Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants

ZHANG Guanghua; QU Qianqian; ZHU Junfeng; WANG Peng; FU Xiaolong; WEI Yingfei

doi:10.3969/j.issn.0438-1157.2014.08.060

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Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants

更新时间：2025-12-10

- Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants
- CIESC Journal Issue 8, Pages: 3290-3297(2014)
- 作者机构：
  
  教育部轻化工助剂化学与技术重点实验室, 陕西科技大学,陕西,西安,710021
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.08.060
  CLC： Q536.9
- Online First：05 August 2014，
  
  Published：05 August 2014
- 稿件说明：
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ZHANG Guanghua, QU Qianqian, ZHU Junfeng, et al. Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants[J]. CIESC Journal, 2014, (8): 3290-3297.
DOI：

ZHANG Guanghua, QU Qianqian, ZHU Junfeng, et al. Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants[J]. CIESC Journal, 2014, (8): 3290-3297. DOI： 10.3969/j.issn.0438-1157.2014.08.060.

摘要

以甲基丙烯酸（MAA）和 4 种不同侧链长度的甲氧基聚乙二醇（MPEG相对分子质量分别为350，500，750，1000）先聚合得到酯化大单体（MPEGMAA），再以甲基丙烯酸，烯丙基磺酸钠（SAS）为单体，在引发剂过硫酸钾，阻聚剂对苯二酚作用下聚合得到 4 种具有不同侧链长度的聚羧酸盐分散剂。通过红外（FT-IR）、核磁共振氢谱（1H NMR）和凝胶渗透色谱（GPC）对聚合物的结构、相对分子质量及其分布进行了表征和分析，并将其作用于彬长煤制浆，考察了浆体的表观黏度、流变性、zeta电位、吸附性以及最大成浆浓度和稳定性，测定其与煤的接触角，并通过X射线光电子能谱（XPS）分析，得出煤粒表面吸附分散剂后的吸附层厚度为 6.12 nm。结果表明，侧链长度为SAS/MAA/MPEGMAA750的聚羧酸盐分散剂具有良好的润湿和吸附效果，对彬长煤具有更好的降黏、分散和稳定作用。

Abstract

The esterified macromonmer (MPEGMAA) was obtained by esterification ofmethoxy polyethylene glycol (MPEG)withfour kinds of different side chain lengthsand methacrylic acid (MAA).Four kinds of different side chain lengths of polycarboxylate dispersants were prepared from esterified macromonmer (MPEGMAA)

methacrylic acid (MAA)

allyl sulfonate (SAS) as monomers

potassium persulfate (K2S2O8) as initiator and hydroquinone as inhibitor. Their structures

molecular weights and distributions were characterized and analyzed by FT-IR

1H NMR and gel permeation chromatography (GPC). The dispersants were used for Binchang coal

and apparent viscosity

rheology

zeta potential

adsorption

maximum slurry concentration and stability of the slurry were investigated. The contact angles between coal surface and dispersant were measured

and the surface of coal particles after adsorbing the dispersant with was analyzed with X-ray photoelectron spectroscopy (XPS)

with the thickness of adsorption layer of 6.12 nm. The polycarboxylate dispersant with the length of side chain SAS/MAA/MPEGMAA750 showed good wetting and adsorption

as well as better function of viscosity reduction

dispersion and stabilization on Binchang coal.

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