Fabrication of optically transparent chitin nanocomposites |
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Authors: | M Iftekhar Shams Shinsuke Ifuku Masaya Nogi Takeshi Oku Hiroyuki Yano |
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Institution: | 1.Research Institute for Sustainable Humanosphere,Kyoto University,Kyoto,Japan;2.Department of Chemistry and Biotechnology, Graduate School of Engineering,Tottori University,Tottori,Japan;3.Institute of Science and Industrial Research,Osaka University,Osaka,Japan |
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Abstract: | This paper demonstrates the preparation of chitin nanofibers from crab shells using a simple mechanical treatment. The nanofibers
are small enough to retain the transparency of neat acrylic resin. Possessing hydroxyl and amine/N-acetyl functionalities, water suspension of chitin nanofibers was vacuum-filtered 9 times faster than cellulose nanofibers
to prepare a nanofiber sheet of 90 mm in diameter. This is a prominent advantage of chitin nanofibers over cellulose nanofibers
in terms of commercial application. Interestingly, chitin acrylic resin films exhibited much higher transparency than cellulose
acrylic resin films owing to the close affinity between less hydrophilic chitin and hydrophobic resin. Furthermore, the incorporation
of chitin nanofibers contributes to the significant improvement of the thermal expansion and mechanical properties of the
neat acrylic resin. The properties of high light transmittance and low thermal expansion make chitin nanocomposites promising
candidates for the substrate in a continuous roll-to-roll process in the manufacturing of various optoelectronic devices such
as flat panel displays, bendable displays, and solar cells. |
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