Issue 13, 2018

High-throughput roll-to-roll fabrication of flexible thermochromic coatings for smart windows with VO2 nanoparticles

Abstract

VO2-based ‘nanothermochromics’ that utilize the dispersion of VO2 nanoparticles in a passive host matrix have been evaluated as an economic strategy of “smart” windows to reduce energy consumption for heating and air conditioning in buildings. Here, we demonstrate a high-throughput roll-to-roll fabrication of thermochromic coatings for smart windows that can adapt their optical properties in accordance with external temperature. A large quantity (250 g) of VO2 nanoparticles (NPs) was synthesized at one time by controlled thermal treatment of bead-milled V2O5 NPs as a fast and inexpensive method. The amorphous nature of bead-milled V2O5 NPs combined with their nanometer size kinetically facilitates uniform synthesis of high-quality VO2 NPs even under less-reducing conditions than those used to obtain bulk VO2. This mass production of VO2 NPs could be used to fabricate the largest thermochromic coatings with VO2/PVP composites (12 cm × 600 cm) yet produced with excellent infrared modulation ability (∼45%). This scalable and continuous production of large coatings with thermochromic NPs will accelerate the commercialization of thermochromic coatings for smart windows, which will contribute to a large reduction in energy consumption to heat or cool buildings.

Graphical abstract: High-throughput roll-to-roll fabrication of flexible thermochromic coatings for smart windows with VO2 nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
22 dez 2017
Accepted
26 fev 2018
First published
26 fev 2018

J. Mater. Chem. C, 2018,6, 3451-3458

High-throughput roll-to-roll fabrication of flexible thermochromic coatings for smart windows with VO2 nanoparticles

Y. Kim, S. Yu, J. Park, D. Yoon, A. M. Dayaghi, K. J. Kim, J. S. Ahn and J. Son, J. Mater. Chem. C, 2018, 6, 3451 DOI: 10.1039/C7TC05876D

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