Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite

SUN Shenmei; XU Haijun; SHAO Qiang

doi:10.11949/j.issn.0438-1157.20161275

您当前的位置：

首页 >

文章列表页 >

Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite

更新时间：2025-12-10

- Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite
- CIESC Journal Issue 5, Pages: 2204-2210(2017)
- 作者机构：
  
  广州市建筑科学研究院有限公司建筑材料研究所,广东,广州,510440
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161275
  CLC： U528.042+.2
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
移动端阅览
SUN Shenmei, XU Haijun, SHAO Qiang. Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite[J]. CIESC Journal, 2017, (5): 2204-2210.
DOI：

SUN Shenmei, XU Haijun, SHAO Qiang. Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite[J]. CIESC Journal, 2017, (5): 2204-2210. DOI： 10.11949/j.issn.0438-1157.20161275.

摘要

采用水泥净浆和混凝土试验，详细研究了β-环糊精侧链对聚羧酸减水剂抑制蒙脱土负效应的影响。试验表明，与仅含有聚氧乙烯侧链的传统聚羧酸减水剂相比，蒙脱土对掺加含有β-环糊精侧链的聚羧酸减水剂水泥净浆流动度的负作用影响明显减弱；蒙脱土（1.0%，以砂质量计）存在时，为获得与无蒙脱土时相同的混凝土坍落度，β-环糊精类聚羧酸减水剂的掺量增幅减小，掺加β-环糊精类聚羧酸减水剂的混凝土抗压强度下降幅度减小。结合吸附试验分析，β-环糊精类聚羧酸减水剂抑制蒙脱土负效应能力的增强应归功于其侧链中的β-环糊精基团，β-环糊精基团具有中空筒状的刚性结构，其显著的空间位阻效应将阻止蒙脱土颗粒继续吸附其他β-环糊精类聚羧酸分子，进而提高聚羧酸减水剂抑制蒙脱土负效应的能力。

Abstract

The effect of β-cyclodextrin (β-CD) pendant on the dispersion robustness of polycarboxylate superplasticizers (PCEs) toward montmorillonite was studied via cement paste test and concrete experiment. Compared with conventional PCEs only with PEO chains

the negative effect of montmorillonite on the spread flow of cement paste containing PCEs with β-CD as pendants was weakened. When montmorillonite (1.0%

by mass of sand) was present

the dosage increment of PCEs with β-CD pendants to achieve the same spread flow of concrete as that in the absence of montmorillonite was decreased

the compressive strength decrement of concrete containing PCEs with β-CD pendants became reduced. These results demonstrated that PCEs with β-CD as pendants displayed enhanced robustness toward montmorillonite

which was attributed to β-CD pendant groups based on adsorption measurement. Due to the steric hindrance instigated from its rigid structure of hollow truncated cone

β-CD pendants would decrease the adsorption amount of PCEs on clay by hindering the sorption of polycarboxylate polymers on the surfaces of montmorillonite

leading to enhanced clay tolerance.

关键词

Keywords

references

Views

223

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Preparation and adsorption properties of monolayer polyaniline microsphere arrays

Microporous Noria polymer for selective adsorption and separation of xylene isomers

Research progress on structural modulation and functionalized preparation of phenolic resin-based carbon microspheres

Progress of hemoadsorbent materials for hemoperfusion

Tribological performance of hexagonal boron nitride supported ionic liquid lubricant additives

Related Author

CHEN Shaoyun

XU Dong

CHEN Long

ZHANG Yu

ZHANG Yuanfang

YOU Qingliang

HU Chenglong

CHEN Jian

Related Institution

Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials & Technology, Jianghan University

Instrumental Analysis and Research Center, Sun Yat-sen University

School of Chemistry and Materials Science, University of Science and Technology of China

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology

School of Chemical Engineering and Technology, Tianjin University

⁰