庄良雨,李娟,刘维仪,张延宗.新型耐久超疏水墙面涂层的制备与性能评价[J].表面技术,2021,50(3):239-246.
ZHUANG Liang-yu,LI Juan,LIU Wei-yi,ZHANG Yan-zong.Preparation and Performance Evaluation of New Durable Superhydrophobic Wall Coatings[J].Surface Technology,2021,50(3):239-246 |
| 新型耐久超疏水墙面涂层的制备与性能评价 |
| Preparation and Performance Evaluation of New Durable Superhydrophobic Wall Coatings |
| 投稿时间：2020-03-01 修订日期：2020-05-08 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.03.024 |
| 中文关键词: 硅藻土 纳米SiO2 氟硅树脂 自清洁 超疏水 耐候性 |
| 英文关键词:diatomite SiO2 nanoparticles fluorosilicone resin self-cleaning superhydrophobicity weather resistance |
| 基金项目:四川省科学技术厅资助项目(2018JY0457，2019YFS0502) |
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| Author | Institution |
| ZHUANG Liang-yu | College of Environment, Sichuan Agricultural University, Chengdu 611130, China |
| LI Juan | College of Environment, Sichuan Agricultural University, Chengdu 611130, China |
| LIU Wei-yi | College of Environment, Sichuan Agricultural University, Chengdu 611130, China |
| ZHANG Yan-zong | College of Environment, Sichuan Agricultural University, Chengdu 611130, China |
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| 中文摘要: |
| 目的 从改善建筑墙体环境的角度出发，制备既能实现墙面自清洁，又具备耐久性的超疏水涂层。方法 将溶胶凝胶法制备得到的改性SiO2/硅藻土复合溶胶溶液与氟硅树脂乳液混合，喷涂在墙面上，得到了一种新型耐久的超疏水墙面涂层。利用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱仪(XPS)和接触角测量仪对涂层的微观形貌、化学结构和浸润性进行了观察分析，研究了硅藻土浓度对涂层超疏水性能以及机械强度的影响，并测试了涂层的耐酸碱能力、耐候性和自清洁能力。结果 硅藻土的最佳质量分数为7%，所制备的涂层拥有最佳性能，此时涂层的水接触角为160.74°±2°，滚动角为0.8°±1°。经11次胶带剥离后，涂层保持154.43°的接触角和4.8°的滚动角;经15次胶带剥离后，水滴仍可在其表面滚落，机械稳定性良好，超疏水性能优异。对于pH值为2~13的液体，涂层可保持150°以上的水接触角。在24个温度交替周期内，涂层水接触角保持在160°左右。在30 h的紫外辐射后，涂层水接触角下降至148.51°。涂层具有抵御颗粒污染物粘附以及有色溶液浸染的能力，能够保持墙面干净，具有良好的自清洁能力。结论 涂层的超疏水性能优异，具有耐久性和耐候性，能够有效地实现墙面的自清洁。 |
| 英文摘要: |
| The work aims to prepare superhydrophobic wall coatings with the ability of self-cleaning and durability from the perspective of improving the environment of building walls. In this paper, the modified SiO2/diatomite composite solution prepared by sol-gel method was mixed with fluorosilicone resin emulsion and sprayed on the wall. In this way, a new superhydrophobic wall coating was obtained after drying. Surface morphology, chemical structure and wettability of superhydrophobic surface were observed and analyzed by scanning electron microscopy (SEM), Flourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and contact angle tester. The effect of diatomite concentration on the superhydrophobic property and mechanical strength of the coating was studied and the acid-base resistance，weather resistance and self-cleaning ability of the coating were tested. The experimental results show that the water contact angle of the superhydrophobic coating reached 160.74°±2° and the rolling angle reached 0.8°±1° when the optimum mass fraction of diatomite was 7%. The contact angle of 154.43° and the rolling angle of 4.8° were maintained after the coating was peeled with tape for 11 times. The water droplets could still roll on the coating surface after being peeled with tape for 15 times with good mechanical stability and superhydrophobic performance. For liquids with a pH of 2~13, the coating remained a water contact angle of more than 150°. During the 24 temperature cycles, the water contact angle of the coating was maintained at about 160°. After 30 h of UV radiation, the water contact angle of the coating was decreased to 148.51°. The ability of the coating to resist the adhesion of particulate contaminants and the impregnation of colored solutions were demonstrated. The coating shows excellent superhydrophobic performance with durability and weatherability, which can effectively realize the self-cleaning of the wall. |
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