Page 180 - 201812

第 35 卷第 12 期 精 细 化 工 Vol.35, No.12
2018 年 12 月 FINE CHEMICALS Dec. 2018

建筑用化学品
聚醚改性聚天冬氨酸减水剂的制备及其性能

*
于 梦，王菲菲，赵彦生
（太原理工大学 化学化工学院，山西 太原 030024）

摘要：以聚琥珀酰亚胺（PSI）和端氨基聚醚（M2005）为原料，合成了聚醚改性聚天冬氨酸减水剂（PEMPASP），
采用 FTIR 对 PEMPASP 进行了结构表征，考察了不同减水剂及其用量对水泥净浆流动度和胶砂强度的影响；通
过对 TOC、Zeta 电位、XRD 以及 TG-DSC 分析，分析了 PEMPASP 减水剂的作用机理。结果表明：当 n（PSI）∶
n（M2005）=1∶0.14、PEMPASP 掺量为水泥质量的 0.35%时，水泥的净浆比掺加聚天冬氨酸（PASP）的水泥
净浆流动度提高了 189%，在 PEMPASP 质量分数为水泥的 0.25%时，水泥胶砂抗折强度比空白水泥增长了 15.6%，
比含有 PASP 的水泥胶砂增长了 17%；由于在 PASP 分子链上引入长侧链聚醚链，改变了减水剂分子上的电荷密
度和侧链结构，影响了减水剂对水泥颗粒的静电作用和位阻作用，进而改善了吸附、分散以及水泥的水化作用，
提高了减水剂的综合性能。
关键词：聚天冬氨酸；聚醚；减水剂；水化；流动度；建筑用化学品
中图分类号：TU528.42 文献标识码：A 文章编号：1003-5214 (2018) 12-2148-07

Synthesis and Properties of Polyether-Modified
Poly(aspartic acid) Superplasticizer

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YU Meng, WANG Fei-fei, ZHAO Yan-sheng
（College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China）

Abstract: Polyether-modified poly (aspartic acid) superplasticizer (PEMPASP) was synthesized by using
polysuccinimide (PSI) and polyetheramine (M2005) as materials and characterized by FTIR. The effects of
different superplasticizers and their dosage on the fluidity and flexural strength of cement pastes were
discussed. The mechanism of PEMPASP superplasticizer was studied by TOC, Zeta potential, XRD and
TG-DSC. The results showed that when the molar ratio of PSI to M2005 was 1∶0.14, the prepared
superplasticizer exhibited good performance. The fluidity of cement paste containing 0.35% PEMPASP was
increased by 189% compared with that of cement paste containing polyaspartic acid (PASP). When the
mass fraction of this PEMPASP was 0.25% of cement, the flexural strength of cement mortar was increased
by 15.6% compared with that of blank cement and 17% higher than that of cement mortar containing PASP.
The introduction of long-chain polyether can change the charge density and side chain structure of
superplasticizer, which affects the electrostatic effect and steric hindrance of superplasticizer on the cement
particles. Thus, the adsorption, dispersion and the hydration of cement are improved, and the
comprehensive performance of superplasticizeris improved.
Key words: poly(aspartic acid); polyether; superplasticizer; hydration; fluidity; building chemicals
Foundation items: National Natural Science Foundation of China (21304066); Scientific and Technological
Projects in Shanxi Province (20100311117)

[2]
减水剂是一种水泥外加剂，其作用是可以在较 产生的空间位阻 。而且，随着吸附层厚度或密度
[3]
[1]
低的水灰比下使混凝土具有较高的性能 。高效减 的增加，稳定性得到提高 。具有带电基团的高效
水剂的分散作用主要是在水泥颗粒上的吸附和侧链 减水剂可以通过静电斥力影响其在水泥颗粒表面上

收稿日期：2018-03-09; 定用日期：2018-06-14; DOI: 10.13550/j.jxhg.20180161
基金项目：国家自然科学基金青年基金项目（21304066）；山西省科技攻关项目（20100311117）
作者简介： 于 梦（1993—），女，硕士生。联系人：赵彦生（1962—），男，教授，博士生导师，电话：13603534065，E-mail：zhaoyansheng@tyut.edu.cn。