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研究论文

混凝土表面TiO2-ATP复合涂层防淡水壳菜侵蚀研究

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  • 1.武汉理工大学交通与物流工程学院   2.武汉理工大学水路交通控制全国重点实验室
白秀琴(1971-),博士,教授,研究方向:船舶摩擦学、防污防腐技术等,E-mail:xqbai@whut.edu.cn

收稿日期: 2024-02-27

  修回日期: 2025-03-13

  录用日期: 2025-03-15

  网络出版日期: 2025-06-10

基金资助

湖北省自然科学基金创新发展联合基金重点项目(2022CFD029);2023 年湖北省重大攻关项目(JD)(2023BAA003)

Study on the Resistance of TiO2-Attapulgite Composite Coating on Concrete Surface to Freshwater Mussel Erosion

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  • (a.School of Transportation and Logistics Engineering, b.State Key Laboratory of Maritime Technology and Safety,Wuhan University of Technology, Wuhan 430063, China)
BAI Xiuqin (1971-), Ph.D., Professor, Research Focus: Ship Tribology, Antifouling and Anti-Corrosion Technology, etc., E-mail: xqbai@whut.edu.cn

Received date: 2024-02-27

  Revised date: 2025-03-13

  Accepted date: 2025-03-15

  Online published: 2025-06-10

Supported by

Innovation and Development Joint Fund Key Project of Hubei Provincial Natural Science Foundation (2022CFD029); Major Program (JD) of Hubei Province (2023BAA003)

摘要

淡水壳菜是淡水里常见的大型污损生物,它们易附着在水利构筑物混凝土表面破坏混凝土结构,采用涂层防护是一种防止淡水壳菜侵蚀的有效方法。 利用羟基封端聚二甲基硅氧烷(H-PDMS)改性环氧树脂,添加二氧化钛(TiO2)纳米颗粒和凹凸棒土(ATP)微米颗粒,采用空气喷涂法制备TiO2-ATP 复合涂层。 进行30 d 淡水壳菜侵蚀试验,通过环境扫描电子显微镜、热重分析、高性能全自动压汞仪、电子万能试验机等多种测试手段,探讨了TiO2-ATP 复合涂层的防护效果。 研究结果显示:TiO2-ATP 复合涂层表面接触角达到138.7° ± 1.6°,复合涂层防护的混凝土试样在水中浸泡24 h 和48 h 的吸水率分别为0.08%和0.13%。 30 d 侵蚀试验后,TiO2-ATP 复合涂层防护的混凝土试样在热重测试后质量损失了3.71%,孔隙率为10.21%,抗压强度比无涂层防护时的抗压强度提高了22.76%,表明TiO2-ATP 复合涂层有效延缓了混凝土内部钙含量的浸出,阻止了淡水壳菜足丝对混凝土内部的侵蚀,延缓了水的渗入,显著提高了混凝土结构的耐久性。

本文引用格式

袁先富, 杨宗澄, 贺小燕, 刘雨晗, 白秀琴 . 混凝土表面TiO2-ATP复合涂层防淡水壳菜侵蚀研究[J]. 材料保护, 2025 , 58(5) : 153 -160 . DOI: 10.16577/j.issn.1001-1560.2025.0087

Abstract

Freshwater mussels are common large fouling organisms in freshwater.They easily attach to the concrete surfaces of water-conservancy structures and damage the concrete.Coating protection is an effective method to prevent erosion by freshwater mussels.In this study,a TiO2-ATP composite coating was fabricated by air spraying after modifying epoxy resin with hydroxyl-terminated polydimethylsiloxane (H-PDMS)and loading it with titanium-dioxide (TiO2) nanoparticles and attapulgite (ATP) microparticles.A 30 d freshwater mussel erosion test was conducted,and the protective performance of the coating was evaluated by environmental scanning electron microscopy,thermogravimetric analysis, high-performance automatic mercury porosimetry and an electronic universal testing machine.Results showed that the surface contact angle of the TiO2-ATP composite coating reached 138.7°±1.6°.The water-absorption ratios of concrete specimens protected by the coating were recorded as 0.08%and 0.13%after 24 h and 48 h immersion, respectively.After 30 d of erosion, the coated specimens suffered a mass loss of 3.71%, exhibited a porosity of 10.21%, and displayed a compressive strength 22.76%higher than that of uncoated specimens.These findings demonstrated that the TiO2-ATP composite coating effectively delayed calcium leaching from concrete, prevented erosion by freshwater mussel byssus, reduced water penetration, and markedly enhanced the durability of the concrete structure.
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