Regulation of graphene oxide on microstructure of cement composites and its impact on compressive and flexural strength

被引：0
|
作者：
Lü S. [1 ]
Zhang J. [2 ]
Zhu L. [1 ]
Jia C. [3 ]
机构：
[1] College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, Shaanxi
[2] College of Environment Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, Shaanxi
[3] College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, Shaanxi
来源：
Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Agglomeration; Cement hydration crystals; Composites; Graphene oxide; Microstructure; Nanomaterials;
D O I：
10.11949/j.issn.0438-1157.20161575
中图分类号：
学科分类号：
摘要：
Graphene oxide (GO) was prepared by oxidation, and the intercalation composite of GO/P(AA-AM) was prepared by intercalation polymerization of GO with acrylic acid(AA) and acrylamide (AM). The testing results indicated that GO nanosheets in the GO/P(AA-AM) had smaller size and uniform dispersion. Meanwhile, it is found that GO nanosheets can regulate the cement hydration products to form regular needle-like, rod-like, or polyhedron-like crystal, also ordered microstructure and macrostructure. The cracks and harmful pores in the cement composites have obviously decreased. The compressive and flexural strength have significant increase compared with the control samples. The regulation mechanism of GO nanosheets on cement hydration crystals and the microstructure of cement composites were proposed. It thinks that GO nanosheets with active chemical groups have the promoting and template effects on forming regular shapes of cement hydration crystals. The initial regular crystals play a template role for later formed crystals, and finally form large-volume and regular shape crystals and ordered microstructure and macrostructure by crystals growing. © All Right Reserved.
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页码：2585 / 2595
页数：10
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