Solar heat shielding performance of potassium titanate whisker coated polypropylene fabric based on a bionic method

Songmin Shang, Yuxiang Wang, Ka lok Chiu, Shouxiang Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Inspired by the special whisker-shaped hairs from the Saharan silver ants (SSant), we fabricated a bionic solar heat shielding fabric by coating prismatic potassium titanate whiskers (PTW) with the binder of polyurethane (PU) and polydimethylsiloxane (PDMS) on the polypropylene (PP) fabric. The test results show that the bionic PTW coated fabric can reflect nearly 90% of the solar irradiance, thus effectively reducing the received radiant power. The solar shielding ability of the fabricated fabric is positively correlated with the density of the coated PTW. Under the same conditions, the surface temperature covered by the as-prepared fabric, compared to the uncoated fabric, can be reduced by 21.3 °C. More so, the thermal conductivity, thermal transmittance, the solar heat gain coefficient (SHGC), water repellency and mechanical properties of the coated fabric are also significantly improved. In summary, the bionic PTW coated fabrics possess the similar thermal shielding functions as the silver ant microhairs. This study provides a strategy for bionic designing and development of solar heat shielding fabric.

Original languageEnglish
Article number107408
JournalComposites Part B: Engineering
Volume177
DOIs
Publication statusPublished - 15 Nov 2019

Keywords

  • Bionic fabric coating
  • Microhairs of Saharan silver ant
  • Potassium titanate whisker
  • Solar heat shielding fabric

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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