cp173(1)_519.pdf 758 KB
Dote Yuki Faculty of Engineering, Tottori University
Okuda Noriko Graduate School of Engineering, Tottori University
Sumita Masato Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
Morimoto Minoru Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University 研究者総覧 KAKEN
We previously developed bio-based wrinkled surfaces induced by wood-mimetic skins upon drying in which microscopic wrinkles were fabricated on a chitosan (CS) film by immersing it in a phenolic acid solution, followed by horseradish peroxidase (HRP)-catalyzed surface reaction and drying. However, the detailed structure of the resulting wood-mimetic skins, including crosslinking mode and thickness, has not been clarified due to the difficulty of the analysis. Here, we prepare wrinkled films using ferulic acid (FE), vanillic acid (VA), and homovanillic acid (HO) and characterize their structures to clarify the unknown characteristics of wood-mimetic skin. Chemical and structural analyses of wood-mimetic skins prepared using VA and HO indicate that the crosslinking structure in the skin is composed of ionic bonds between CS and an oligophenolic residue generated by the HRP-catalyzed reaction on the CS surface. Moreover, the quantity of these ionic bonds is related to the skin hardness and wrinkle size. Finally, SEM and TOF-SIMS analyses indicate that the skin thickness is on the submicron order (<200 nm).
Copyright © 2017 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
This research was published by Elsevier : Izawa H, Dote Y, Okuda N, Sumita M, Ifuku S, Morimoto M, Saimoto H. Wood-mimetic skins prepared using horseradish peroxidase catalysis to induce surface wrinkling of chitosan film upon drying. Carbohydrate Polymers. 2017, 173, 519-525. DOI: https://doi.org/10.1016/j.carbpol.2017.06.034