聚羧酸减水剂/氧化石墨烯复合物的制备与性能

Preparation and Properties of Polycarboxylate Superplasticizer-Graphene Oxide Composite

摘要:

通过氧化石墨烯（GO）与聚羧酸系减水剂单体甲基丙烯酸聚乙二醇单甲醚（MAAPEGME）、甲基丙烯酸（MAA）及甲基丙烯磺酸盐（SMAS）进行自由基共聚反应制备了氧化石墨烯与聚丙烯酸系减水剂（PCs）单体的共聚物（GO-PCs），旨在解决GO掺入水泥基材料时存在的分散不均匀及流动性降低的问题，制备GO-PCs时各组分的质量比为m（MAAPEGME）: m（MAA）: m（MAS）: m（GO）=17:2:1:0.2。检测结果表明GO与单体之间发生了共聚反应，GO纳米片层均匀的分布PCs中，达到了GO在水泥材料中分布均匀、不影响水泥流动性及增强增韧的目的，SEM形貌说明GO-PCs对水泥浆体的微观结构有较好的调控作用，研究结果对于制备高性能长寿命混凝土具有积极的意义。

Abstract:

The copolymer (GO-PCs) of graphene oxide (GO) and monomers of polycarboxylate superplasticizer (PCs) was synthesized by free-radical copolymerization of GO and methylacrylic acid polyethylene glycol single methyl ether (MAAPEGME), methacrylic acid (MAA) as well as sodium methallyl sulfonate (SMAS). The product was designed to solve application problems of GO in cement based materials, such as dispersion unevenly and reducing of cement paste fluidity. The GO-PCs was prepared by the weight ratios of MAAPEGME, MAA, SMAS and GO of 17:2:1:0.2. The tested results indicated that the copolymerization of GO and monomers were taken placed and GO naosheets were dispersed uniformly among PCs. The results indicated that the aim with GO to unevenly disperse in cement materials and reinforce/toughen cement materials as well as do not impact its fluidity have been achieved. The results of SEM showed that GO-PCs have stronger controlling for microstructure of cement materials. The research result has positive meaning to preparation of high-performance and long-life concrete.