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Investigation on Mechanical Performance and Flame-Retardancy of Polymer Cement-Based Coatings with Ettringite Modified by Amphiphilic Group.

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Title: Investigation on Mechanical Performance and Flame-Retardancy of Polymer Cement-Based Coatings with Ettringite Modified by Amphiphilic Group.
Authors: Yin, Fangzhou1 (AUTHOR), Ma, Kai1 (AUTHOR), Gan, Xingyu1 (AUTHOR), Li, Laibo1 (AUTHOR), Zhang, Haiming1 (AUTHOR) zhmqlu@163.com, Lu, Lingchao1 (AUTHOR)
Source: Polymers (20734360). Apr2026, Vol. 18 Issue 7, p863. 13p.
Subjects: Ettringite, Amphiphiles, Surface preparation, Cement composites, Fireproofing, Aluminum hydroxide, Mechanical behavior of materials
Abstract: Polymer cement-based coatings (PCC) have great potential in protecting underground structures, while their flame -retardancy is limited by the flammability of the polymer components. Developing multifunctional inorganic fillers that can enhance both mechanical properties and flame retardancy is crucial for improving the safety and durability of the coatings. In this study, an ettringite (AFt) modified by amphiphilic group and aluminum hydroxide (AH) was subjected to surface functionalization treatment and then incorporated into the PCC to enhance the overall performance of the material. The tensile strength and bond strength of the coatings modified by amphiphilic group with AFt were increased by 27.7% and 22.4%, respectively. Meanwhile, the flame burn time, flameless burn time, and carbonization length were reduced by 89.1%, 80.6%, and 90.2%, respectively, and the limiting oxygen index (LOI) increased by 28.9%. The amphiphilic groups act as molecular bridges that couple the inorganic modified AFt with the organic VAE phase, thereby strengthening the organic–inorganic interface and promoting a more integrated polymer–cement network. Meanwhile, the well-dispersed inorganic phases provide endothermic dehydration and a protective residue during heating, jointly improving the mechanical reliability and fire safety of the PCC. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 192959299
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  Label: Title
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  Data: Investigation on Mechanical Performance and Flame-Retardancy of Polymer Cement-Based Coatings with Ettringite Modified by Amphiphilic Group.
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  Data: <searchLink fieldCode="AR" term="%22Yin%2C+Fangzhou%22">Yin, Fangzhou</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Kai%22">Ma, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gan%2C+Xingyu%22">Gan, Xingyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Laibo%22">Li, Laibo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Haiming%22">Zhang, Haiming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zhmqlu@163.com</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Lingchao%22">Lu, Lingchao</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Apr2026, Vol. 18 Issue 7, p863. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Ettringite%22">Ettringite</searchLink><br /><searchLink fieldCode="DE" term="%22Amphiphiles%22">Amphiphiles</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+preparation%22">Surface preparation</searchLink><br /><searchLink fieldCode="DE" term="%22Cement+composites%22">Cement composites</searchLink><br /><searchLink fieldCode="DE" term="%22Fireproofing%22">Fireproofing</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum+hydroxide%22">Aluminum hydroxide</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Polymer cement-based coatings (PCC) have great potential in protecting underground structures, while their flame -retardancy is limited by the flammability of the polymer components. Developing multifunctional inorganic fillers that can enhance both mechanical properties and flame retardancy is crucial for improving the safety and durability of the coatings. In this study, an ettringite (AFt) modified by amphiphilic group and aluminum hydroxide (AH) was subjected to surface functionalization treatment and then incorporated into the PCC to enhance the overall performance of the material. The tensile strength and bond strength of the coatings modified by amphiphilic group with AFt were increased by 27.7% and 22.4%, respectively. Meanwhile, the flame burn time, flameless burn time, and carbonization length were reduced by 89.1%, 80.6%, and 90.2%, respectively, and the limiting oxygen index (LOI) increased by 28.9%. The amphiphilic groups act as molecular bridges that couple the inorganic modified AFt with the organic VAE phase, thereby strengthening the organic–inorganic interface and promoting a more integrated polymer–cement network. Meanwhile, the well-dispersed inorganic phases provide endothermic dehydration and a protective residue during heating, jointly improving the mechanical reliability and fire safety of the PCC. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.3390/polym18070863
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 863
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      – SubjectFull: Ettringite
        Type: general
      – SubjectFull: Amphiphiles
        Type: general
      – SubjectFull: Surface preparation
        Type: general
      – SubjectFull: Cement composites
        Type: general
      – SubjectFull: Fireproofing
        Type: general
      – SubjectFull: Aluminum hydroxide
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
    Titles:
      – TitleFull: Investigation on Mechanical Performance and Flame-Retardancy of Polymer Cement-Based Coatings with Ettringite Modified by Amphiphilic Group.
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            NameFull: Yin, Fangzhou
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            NameFull: Ma, Kai
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            NameFull: Li, Laibo
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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