β-环糊精侧链对聚羧酸减水剂抑制蒙脱土的影响

孙申美; 徐海军; 邵强

doi:10.11949/j.issn.0438-1157.20161275

您当前的位置：

首页 >

文章列表页 >

β-环糊精侧链对聚羧酸减水剂抑制蒙脱土的影响

材料化学工程与纳米技术 | 更新时间：2025-12-10

- β-环糊精侧链对聚羧酸减水剂抑制蒙脱土的影响
- Effect of β-cyclodextrin pendant on dispersion robustness of polycarboxylate superplasticizers toward montmorillonite
- 化工学报 2017年第5期页码：2204-2210
- 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
  中图分类号： U528.042+.2
- 网络首发：2017-05-05，
  
  纸质出版：2017-05-05
- 稿件说明：
移动端阅览
孙申美, 徐海军, 邵强. β-环糊精侧链对聚羧酸减水剂抑制蒙脱土的影响[J]. 化工学报, 2017,(5):2204-2210.

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.
孙申美, 徐海军, 邵强. β-环糊精侧链对聚羧酸减水剂抑制蒙脱土的影响[J]. 化工学报, 2017,(5):2204-2210. DOI： 10.11949/j.issn.0438-1157.20161275.

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

浏览量

223

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

单层聚苯胺微球阵列结构的制备及其吸附性能

微孔Noria聚合物用于二甲苯异构体吸附分离研究

酚醛树脂基炭微球结构调控与功能化制备研究进展

血液灌流吸附剂材料的研究进展

纳米六方氮化硼负载离子液体润滑添加剂的摩擦学特性