PCs/GO复合物对水泥基材料微观结构和力学性能的影响

材料导报, 2017, 31(6): 125-135. doi: 10.11896/j.issn.1005-023X.2017.06.025

PCs/GO复合物对水泥基材料微观结构和力学性能的影响

吕生华 ^1, , 朱琳琳 ^2, , 贾春茂 ^3, , 李莹 ^4, , 贺亚亚 ^5, , 赵浩然 ^6, , 邓丽娟 ^7,

1.陕西科技大学轻工科学与工程学院,西安,710021

2.陕西科技大学轻工科学与工程学院,西安,710021

3.陕西科技大学化学与化工学院,西安,710021

4.陕西科技大学轻工科学与工程学院,西安,710021

5.陕西科技大学轻工科学与工程学院,西安,710021

6.陕西科技大学轻工科学与工程学院,西安,710021

7.陕西科技大学轻工科学与工程学院,西安,710021

基金项目: 国家自然科学基金面上项目(21276152)

关键词：氧化石墨烯 , 水泥微观结构 , 自修复作用 , 增强作用

Influence of PCs/GO Composites on Microstructure and Mechanical Properties of Cement Based Materials

Keywords： graphene oxide , cement microstructure , self-repairing effects , reinforcement

用氧化石墨烯(GO)纳米片层分散液与甲基丙烯酸聚氧乙烯单甲醚(MPE)、甲基丙烯酸(MAA)和丙烯磺酸盐(AA)进行插层聚合反应制备了聚羧酸减水剂(PCs)与GO的插层复合物(PCs/GO),将其应用于水泥基复合材料.结果表明,PCs/GO能够调控水泥基体成为由多面体状产物构成的规整的微观结构,具有显著的增强增韧效果,同时也发现PCs/GO能够在水泥基体的裂缝和孔洞处产生花状和多面体状晶体,具有修复裂缝、孔洞的功效.研究结果对于制备无裂缝及高强度、高韧性和高耐久性水泥基复合材料具有积极的意义.

The composites of polycarboxylate superplasticizer (PCs) and raphene oxide (GO) (PCs/GO) was prepared by intercalation of GO and methacrylic acid (MAA),sodium allyl sulfonate (SAS) and methacrylate polyoxyethylene ether (MPE).The application results indicated that PCs/GO could regulate to form ordered micromorphology consisted by polyhedron products,which exhibited obvious reinforcing and toughening effect.Meanwhile,it was found that GO could generate flower-like and polyhedron products in the holes and cracks to repair the holes and cracks.The research result has positive significance to preparation of the cement composites with defect-free structure,high strength,high toughness as well as long service life.

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