{"title":"Preparation of a self-cleaning TiO2-SiO2/PFDTS coating with superamphiphobicity and photocatalytic performance","authors":"","doi":"10.1016/j.porgcoat.2024.108767","DOIUrl":null,"url":null,"abstract":"<div><p>Coatings with superamphiphobicity and photocatalytic degradation properties to achieve excellent self-cleaning performance have received extensive attention. Herein, TiO<sub>2</sub>-SiO<sub>2</sub> composite particles with micro-/nanoscale hierarchical structures were fabricated by hydrophobic agglomeration. The TiO<sub>2</sub>-SiO<sub>2</sub> was modified with 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTS), and then it was sprayed onto the surfaces of substrates to obtain TiO<sub>2</sub>-SiO<sub>2</sub>/PFDTS coatings. The coating surface exhibited superamphiphobicity and low adhesion properties. The contact angles (CAs) of water, ethylene glycol, glycerol, and hexadecane on the coating surface were 163.5°, 154.6°, 157.3°, and 150.2°, respectively. The slide angles (SAs) of the above droplets on the coating surface were 0.4°, 2.7°, 1.6°, and 11.1°, respectively. In addition, 80.9 % methyl orange solution (10 ppm) was degraded by the TiO<sub>2</sub>-SiO<sub>2</sub>/PFDTS under UV irradiation in 60 min, demonstrating an excellent photocatalytic degradation performance. It also had good adaptability to different substrates, liquids with different properties, and outdoor environments. The results of a mechanistic study showed that SiO<sub>2</sub> and TiO<sub>2</sub> were connected by the carbon chains of modifiers. PFDTS and TiO<sub>2</sub>-SiO<sub>2</sub> might be combined by chemical bonds or surface carbon chains. The hierarchical structure of TiO<sub>2</sub>-SiO<sub>2</sub> and the low surface energy of PFDTS resulted in the superamphiphobic property of the TiO<sub>2</sub>-SiO<sub>2</sub>/PFDTS coating.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Organic Coatings","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0300944024005599","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Coatings with superamphiphobicity and photocatalytic degradation properties to achieve excellent self-cleaning performance have received extensive attention. Herein, TiO2-SiO2 composite particles with micro-/nanoscale hierarchical structures were fabricated by hydrophobic agglomeration. The TiO2-SiO2 was modified with 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTS), and then it was sprayed onto the surfaces of substrates to obtain TiO2-SiO2/PFDTS coatings. The coating surface exhibited superamphiphobicity and low adhesion properties. The contact angles (CAs) of water, ethylene glycol, glycerol, and hexadecane on the coating surface were 163.5°, 154.6°, 157.3°, and 150.2°, respectively. The slide angles (SAs) of the above droplets on the coating surface were 0.4°, 2.7°, 1.6°, and 11.1°, respectively. In addition, 80.9 % methyl orange solution (10 ppm) was degraded by the TiO2-SiO2/PFDTS under UV irradiation in 60 min, demonstrating an excellent photocatalytic degradation performance. It also had good adaptability to different substrates, liquids with different properties, and outdoor environments. The results of a mechanistic study showed that SiO2 and TiO2 were connected by the carbon chains of modifiers. PFDTS and TiO2-SiO2 might be combined by chemical bonds or surface carbon chains. The hierarchical structure of TiO2-SiO2 and the low surface energy of PFDTS resulted in the superamphiphobic property of the TiO2-SiO2/PFDTS coating.
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.