Enhancement clay tolerance of PCE by lignin-based polyoxyethylene ether in montmorillonite-contained paste

Li Xiao-Kang; Zheng Da-Feng; Zheng Tao; Lin Xu-Liang; Lou Hong-ming; Qiu Xue-qing

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Enhancement clay tolerance of PCE by lignin-based polyoxyethylene ether in montmorillonite-contained paste

机译：基于木质素的聚氧乙烯醚在蒙脱土粘贴中增强PCE的粘土耐受性

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摘要

The dispersion ability of polycarboxylate ether (PCE) in fresh concrete is much impeded by clay impurities. To improve the dispersion of PCE in the clay-contained concrete, lignin-based polyoxyethylene ether (PEG-grafted-lignin) was synthesized through polyethylene glycol (PEG) grafted to kraft lignin (KL). The results showed that PEG-grafted-lignin increased the fluidity of MMT-contained cement paste when combined with PCE. It improved the rheological properties of MMT-contained cement paste by reducing the yield stress and the rheological behavior index. The adsorption of PEG-grafted-lignin on MMT was more quickly than KL and the equilibrium adsorption amount was 31.43 mg/g at an initial concentration of 100 mg/L. XRD revealed that PEG-grafted-lignin had inserted into the interlayer structure of MMT, while DLS disclosed the spatial effect of PEG-grafted-lignin was much stronger than PCE. This study put forward a new method in the anti-sludge study of PCE. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

机译：粘土杂质严重阻碍了聚羧酸醚（PCE）在新拌混凝土中的分散能力。为了改善四氯乙烯在粘土混凝土中的分散性，将聚乙二醇（PEG）接枝到硫酸盐木质素（KL）上，合成了木质素基聚氧乙烯醚（PEG接枝木质素）。结果表明，PEG接枝木质素能提高蒙脱土水泥浆体的流动性。通过降低屈服应力和流变性能指数，改善了含蒙脱土水泥浆体的流变性能。PEG接枝木质素在蒙脱土上的吸附速度比KL快，初始浓度为100mg/L时，平衡吸附量为31.43mg/g。XRD显示PEG接枝木质素已插入蒙脱土的层间结构，而DLS显示PEG接枝木质素的空间效应比PCE强得多。本研究为PCE的抗污泥研究提供了一种新方法。（C） 2017年，韩国工业与工程化学学会。由爱思唯尔B.V.出版。版权所有。

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来源
《Journal of industrial and engineering chemistry》 |2017年第1期|共8页
作者
Li Xiao-Kang; Zheng Da-Feng; Zheng Tao; Lin Xu-Liang; Lou Hong-ming; Qiu Xue-qing;
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作者单位

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

South China Univ Technol Coll Chem &

Chem Engn Guangzhou Guangdong Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类化学工业;
关键词
PEG-grafted-lignin; MMT-contained cement paste; Anti-sludge; Rheological behavior; Adsorption;

机译：None;

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Enhancement clay tolerance of PCE by lignin-based polyoxyethylene ether in montmorillonite-contained paste

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