接触角
水分
涂层
材料科学
透射率
超疏水涂料
耐久性
紫外线
甲基丙烯酸酯
复合材料
共聚物
聚合物
光电子学
作者
Wenbo He,Junfei Ou,Fajun Wang,Sheng Lei,Xinzuo Fang,Wen Li,Alidad Amirfazli
标识
DOI:10.1016/j.colsurfa.2023.130949
摘要
Paraloid B72, composed of an ethyl methacrylate (70%) and methyl acrylate (30%) copolymer, is widely used in the field of cultural relics protection due to its transparency, durability, and nonyellowing. However, B72 is hydrophilic and the water resistance should be enhanced. Herein, as a further study of the pioneer research by Ntelia et al. [1], transparent superhydrophobic coating was prepared and the durability as well as the protection against moisture will be studied. B72 was mixed with the hydrophobic nanoparticles of SiO2 in xylene and a transparent and superhydrophobic coating was then obtained by spraying onto the substrate of fabric, paper and wood. The fraction of SiO2 in the mixture was optimized to be 2 wt% by taking hydrophobicity, air permeability, transparency, and ultraviolet transmittance into consideration. The optimal coating presented a continuous porous network surface structure with the maximum contact angle of 165° and the minimum sliding angle of 6°. Average transmittance in visible and ultraviolet light range for the composite coating on glass was 72.57% and 19.46%, versus 82.81% and 32.26% for B72, respectively. BS2 coating permeability for different substrates are less than 10%. Contact angle remained above 150° after 4 h of contact with liquids with a pH of 1–13. Water contact angle on the simulated paper relics after exposure to a hot humid (60 °C, 85 – 90 RH%) atmosphere for 5 days remained above 150°. In addition, BS2 coating showed good UV resistance after 10 days of UV light irradiation. All these data demonstrated that such a coating may find potential application in the relic protection due to its superhydrophobicity, breathability, transparency, ultraviolet protection, and durability.
科研通智能强力驱动
Strongly Powered by AbleSci AI