Publication: Controlling the reversible thermochromism of polydiacetylene/zinc oxide nanocomposites by varying alkyl chain length
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Issued Date
2013-01-01
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ISSN
10957103
00219797
00219797
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2-s2.0-84867912395
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Colloid and Interface Science. Vol.389, No.1 (2013), 106-114
Suggested Citation
Amornsak Chanakul, Nisanart Traiphol, Rakchart Traiphol Controlling the reversible thermochromism of polydiacetylene/zinc oxide nanocomposites by varying alkyl chain length. Journal of Colloid and Interface Science. Vol.389, No.1 (2013), 106-114. doi:10.1016/j.jcis.2012.08.066 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/31495
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Title
Controlling the reversible thermochromism of polydiacetylene/zinc oxide nanocomposites by varying alkyl chain length
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Abstract
In this work, polydiacetylene (PDA)/ZnO nanocomposites are successfully fabricated by using three types of monomers with different alkyl chain length, 5,7-hexadecadiynoic acid, 10,12-tricosadiynoic acid, and 10,12-pentacosadiynoic acid. The monomers dispersed in aqueous medium spontaneously assemble onto the surface of ZnO nanoparticles, promoted by strong interfacial interactions. The PDA/ZnO nanocomposites obtained via photopolymerization process are characterized by scanning electron microscopy, laser light scattering, infrared spectroscopy, and uv/vis absorption spectroscopy. The strength of interfacial interactions and morphologies of the nanocomposites are found to vary with alkyl chain length of the monomers. The PDA/ZnO nanocomposites also exhibit rather different thermochromic behaviors compared to their pure PDA counterparts. All nanocomposites show reversible blue/purple color transition upon multiple heating/cooling cycles, while the irreversible blue/red color transition is observed in the systems of pure PDAs. The shortening of alkyl side chain in PDA/ZnO nanocomposites leads to a systematic decrease in their color-transition temperatures. Colors of the nanocomposites at elevated temperature also vary with the alkyl chain length. Our results provide a simple route for controlling the reversible thermochromism of PDA-based materials, allowing their utilization in a wider range of applications. © 2012 Elsevier Inc.