Effect of molecular structure of polycarboxylate ether superplasticizer on its tolerance to montmorillonite

Yihan Ma; Dengwu Jiao; Shengnan Sha; Beibei Zhou; Caijun Shi

doi:10.1016/j.conbuildmat.2023.131966

Effect of molecular structure of polycarboxylate ether superplasticizer on its tolerance to montmorillonite

Yihan Ma
, Dengwu Jiao
, Shengnan Sha
, Beibei Zhou
, Caijun Shi^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

Two groups of polycarboxylate ether (PCE) superplasticizers with different side chain lengths and densities were synthesized and characterized. Their dispersion capability was evaluated by the time-dependent rheological properties of cement pastes without and with montmorillonite (MMT). The adsorption and intercalation behaviors of these PCEs on MMT were investigated and their interactions with MMT were revealed. Results indicate that PCE with shorter side chains or higher side chain densities exhibits stronger tolerance to MMT than that with longer side chains or lower side chain densities, when they have comparable dispersion capability to cement particles. PCE with shorter side chains has lower adsorption on pure MMT and decreases the proportion of intercalated MMT. The adsorption of PCE on MMT decreases with the increase of side chain density, but the intercalation proportion shows an opposite behavior. The introduction of more side chains increases the intercalation efficiency, and decreases the consumption of MMT to PCE molecules. The adsorption kinetics of PCEs on cement or MMT system are well fitted by the pseudo-second-order adsorption kinetic equation, regardless of PCE type. © 2023 Published by Elsevier Ltd.

Original language	English
Article number	131966
Journal	Construction and Building Materials
Volume	392
Online published	6 Jun 2023
DOIs	https://doi.org/10.1016/j.conbuildmat.2023.131966
Publication status	Published - 15 Aug 2023
Externally published	Yes

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Publisher Copyright:
© 2023

Funding

The authors gratefully acknowledge the financial supports from the Ministry of Science and Technology under Project No. 2018YFC0705400.

Research Keywords

Density
Length
Montmorillonite
Polycarboxylate ether superplasticizers
Side chain

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title = "Effect of molecular structure of polycarboxylate ether superplasticizer on its tolerance to montmorillonite",

abstract = "Two groups of polycarboxylate ether (PCE) superplasticizers with different side chain lengths and densities were synthesized and characterized. Their dispersion capability was evaluated by the time-dependent rheological properties of cement pastes without and with montmorillonite (MMT). The adsorption and intercalation behaviors of these PCEs on MMT were investigated and their interactions with MMT were revealed. Results indicate that PCE with shorter side chains or higher side chain densities exhibits stronger tolerance to MMT than that with longer side chains or lower side chain densities, when they have comparable dispersion capability to cement particles. PCE with shorter side chains has lower adsorption on pure MMT and decreases the proportion of intercalated MMT. The adsorption of PCE on MMT decreases with the increase of side chain density, but the intercalation proportion shows an opposite behavior. The introduction of more side chains increases the intercalation efficiency, and decreases the consumption of MMT to PCE molecules. The adsorption kinetics of PCEs on cement or MMT system are well fitted by the pseudo-second-order adsorption kinetic equation, regardless of PCE type. {\textcopyright} 2023 Published by Elsevier Ltd.",

keywords = "Density, Length, Montmorillonite, Polycarboxylate ether superplasticizers, Side chain",

author = "Yihan Ma and Dengwu Jiao and Shengnan Sha and Beibei Zhou and Caijun Shi",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = aug,

day = "15",

doi = "10.1016/j.conbuildmat.2023.131966",

language = "English",

volume = "392",

journal = "Construction and Building Materials",

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TY - JOUR

T1 - Effect of molecular structure of polycarboxylate ether superplasticizer on its tolerance to montmorillonite

AU - Ma, Yihan

AU - Jiao, Dengwu

AU - Sha, Shengnan

AU - Zhou, Beibei

AU - Shi, Caijun

PY - 2023/8/15

Y1 - 2023/8/15

N2 - Two groups of polycarboxylate ether (PCE) superplasticizers with different side chain lengths and densities were synthesized and characterized. Their dispersion capability was evaluated by the time-dependent rheological properties of cement pastes without and with montmorillonite (MMT). The adsorption and intercalation behaviors of these PCEs on MMT were investigated and their interactions with MMT were revealed. Results indicate that PCE with shorter side chains or higher side chain densities exhibits stronger tolerance to MMT than that with longer side chains or lower side chain densities, when they have comparable dispersion capability to cement particles. PCE with shorter side chains has lower adsorption on pure MMT and decreases the proportion of intercalated MMT. The adsorption of PCE on MMT decreases with the increase of side chain density, but the intercalation proportion shows an opposite behavior. The introduction of more side chains increases the intercalation efficiency, and decreases the consumption of MMT to PCE molecules. The adsorption kinetics of PCEs on cement or MMT system are well fitted by the pseudo-second-order adsorption kinetic equation, regardless of PCE type. © 2023 Published by Elsevier Ltd.

AB - Two groups of polycarboxylate ether (PCE) superplasticizers with different side chain lengths and densities were synthesized and characterized. Their dispersion capability was evaluated by the time-dependent rheological properties of cement pastes without and with montmorillonite (MMT). The adsorption and intercalation behaviors of these PCEs on MMT were investigated and their interactions with MMT were revealed. Results indicate that PCE with shorter side chains or higher side chain densities exhibits stronger tolerance to MMT than that with longer side chains or lower side chain densities, when they have comparable dispersion capability to cement particles. PCE with shorter side chains has lower adsorption on pure MMT and decreases the proportion of intercalated MMT. The adsorption of PCE on MMT decreases with the increase of side chain density, but the intercalation proportion shows an opposite behavior. The introduction of more side chains increases the intercalation efficiency, and decreases the consumption of MMT to PCE molecules. The adsorption kinetics of PCEs on cement or MMT system are well fitted by the pseudo-second-order adsorption kinetic equation, regardless of PCE type. © 2023 Published by Elsevier Ltd.

KW - Density

KW - Length

KW - Montmorillonite

KW - Polycarboxylate ether superplasticizers

KW - Side chain

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U2 - 10.1016/j.conbuildmat.2023.131966

DO - 10.1016/j.conbuildmat.2023.131966

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85161320225

SN - 0950-0618

VL - 392

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 131966

ER -

Effect of molecular structure of polycarboxylate ether superplasticizer on its tolerance to montmorillonite

Abstract

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Research Keywords

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