Effect of graphene oxide nanosheets of microstructure and mechanical properties of cement composites
Effect of graphene oxide nanosheets of microstructure and mechanical properties of cement composites
复制标题
氧化石墨烯纳米片对水泥复合材料微观结构和力学性能的影响
DOI：
10.1016/j.conbuildmat.2013.08.022
复制
发表时间：
2013-12-01
影响因子：
7.4
通讯作者：
Zhou, Qingfang
中科院分区：
文献类型：
--
作者：
Lv, Shenghua;Ma, Yujuan;Zhou, Qingfang
采用氧化和超声分散法制备了氧化石墨烯纳米片。通过观察水泥水化晶体形态变化和机械强度测试，研究氧化石墨烯纳米片对水泥复合材料微观结构和力学性能的影响；结果表明，氧化石墨烯纳米片可以调节花状晶体的形成，并显著提高相应水泥复合材料的抗拉/弯曲强度。提出了一种可能的调控机制，认为氧化石墨烯纳米片表现出模板效应，有助于形成花状晶体。该研究为通过简单的方法显著提高水泥复合材料的韧性提供了新的途径。(C) 2013 Elsevier Ltd.版权所有。
Graphene oxides (GOs) nanosheets were prepared by oxidization and ultrasonic dispersion. Effects of GO nanosheets on microstructure and mechanical properties of cement composites were investigated by observing shape changes of cement hydration crystals and testing mechanical strength; The results indicated that GO nanosheets can regulate formation of flower-like crystals and remarkably increase the tensile/flexural strength of the corresponding cement composites. A possible regulation mechanism was proposed and thought GO nanosheets exhibited the template effect and contributed to the formation of flower-like crystals. The research provide a new pathway to significantly improving the toughness of cement composites by a simple method. (C) 2013 Elsevier Ltd. All rights reserved.