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Ultraviolet light-initiated preparation of phase change material microcapsules and its infrared imaging effect on fabric

Mingqi Gu (College of Textile and Garments, Hebei University of Science and Technology, Tianjin, China and Hebei Technology Innovation Center for Textile and Garment, Hebei University of Science and Technology, Tianjin, China)
Wei Zhang (College of Textile and Garments, Hebei University of Science and Technology, Tianjin, China and Hebei Technology Innovation Center for Textile and Garment, Hebei University of Science and Technology, Tianjin, China)
Shang Hao (Hebei University of Science and Technology, Tianjin, China and Hebei Technology Innovation Center for Textile and Garment, Hebei University of Science and Technology, Tianjin, China)
Xiaochen Liu (College of Textile and Garments, Hebei University of Science and Technology, Tianjin, China)
Zichao Zhang (College of Textile and Garments, Hebei University of Science and Technology, Tianjin, China and Hebei Technology Innovation Center for Textile and Garment, Hebei University of Science and Technology, Tianjin, China)
Fenjuan Shao (Key Lab of News Publishing Science and Technology and Standardization, Shanghai Publishing and Printing College, Shanghai, China)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 11 August 2020

Issue publication date: 11 March 2021

186

Abstract

Purpose

This study aims to explore the infrared imaging effect of fabrics coated with phase change material microcapsules (PCM-MCs), which are prepared by the initiation of ultraviolet (UV) light.

Design/methodology/approach

PCM-MCs were prepared by UV polymerization using paraffin (PA) as core material, polymethyl methacrylate as wall material and ferric chloride as photoinitiator. The effects of emulsifier dosage and emulsification temperature on the properties of PA emulsion were investigated. Scanning electron microscopy, particle size analysis, infrared spectroscopy, differential scanning calorimetry and infrared imaging test were used to characterize the properties of microcapsules.

Findings

The PCM-MCs with good morphology and particle size were prepared with 25 cm of the distance between light source and the liquid. The average particle size was 1.066 µm and the latent heat of phase transition was 19.96 J/g. After 100 accelerated thermal cycles, the latent heat only decreased by 1.8%. It had good heat storage stability and thermal stability. The fabric coated by the microcapsules exhibited a variable temperature hysteresis effect when placed in the sun, and presented a color close to the infrared images of the human palm under the external environment temperature close to the human body temperature.

Research limitations/implications

The PCM-MCs prepared based on UV light initiation showed good thermal properties and its coated fabrics had an infrared decoy effect below the temperature of the human body.

Practical implications

This study explored the application of microcapsules in textiles.

Originality/value

The microcapsules had a certain application potential in infrared decoy effect.

Keywords

Citation

Gu, M., Zhang, W., Hao, S., Liu, X., Zhang, Z. and Shao, F. (2021), "Ultraviolet light-initiated preparation of phase change material microcapsules and its infrared imaging effect on fabric", Pigment & Resin Technology, Vol. 50 No. 2, pp. 129-135. https://doi.org/10.1108/PRT-02-2020-0011

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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