Effects of alumina hollow microspheres on the properties of water-borne polyurethane films

Wenjie Zhu, Yuan Cui, Chongjing Li, Zhuo Ma, Xinliang Li, Meikang Han, Laifei Cheng, Xiaowei Yin

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Water-based polyurethane/alumina hollow microsphere (WPU-hAl2O3) composite films were prepared via a facile spin coating method. The pristine WPU, as the matrix of the composite films, was tailor-made by hAl2O3 with the diameter of 2-5 μm to improve the mechanical and physical properties of the films. The hardness, surface morphology, infrared emissivity, wettability, and light transmittance of the WPU-hAl2O3 films with different hAl2O3 contents were investigated. The results indicate that the Vickers hardness, coefficient of friction, infrared emissivity at the wavelength of 2-22 μm, and wetting angle of the WPU-hAl2O3 films (30 wt%) increased by 53.6%, 51.7%, 21.1%, and 19.0%, respectively, compared with the pristine WPU films. Meanwhile, with the rising of hAl2O3 content, the light transmittance decreased by 75.3% at the wavelength of 400-800 nm. This work not only designs a kind of lightweight multifunctional composite film but also provides an effective route for extending further applications of hAl2O3 in the field of composite films.

Original languageEnglish
Pages (from-to)2486-2493
Number of pages8
JournalJournal of Materials Research
Volume33
Issue number17
DOIs
StatePublished - 14 Sep 2018

Keywords

  • ceramic
  • coating
  • film

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