SAS/MAA/MPEGMAA聚羧酸盐分散剂的制备与性能

doi:10.3969/j.issn.0438-1157.2014.08.060

化工学报 ›› 2014, Vol. 65 ›› Issue (8): 3290-3297.DOI: 10.3969/j.issn.0438-1157.2014.08.060

• 材料化学工程与纳米技术 • 上一篇下一篇

SAS/MAA/MPEGMAA聚羧酸盐分散剂的制备与性能

张光华, 屈倩倩, 朱军峰, 王鹏, 付小龙, 卫颖菲

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

收稿日期:2013-09-26 修回日期:2014-01-21 出版日期:2014-08-05 发布日期:2014-08-05
通讯作者: 屈倩倩
基金资助:
国家自然科学基金项目（21176148，21303098）；陕西省教育厅重点实验室项目（2011JS020）。

Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants

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

Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China

Received:2013-09-26 Revised:2014-01-21 Online:2014-08-05 Published:2014-08-05
Supported by:
supported by the National Natural Science Foundation of China(21176148,21303098) and the Shaanxi Provincial Department of Education Key Laboratory Project(2011JS020).

摘要/Abstract

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。

关键词: 聚羧酸盐, 分散剂, 甲氧基聚乙二醇, 侧链长度

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.

Key words: polycarboxylate, dispersant, methoxy polyethylene glycol, side chain length

中图分类号:

TQ536.9

张光华, 屈倩倩, 朱军峰, 王鹏, 付小龙, 卫颖菲. SAS/MAA/MPEGMAA聚羧酸盐分散剂的制备与性能[J]. 化工学报, 2014, 65(8): 3290-3297.

ZHANG Guanghua, QU Qianqian, ZHU Junfeng, WANG Peng, FU Xiaolong, WEI Yingfei. Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants[J]. CIESC Journal, 2014, 65(8): 3290-3297.

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SAS/MAA/MPEGMAA聚羧酸盐分散剂的制备与性能

Synthesis and performance of SAS/MAA/MPEGMAA polycarboxylate dispersants

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