摘要
以木质素磺酸钠作为聚羧酸减水剂的合成原料,在水溶液中与聚羧酸减水剂单体进行接枝共聚反应,制得木质素磺酸钠聚羧酸减水剂,并对其制备工艺进行优化,得到最优实验方案为:木质素磺酸钠质量分数为16%,PEG-1000和MA的物质的量比为0.9∶1.0,丙烯酸与马来酸酐物质的量比为2.8∶1.0,聚合时间为3h,酯化时间为4h,最优条件下制得的产品的水泥净浆流动度(掺量为0.2%,水灰质量比为0.29)为241mm。红外测试表明木质素磺酸钠分子结构上成功接上了聚氧乙烯基、酯基、羧酸基及酰胺基等官能团。
The sodium lignosulphonate--co--polycarboxylic acid water reducer was prepared by graft copolymerization of polycarboxylic acid monomer with raw material of sodium lignosulphonate in aqueous solutions. The processe was optimized, and the optimal conditions included 16% of sodium lignosulphonate dosage, 0. 9 ： 1.0 of the molar ratio of PEG--1000 and MA, 2.8 ： 1.0 of molar ratio of AA and MA, 3 h of polymerization time, 4 h of esterification time. Under the above optimum conditions, the obtained product is 241 mm of the fluidity of cement paste when the dosage was 0.2% and the water cement ratio was 0.29. FT--IR spectra illustrated that functional groups including polyoxyethylene group, ester group, carboxylic group, acylamino etc have been grafted to sodium lignosulphonate successfully.
出处
《石油化工高等学校学报》
CAS
2012年第3期1-5,共5页
Journal of Petrochemical Universities
基金
福建省高校产学合作科技重大项目(2010H6011)
福建省企业技术创新公共服务平台建设专项
关键词
木质素磺酸钠
聚羧酸单体
减水剂
水泥净浆流动度
Sodium lignosulphonate
Polycarboxylic acid monomer
Water reducing agent
The fluidity of cement paste
