Facile fabrication of superhydrophobic paper with durability, chemical stability and self-cleaning by roll coating with
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ORIGINAL ARTICLE
Facile fabrication of superhydrophobic paper with durability, chemical stability and self‑cleaning by roll coating with modified nano‑TiO2 Yuhong Teng1 · Yufeng Wang1,2 · Baoying Shi3 · Weiwei Fan1 · Ziyan Li1 · Yunzhi Chen1 Received: 8 May 2020 / Accepted: 17 July 2020 © King Abdulaziz City for Science and Technology 2020
Abstract A superhydrophobic paper with excellent robustness was fabricated by roll coating with modified nano-TiO2. First, nano-TiO2 particles were hydrophobically modified by γ-aminopropyltriethoxysilane and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (POTS). Then the paper coating composed of modified nano-TiO2 particles as pigments and epoxy resin (EP) as adhesives was coated on a paper surface to create the desired surface morphology and surface energy. Compared with the uncoated filter paper, the prepared paper showed an improved rough surface morphology owing to the uniform layer of T iO2 microclusters deposited on the fiber network. The superhydrophobic paper exhibited water contact angles (WCA) about 153° ± 1.5°, and water sliding angles (WSA) about 3.5° ± 0.5°, low surface adhesion and excellent bounce ability. The superhydrophobic paper can withstand a variety of wear and tear, such as tape stripping and knife scraping. The as-prepared superhydrophobic paper showed mechanical durability even after 20 wear cycles with sandpaper,thus sustaining excellent superhydrophobicity on the filter paper surface. Moreover, it remains fully functional even in environments with high concentrations of acid and alkali for 96 h. The superhydrophobicity was not affected after storage for 6 months in a natural environment. It was confirmed that the superhydrophobic paper surface exhibited excellent chemical stability, long-term stability and self-cleaning properties. The entire production process was operated under normal environment, without complex equipment; and, as such, has the possibility for large-scale production and application in industry. Keywords TiO2 nanoparticles · Superhydrophobicity · Paper substrate · Durability · Coating
Introduction The wetting property is a significant characteristic of solid surfaces and has an important impact on solving problems related to the health, environment, energy, transportation and biomedicine (Wen et al. 2017). When the water droplets are Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13204-020-01518-4) contains supplementary material, which is available to authorized users. * Yufeng Wang [email protected] * Yunzhi Chen [email protected] 1
Tianjin University of Science and Technology, Tianjin 300222, China
2
State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
3
Tianjin Tianshi College, Tianjin 301700, China
on the solid surface, a contact angle can be measured at the edge of the water droplets, which is used to characterize the wettability of the water droplets (Celia et al. 2013). When the water contact angle (W
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