Preparation of Sodium Lignosulphonate-co-Polycarboxylic Acid Water Reducing Agent

doi:10.3969/j.issn.1006-396X.2012.03.001

Journal of Petrochemical Universities ›› 2012, Vol. 25 ›› Issue (3): 1-5.DOI: 10.3969/j.issn.1006-396X.2012.03.001

1. College of Environment & Resources, Fuzhou University, Fuzhou Fujian 350108, P.R.China; 2. Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou Fujian 350108, P.R. China

Received:2011-12-28 Revised:1900-01-01 Published:2012-06-25 Online:2012-06-25

木质素磺酸钠聚羧酸减水剂的制备研究

张育乾^1,2,刘志鹏^1,2,刘明华^1,2*

1. 福州大学环境与资源学院，福建福州 350108； 2. 福建省生物质资源化技术开发基地，福建福州 350108

作者简介:张育乾（１９８７－），男，湖南江华县，在读硕士
基金资助:
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。

Abstract

Abstract: 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.

Key words: Sodium lignosulphonate, Polycarboxylic acid monomer, Water reducing agent, The fluidity of cement paste

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。

关键词: 木质素磺酸钠 , 聚羧酸单体 , 减水剂 , 水泥净浆流动度

ZHANG Yu-qian, LIU Zhi-peng,LIU Ming-hua. Preparation of Sodium Lignosulphonate-co-Polycarboxylic Acid Water Reducing Agent[J]. Journal of Petrochemical Universities, 2012, 25(3): 1-5.

张育乾,刘志鹏,刘明华. 木质素磺酸钠聚羧酸减水剂的制备研究[J]. 石油化工高等学校学报, 2012, 25(3): 1-5.