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Preparation and Properties of Different Polyether-Type Defoamers for Concrete

In this study, a series of polyether-type defoamers for concrete which consist of the same alkyl chain (hydrophobic part) but different polyether chains (hydrophilic part) was prepared, and the structure–property relationship of the defoamers was investigated for the first time. Using oleyl alcohol...

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Autores principales: Qiao, Min, Wu, Jingzhi, Gao, Nanxiao, Shan, Guangcheng, Shen, Fei, Chen, Jian, Zhu, Bosong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9656246/
https://www.ncbi.nlm.nih.gov/pubmed/36363083
http://dx.doi.org/10.3390/ma15217492
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author Qiao, Min
Wu, Jingzhi
Gao, Nanxiao
Shan, Guangcheng
Shen, Fei
Chen, Jian
Zhu, Bosong
author_facet Qiao, Min
Wu, Jingzhi
Gao, Nanxiao
Shan, Guangcheng
Shen, Fei
Chen, Jian
Zhu, Bosong
author_sort Qiao, Min
collection PubMed
description In this study, a series of polyether-type defoamers for concrete which consist of the same alkyl chain (hydrophobic part) but different polyether chains (hydrophilic part) was prepared, and the structure–property relationship of the defoamers was investigated for the first time. Using oleyl alcohol (OA) as the starting agent (alkyl chain), the polyether defoamers with different polyether chains were prepared by changing the amount and sequence of ethylene oxide (EO) and propylene oxide (PO) units. The properties of different defoamers were tested in aqueous solutions, and fresh and hardened mortars; the structure–property relationship of the defoamers was thus studied. The results indicated that the defoaming capacity of the polyether defoamers decreased with an increased EO amount, and the defoamers linked with both EO and PO units (PO before EO) had a stronger defoaming capacity than those linked with EO only. This study is beneficial for the development and applications of novel synthetic polyether-type defoamers for concrete.
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spelling pubmed-96562462022-11-15 Preparation and Properties of Different Polyether-Type Defoamers for Concrete Qiao, Min Wu, Jingzhi Gao, Nanxiao Shan, Guangcheng Shen, Fei Chen, Jian Zhu, Bosong Materials (Basel) Article In this study, a series of polyether-type defoamers for concrete which consist of the same alkyl chain (hydrophobic part) but different polyether chains (hydrophilic part) was prepared, and the structure–property relationship of the defoamers was investigated for the first time. Using oleyl alcohol (OA) as the starting agent (alkyl chain), the polyether defoamers with different polyether chains were prepared by changing the amount and sequence of ethylene oxide (EO) and propylene oxide (PO) units. The properties of different defoamers were tested in aqueous solutions, and fresh and hardened mortars; the structure–property relationship of the defoamers was thus studied. The results indicated that the defoaming capacity of the polyether defoamers decreased with an increased EO amount, and the defoamers linked with both EO and PO units (PO before EO) had a stronger defoaming capacity than those linked with EO only. This study is beneficial for the development and applications of novel synthetic polyether-type defoamers for concrete. MDPI 2022-10-25 /pmc/articles/PMC9656246/ /pubmed/36363083 http://dx.doi.org/10.3390/ma15217492 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Qiao, Min
Wu, Jingzhi
Gao, Nanxiao
Shan, Guangcheng
Shen, Fei
Chen, Jian
Zhu, Bosong
Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title_full Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title_fullStr Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title_full_unstemmed Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title_short Preparation and Properties of Different Polyether-Type Defoamers for Concrete
title_sort preparation and properties of different polyether-type defoamers for concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9656246/
https://www.ncbi.nlm.nih.gov/pubmed/36363083
http://dx.doi.org/10.3390/ma15217492
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