孔祥清,张宁,申宜丹,张瑞祥,常雅慧,丁小轩.耐久性超疏水混凝土涂层的制备及其防腐性能研究[J].表面技术,2025,54(10):116-127.
KONG Xiangqing,ZHANG Ning,SHEN Yidan,ZHANG Ruixiang,CHANG Yahui,DING Xiaoxuan.Preparation of Durable Superhydrophobic Concrete Coating and Its Anti-corrosive Property[J].Surface Technology,2025,54(10):116-127 |
| 耐久性超疏水混凝土涂层的制备及其防腐性能研究 |
| Preparation of Durable Superhydrophobic Concrete Coating and Its Anti-corrosive Property |
| 投稿时间：2024-08-18 修订日期：2024-12-18 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.10.009 |
| 中文关键词: 一步法 喷涂 超疏水 混凝土 防腐蚀性 机械耐久性 |
| 英文关键词:one-step method spray superhydrophobic concrete corrosion resistance mechanical durability |
| 基金项目:广东省基础与应用基础研究基金区域联合基金(2022A1515140003);中国石油大学(华东)自主创新科研计划(24CX03014A) |
| 作者 | 单位 |
| 孔祥清 | 辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001;中国石油大学华东 储运与建筑工程学院，山东 青岛 266580 |
| 张宁 | 辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001 |
| 申宜丹 | 辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001 |
| 张瑞祥 | 松山湖材料实验室，广东 东莞 523830 |
| 常雅慧 | 辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001 |
| 丁小轩 | 中国石油大学华东 储运与建筑工程学院，山东 青岛 266580 |
|
| Author | Institution |
| KONG Xiangqing | School of Civil Engineering, Liaoning University of Technology, Liaoning Jinzhou 121001, China;College of Pipeline and Civil Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China |
| ZHANG Ning | School of Civil Engineering, Liaoning University of Technology, Liaoning Jinzhou 121001, China |
| SHEN Yidan | School of Civil Engineering, Liaoning University of Technology, Liaoning Jinzhou 121001, China |
| ZHANG Ruixiang | Songshan Lake Material Laboratory, Guangdong Dongguan 523830, China |
| CHANG Yahui | School of Civil Engineering, Liaoning University of Technology, Liaoning Jinzhou 121001, China |
| DING Xiaoxuan | College of Pipeline and Civil Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China |
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| 中文摘要: |
| 目的 开发工艺简单且具备优异防腐性和耐久性的超疏水混凝土涂层。方法 利用单宁酸(TA)和纳米二氧化硅(SiO2)共同构建混凝土材料表面的微/纳米粗糙结构，同时引入非氟的正辛基三乙氧基硅烷(OTES)作为低表面能物质以赋予颗粒表面疏水基团，采用一步喷涂法制备得到TA/SiO2@OTES超疏水混凝土涂层。通过研究不同浓度TA/SiO2对混凝土涂层的微观形貌以及润湿性的影响，确定了最佳掺入浓度。利用X射线衍射仪(XRD)和傅里叶红外光谱仪(FT-IR)等检测手段对混凝土材料表面的物质成分和化学键合进行了表征，并开展了吸水量、氯离子侵蚀、表面摩擦和水滴冲击等试验研究，综合评估了超疏水混凝土涂层的耐腐蚀性和机械耐久性。结果 当TA/SiO2质量浓度为4 mg/mL时，涂层所形成的微观形貌最佳，其接触角高达(156.8±1.6)°，滑动角低至(5.8±1.1)°;相较于普通混凝土，其抗氯离子侵蚀能力提高了60%以上。此外，经过50次砂纸线性摩擦以及50 min水滴冲击测试后，混凝土涂层仍具有超疏水性(接触角>150.0°，滑动角<10.0°)。结论 所制备的超疏水混凝土涂层展现出卓越的防腐蚀性以及机械耐久性，为超疏水材料在混凝土结构防护领域的应用提供了重要的参考依据。 |
| 英文摘要: |
| Concrete is widely used in the field of civil engineering because of its excellent mechanical properties and low price. However, concrete is inherently porous and hydrophilic, and is susceptible to corrosion by corrosive ions in seawater when exposed to moisture or marine environments for a long time. These corrosive ions will not only erode the surface of the concrete, but also corrode the internal steel bars. Therefore, in marine structural engineering, it is very important to improve the corrosion resistance of concrete by inhibiting the entry of external corrosive ions into concrete. In recent years, inspired by the lotus leaf effect, superhydrophobic materials have attracted widespread attention and become a research hotspot in the field of building materials due to their excellent hydrophobicity, corrosion resistance, and self-cleaning properties. Applying superhydrophobic materials to concrete structures can effectively prevent direct contact between concrete and corrosive ions in seawater, thereby preventing corrosion of internal steel bars. However, there is still a challenge in large-scale preparation of stable superhydrophobic anti-corrosion coatings. The work aims to propose a superhydrophobic concrete coating with simple process and excellent corrosion resistance and durability. The tannic acid (TA) was used as the binding substance and the superhydrophobic surface roughness structure with high-strength nano-SiO2 particles was co-constructed, while the non-fluorine low surface energy substance n-octyltriethoxysilane (OTES) was introduced for hydrophobic modification to obtain the superhydrophobic solution. Then, TA/SiO2@OTES superhydrophobic coating was successfully prepared by spraying the mixture on the surface of concrete with a one-step method. By studying the effects of different concentrations of TA/SiO2 on the microstructure and wettability of concrete coatings, the optimal doping concentration was determined. In addition, X-ray diffractometer (XRD) and Fourier infrared spectrometer (FT-IR) were used to characterize the material composition and chemical bonding on the surface of the concrete material, and experimental studies were carried out on water absorption, chloride ion erosion, surface friction and water droplet impact to comprehensively evaluate the corrosion resistance and mechanical durability of the superhydrophobic concrete coating. The results of the study showed that when the concentration of TA/SiO2 was 4 mg/mL, the coating formed the best microscopic morphology, with a contact angle as high as (156.8±1.6)° and a low sliding angle as low as (5.8±1.1)°. In the water absorption test, after soaking for 15 days, the water absorption of ordinary concrete was about 2.15 mm, while that of TA/SiO2@OTES superhydrophobic concrete was 0.42 mm, which was reduced by 80.5% compared with that of ordinary concrete, showing good impermeability and durability; In the corrosion resistance test, when ordinary concrete and TA/SiO2@OTES superhydrophobic concrete were immersed in 7wt.% NaCl solution for 28 days respectively, the depth of erosion of TA/SiO2@OTES superhydrophobic concrete was only one-fourth of that of the ordinary concrete at the same location on the cutting surface. Moreover, the quantitative analysis test also showed that the resistance of the concrete with coating to chloride ion erosion increased by more than 60%. In the mechanical durability test, TA/SiO2@OTES superhydrophobic concrete coating still had superhydrophobic properties (contact angle was greater than 150.0° and slide angle was less than 10.0°) after 50 times of sandpaper linear friction test and 50 minutes of water drop impact test, respectively. The above tests indicate that the prepared TA/SiO2@OTES superhydrophobic concrete coating has excellent corrosion resistance and mechanical strength, effectively protecting concrete components from corrosive ions and maintaining their superhydrophobic performance even under various physical attacks during long-term use. Furthermore, the one-step spraying method proposed in this study for preparing superhydrophobic concrete coatings is simple and produces no harmful substances, solving the problems of complex coating process and insufficient environmental protection. It is suitable for large-scale production and has broad application prospects in civil engineering structures. |
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