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Issue 20, 2015
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A novel soft matter composite material for energy-saving smart windows: from preparation to device application

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Abstract

Nowadays, with the increasing energy consumption of buildings and the continuous improvement of human living standards, use of architectural glass with multi-functional features of large-scale manufacturing, safety and energy saving has become the mainstream trend. In this paper, a series of cholesteric side-chain liquid crystal polymers (ChSCLCPs) are designed and synthesized to composite with a widely used laminating material for safety glasses, ethylene-vinyl acetate (EVA), to endow the windows with IR light shielding property. The synthesized ChSCLCPs have the desired reflection wavelengths and thermal stability. Preparation methods of EVA/ChSCLCP composite materials are investigated and different ratios of the contents and various film treatment conditions are attempted. Interestingly, when the contents of EVA and ChSCLCP are equal, “sky-blue” areas are found under polarized optical microscopy (POM) and the film exhibits stronger light scattering and selective reflection properties. Taking advantages of this phenomenon, a new type of IR shielding film is manufactured by the powder blending method and it not only performs broadband reflection, but also exhibits a strong light scattering. Then, model buildings equipped with and without the film are set up and an energy conservation efficiency of up to 40.4% is obtained, which proves the film's practical applications in energy-saving smart windows.

Graphical abstract: A novel soft matter composite material for energy-saving smart windows: from preparation to device application

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Publication details

The article was received on 21 Nov 2014, accepted on 18 Mar 2015 and first published on 18 Mar 2015


Article type: Paper
DOI: 10.1039/C4TA06347C
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J. Mater. Chem. A, 2015,3, 10738-10746

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    A novel soft matter composite material for energy-saving smart windows: from preparation to device application

    Y. Gao, W. Yao, J. Sun, H. Zhang, Z. Wang, L. Wang, D. Yang, L. Zhang and H. Yang, J. Mater. Chem. A, 2015, 3, 10738
    DOI: 10.1039/C4TA06347C

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