文献类型：期刊文献

英文题名：Effect of Density of Acrylic Acid Ester on Sulfonate-Modified Polycarboxylate Superplasticizers on Cementitious Systems

作者：Xie, Yuxiang Zhang, Zixuan Chen, Yujie Ren, Xu Liu, Yuan Tao, Jia Liu, Runxia Li, Min Li, Ziwei

第一作者：Xie, Yuxiang

通信作者：Li, ZW[1]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China;[2]Guizhou Univ, North Alabama Int Coll Engn & Technol, Guiyang 550025, Peoples R China;[3]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550025, Peoples R China;[4]China Railway Fifth Bur Grp Co Ltd, Guiyang 550003, Peoples R China;[5]Guizhou Tianwei Bldg Mat Technol Co Ltd, Guiyang 550025, Peoples R China

第一机构：Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China.

年份：2024

卷号：16

期号：23

外文期刊名：POLYMERS

收录：;EI(收录号：20245117535917);Scopus(收录号：2-s2.0-85211930502);WOS:【SCI-EXPANDED(收录号:WOS:001376184700001)】；

基金：This research was funded by National Natural Science Foundation of China (22168013, 22279024), Key Laboratory of Carbon-based Energy Molecular Chemical Utilization Technology in Guizhou Province (2023008), Science and Technology Department of Guizhou Province (Qian Ke He Ji Chu-ZK [2021] Yi Ban 283), Natural Science Foundation of Guizhou (ZK [2022]074), National Foreign Expert Project (G2023038002L), China Railway Fifth Bureau Group Co., LTD (China Railway Fifth Ke He Zi [2019] 22), Guizhou Tianwei Building Materials Technology Co., LTD (Tianwei Ke He 2021-02). The APC was funded by Yuxiang Xie.

语种：英文

外文关键词：polycarboxylate superplasticizer; conformation; anion density; adsorption capacity; viscosity reduction

摘要：To tackle high viscosity in fresh concretes, especially high-performance concrete, the research of polycarboxylate superplasticizers (PCEs) is relevant. By designing the molecular structure of PCEs, problems such as pumping difficulties in high viscosity of high-performance concrete can be solved. Therefore, in this paper, a suite of novel viscosity reducing PCEs containing sulfonic acid groups and different acrylate densities were synthesized on the basis of inventive molecular structure design, and characterized to determine the predicted structure. The maximum adsorption, the best fluidity, and the Minimum zeta potential value can be seen for PCEs with a small number of ester groups (PCE-MA0.5) due to the combination of the rigidity of its backbone and the density of the adsorption groups. Moreover, the investigation of working mechanism showed the introduction of ester groups can significantly reduce viscosity, but also reduces the adsorption capacity. This research aims to propose a feasible method for synthesizing PCE with superior processability and viscosity reduction capability in cement and concrete.