Preparation and properties of octadecylamine modified SiO2/silicon-acrylic coating for concrete anti-snowmelt salt corrosion

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED Progress in Organic Coatings Pub Date : 2025-02-17 DOI:10.1016/j.porgcoat.2025.109155

Lifang Song , Like Zhao , Huiyun Xia , Xu Li , Liying Cui , Yanhui Niu

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引用次数: 0

Abstract

In this study, silane coupling agent γ-glycidylethoxypropyltrimethoxysiane was employed as an intermediate bridge for grafting octadecylamine (ODA) onto the surface of SiO₂ to obtain hydrophobic modified functional nanoparticles (ODA-SiO₂). The structure of SiO₂ before and after modification was analyzed by FT-IR and XRD, and the successful preparation of ODA-SiO₂ was confirmed. Using γ-methacryloxypropyltrimethoxysilane (MPS) as the organic silicon modifying monomer, a semi-continuous seed emulsion polymerization method was employed to synthesize silicon-acrylic (KSA) emulsion. It was found that the emulsion with a MPS content of 4 % exhibited the best stability and film forming property. The functional composite coating (ODA-SiO₂/KSA) was obtained with different amount of ODA-SiO₂ and coated on the surface of different test boards. The resulting ODA-SiO₂/KSA coating was examined in terms of barrier property, thermal stability and UV aging resistance. It was discovered that the coating exhibited the optimal protective effect when the ODA-SiO₂ was 1.5 wt%. The coatings with this composition were applied to concrete and tested for chloride ion electric flux and chloride freeze-thaw cycles. The results demonstrated that the addition of ODA-SiO₂ enhanced the hydrophobic properties of the coating, improved the impermeability comparing with the pure resin coating, and effectively protected the concrete substrate in snowmelt salt freeze-thaw environments, thereby providing increased corrosion resistance.

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.