蒙脱土对聚羧酸减水剂的吸附行为研究

材料导报

2021, Vol. 35

Issue (z2): 158-162

无机非金属及其复合材料

蒙脱土对聚羧酸减水剂的吸附行为研究

刘玲¹, 衣军勇¹, 肖刚², 方伟¹, 崔景亮¹, 田洪雷¹, 赵曰琦¹

1 济南交通轨道集团有限公司,济南 250000
2 中铁十局集团有限公司,济南 250010

Adsorption Behavior of Montmorillonite on Polycarboxylate Superplasticizer

LIU Ling¹, YI Junyong¹, XIAO Gang², FANG Wei¹, CUI Jingliang¹, TIAN Honglei¹, ZHAO Yueqi¹

1 Jinan Rail Traffit Group Co. Ltd., Jinan 250000, China
2 China Railway Ten Bureau Group Co., Ltd., Jinan 250010, China

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摘要为揭示聚羧酸减水剂对砂石含泥量敏感机理,本实验研究了聚羧酸减水剂在蒙脱土上的吸附行为。采用紫外分光光度法,系统研究了聚羧酸减水剂溶液浓度、吸附时间和温度对蒙脱土吸附聚羧酸减水剂的过程及其吸附量的影响;利用Fourier红外光谱,表征分析了聚羧酸减水剂嵌入蒙脱土内部微观结构变化。结果表明:聚羧酸减水剂溶液浓度对蒙脱土层间吸附量影响较小;一定浓度的聚羧酸减水剂在蒙脱土表面的吸附量随吸附时间变化具有饱和吸附性;吸附时间小于90 min时,随时间延长,层间吸附量增大变化明显;吸附温度升高,聚羧酸减水剂在蒙脱土上的表面吸附和层间吸附量均增大;吸附聚羧酸减水剂后的蒙脱土,具有明显的减水剂特征吸收峰,聚羧酸减水剂嵌入了蒙脱土内部。聚羧酸减水剂在蒙脱土上的吸附为表面吸附和嵌入吸附。降低聚羧酸减水剂溶液浓度、缩短吸附时间、降低吸附温度,有利于减少聚羧酸减水剂在蒙脱土表面上的吸附;缩短吸附时间和降低吸附温度,可有效减少聚羧酸减水剂嵌入蒙脱土的驱动力,降低嵌入吸附量;最终达到提高聚羧酸减水剂对砂石含泥量适应性的目的。

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	刘玲
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	田洪雷
	赵曰琦

关键词: 聚羧酸减水剂蒙脱土吸附行为

Abstract: Adsorption behavior of polycarboxylate superplasticizer on montmorillonite is investigated to reveal its mechanism of the sensitivity of sand and gravel clay content. By ultraviolet spectrophotometric method, we systematically study the effect of solution concentration, adsorption time and ambient temperature on the process and adsorption amount of the adsorption behavior of polycarboxylate superplasticizer on montmorillonite;by using Fourier infrared spectroscopy,we characterize and analyze the microstructural changes of polycarboxylate superplasticizer embedded montmorillonite.The results showed that: the solution concentration of polycarboxylate has little effect on the interlayer adsorption amount of montmorillonite; the certain solution concentration of polycarboxylate superplasticizer has saturated adsorption capacity in the montmorillonite surface with the change of adsorption time; when the adsorption time is 90 min, the interlayer adsorption amount of montmorillonite reached maximum; the surface and interlayer adsorption amount of the polycarboxylate on the montmorillonite has an increasing trend with the adsorption temperature increasing; the montmorillonite which has absorbed the polycarboxylate has apparent absorption peaks and larger spacing of layer than before,so the polycarboxylate has embedded into montmorillonite. So the process of adsorption of polycarboxylate superplasticizer on montmorillonite includes surface and inserting adsorption.To lower the solution concentration of polycarboxylate, adsorption time and adsorption temperature, it is benefit to reduce the surface adsorption amount of the polycarboxylate on montmorillonite; it can effectively reduce the driving force that the polycarboxylate embedded into montmorillonite and reduce the adsorption amount with adsorption temperature lowering and adsorption time reducing. Finally achieve the purpose of improving adaptation of polycarboxylate superplasticizer to sand clay content.

Key words: polycarboxylate superplasticizer montmorillonite adsorption behavior

发布日期: 2021-12-09

ZTFLH:

TU528.042.2

基金资助: 山东省交通运输科技计划项目(2020B06)

通讯作者: 22695938@qq.com

作者简介: 刘玲,济南轨道交通集团有限公司高级工程师,多年从事城市轨道交通及各种混凝土应用方面研究。在国内外学术期刊上发表论文近20篇;申请国家发明专利并授权7项,作为共同发明人获“中国专利优秀奖”1次;同时,多次参与主持混凝土相关课题项目,研究成果获得“山东省科技进步三等奖”2次;被评为“济南市高层次人才”。研究工作主要围绕城市轨道交通工程,通过先进规划设计、施工工法及检测技术,结合前沿混凝土研究,实现智慧、绿色轨道交通实际应用目的。

引用本文:

刘玲, 衣军勇, 肖刚, 方伟, 崔景亮, 田洪雷, 赵曰琦. 蒙脱土对聚羧酸减水剂的吸附行为研究[J]. 材料导报, 2021, 35(z2): 158-162.
LIU Ling, YI Junyong, XIAO Gang, FANG Wei, CUI Jingliang, TIAN Honglei, ZHAO Yueqi. Adsorption Behavior of Montmorillonite on Polycarboxylate Superplasticizer. Materials Reports, 2021, 35(z2): 158-162.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/Iz2/158

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