Skip to main content

Research Repository

Advanced Search

Fabrication of highly hydrophobic two-component thermosetting polyurethane surfaces with silica nanoparticles

Yang, Guang; Song, Jialu; Hou, Xianghui

Fabrication of highly hydrophobic two-component thermosetting polyurethane surfaces with silica nanoparticles Thumbnail


Authors

Guang Yang

Jialu Song

Xianghui Hou



Abstract

© 2018 Elsevier B.V. Highly hydrophobic thermosetting polyurethane (TSU) surfaces with micro-nano hierarchical structures were developed by a simple process combined with sandpaper templates and nano-silica embellishment. Sandpapers with grit sizes varying from 240 to 7000 grit were used to obtain micro-scale roughness on an intrinsic hydrophilic TSU surface. The surface wettability was investigated by contact angle measurement. It was found that the largest contact angle of the TSU surface without nanoparticles at 102 ± 3° was obtained when the template was 240-grit sandpaper and the molding progress started after 45 min curing of TSU. Silica nanoparticles modified with polydimethylsiloxane were scattered onto the surfaces of both the polymer and the template to construct the desirable nanostructures. The influences of the morphology, surface composition and the silica content on the TSU surface wettability were studied by scanning electron microscopy (SEM), attenuated total reflection (ATR) infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and contact angle measurements. The surface of the TSU/SiO 2 nanocomposites containing 4 wt% silica nanoparticles exhibited a distinctive dual-scale structure and excellent hydrophobicity with the contact angle above 150°. The mechanism of wettability was also discussed by Wenzel model and Cassie-Baxter model.

Journal Article Type Article
Acceptance Date Jan 8, 2018
Online Publication Date Jan 9, 2018
Publication Date May 1, 2018
Deposit Date Jan 9, 2018
Publicly Available Date Jan 10, 2019
Journal Applied Surface Science
Print ISSN 0169-4332
Electronic ISSN 1873-5584
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 439
Pages 772-779
DOI https://doi.org/10.1016/j.apsusc.2018.01.017
Keywords Thermosetting polyurethane; Hydrophobicity; Sandpaper template; Silica nanoparticles; Hierarchical structure
Public URL https://nottingham-repository.worktribe.com/output/903658
Publisher URL https://www.sciencedirect.com/science/article/pii/S0169433218300199
Additional Information This article is maintained by: Elsevier; Article Title: Fabrication of highly hydrophobic two-component thermosetting polyurethane surfaces with silica nanoparticles; Journal Title: Applied Surface Science; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.apsusc.2018.01.017; Content Type: article; Copyright: © 2018 Elsevier B.V. All rights reserved.

Files





Downloadable Citations