氧化石墨烯在水泥基体中的分散性及对其结构和性能的影响

发布时间：2018-02-24 09:00

本文关键词： 氧化石墨烯水泥基材料水泥基体水泥水化晶体微观结构建筑用化学品　出处：《精细化工》2016年05期 　论文类型：期刊论文

【摘要】：为了解决氧化石墨烯(GO)纳米片层在水泥基体中的分散问题,制备了丙烯酸(AA)、丙烯酰氧乙基三甲基氯化铵(AAC)和丙烯磺酸钠(SAS)的共聚物(PAAS),PAAS与GO纳米片层形成PAAS/GO复合物并显示出分散作用。结果表明,w(PAAS)=2%分别与w(GO)=0.01%、0.02%和0.03%形成的复合物可使水泥基体分别形成由花状晶体、多面体状晶体和针状晶体构成的规整有序的微观结构,28 d时的抗折强度分别比对照样提高了63.0%、90.4%和87.9%,抗压强度分别提高了32.6%、74.2%和71.3%,同时这些水化晶体容易生长在裂缝、孔洞等缺陷处,具有修复结构缺陷的效果。PAAS通过与GO纳米片层形成复合物实现了GO在水泥基材料中的均匀分散以及对水泥基材料微观结构和性能的调控。
[Abstract]:In order to solve the dispersion problem of graphene oxide nanocrystalline (GOO) in cement matrix, The copolymers of acryloxyethyl trimethylammonium chloride (Acryloxyethyl trimethylammonium chloride) and sodium Acrylsulfonate (Sas) were prepared to form PAAS/GO complexes with go nanolamellae and show dispersion. The cement matrix can be formed separately by flower-like crystals, The flexural strength of polyhedron crystal and needle-like crystal is increased by 63.00.44% and 87.9%, respectively, and the compressive strength is increased by 32.64.2% and 71.3%, respectively, and the hydrated crystals are easy to grow in cracks, compared with the normal microstructure of acicular crystal for 28 d. The flexural strength of polyhedron crystal and acicular crystal is increased by 63.00.40% and 87.9% respectively, and the compressive strength is increased by 32.64.2% and 71.3%, respectively. Paas has the effect of repairing structural defects. Paas realizes the homogeneous dispersion of go in cement-based materials and the regulation of microstructure and properties of cement-based materials by forming a complex with go nanoscale.
【作者单位】：陕西科技大学资源与环境学院;
【基金】：国家自然科学基金(21276152)~~
【分类号】：TQ172.1

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