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

IF 7.3 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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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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十八胺改性SiO2/硅丙烯酸混凝土抗融雪盐腐蚀涂料的制备及性能研究

本研究以硅烷偶联剂γ-甘油基乙氧基丙基三甲氧基siane为中间桥接剂，将十八烷基胺（ODA）接枝到SiO2表面，得到疏水修饰的功能纳米粒子（ODA-SiO2）。通过FT-IR和XRD分析了改性前后SiO2的结构，证实了ODA-SiO2的成功制备。以γ-甲基丙烯氧基丙基三甲氧基硅烷（MPS）为有机硅改性单体，采用半连续种子乳液聚合法制备了硅丙烯酸乳液（KSA）。结果表明，当MPS含量为4%时，乳液的稳定性和成膜性能最好。采用不同的ODA-SiO2添加量制备了功能性复合涂层（ODA-SiO2/KSA），并将其涂覆在不同的测试板表面。对制备的ODA-SiO2/KSA涂层进行了阻隔性能、热稳定性和抗紫外线老化性能的测试。结果表明，当ODA-SiO2质量分数为1.5 wt%时，涂层的防护效果最佳。将该组合物涂料应用于混凝土中，并进行了氯离子电通量和氯离子冻融循环试验。结果表明：与纯树脂涂层相比，ODA-SiO2的加入增强了涂层的疏水性，提高了涂层的抗渗性能，在融雪盐冻融环境中对混凝土基材进行了有效保护，从而提高了抗腐蚀性能。

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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.