，博士生导师，教授，主要从事水泥基复合材料微观结构与性能等方面的研究。
