化工学报2017，Vol.68Issue(6)：2585-2595,11.DOI:10.11949/j.issn.0438-1157.20161575
氧化石墨烯对水泥基复合材料微观结构的调控作用及对抗压抗折强度的影响
Regulation of graphene oxide on microstructure of cement composites and its impact on compressive and flexural strength
摘要
Abstract
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.关键词
纳米材料/复合材料/团聚/氧化石墨烯/水泥水化晶体/微观结构Key words
nanomaterials/composites/agglomeration/graphene oxide/cement hydration crystals/microstructure分类
建筑与水利引用本文复制引用
吕生华,张佳,朱琳琳,贾春茂..氧化石墨烯对水泥基复合材料微观结构的调控作用及对抗压抗折强度的影响[J].化工学报,2017,68(6):2585-2595,11.基金项目
国家自然科学基金面上项目(21276152) （21276152）
陕西省科技统筹资源引导项目(2016KTCL01-14).supported by the National Natural Science Foundation of China(21276152) and the Innovational Industrialization Foundation of Shaanxi Provice of China(2016KTCL01-14). （2016KTCL01-14）
