Synthesis and Properties of Amphoteric Superplasticizer

被引：0

作者：

Guo, Wenjuan ^{[1
]}

Sun, Na ^{[1
]}

Yang, Tao ^{[1
]}

Pei, Meishan ^{[1
]}

Wang, Yingfei ^{[2
]}

机构：

[1] Univ Jinan, Sch Chem & Chem Engn, Jinan, Peoples R China

[2] China Commun Construct Fourth Harbor Engn Co Ltd, Engn Technol Res Co Ltd, Wuhan, Peoples R China

来源：

ACI MATERIALS JOURNAL | 2011年 / 108卷 / 06期

基金：

中国国家自然科学基金;

关键词：

adsorption; amphoteric; superplasticizer; zeta potential; POLYCARBOXYLATE-TYPE SUPERPLASTICIZER; CEMENT; PERFORMANCE; CHAINS; DISPERSION; ADSORPTION; HYDRATION; GLYCOL); FORCE; PASTE;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A series of amphoteric polycarboxylic acid-based superplasticizers (APCs) was synthesized with different side chain lengths n(EO) from seven to 56 and characterized by FTIR spectra. The dispersing effectiveness of the APCs was assessed by the flow of paste. The amount of superplasticizers adsorbed on the cement significantly decreases with increasing side chain length n(EO). The properties of an anionic polycarboxylic acid-based superplasticizer (PCE) were also tested to be compared with APCs. The adsorption amount of APCs was larger than that of an anionic polycarboxylic acid-based superplasticizer (PC). Zeta potential measurements using the electroacoustic method indicate that the steric repulsion among the cement particles carrying adsorbed polymer molecules is the main force for dispersion.

引用

页码：614 / 618

页数：5

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