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Issue 13, 2018
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High-throughput roll-to-roll fabrication of flexible thermochromic coatings for smart windows with VO2 nanoparticles

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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

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Publication details

The article was received on 22 Dec 2017, accepted on 26 Feb 2018 and first published on 26 Feb 2018


Article type: Paper
DOI: 10.1039/C7TC05876D
Citation: J. Mater. Chem. C, 2018,6, 3451-3458
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    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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