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Wood-mimetic skins prepared using horseradish peroxidase catalysis to induce surface wrinkling of chitosan film upon drying 50643235 Izawa, Hironori Izawa, Hironori Dote, Yuki Okuda, Noriko Sumita, Masato 70402980 Ifuku, Shinsuke Ifuku, Shinsuke 10273880 Morimoto, Minoru Morimoto, Minoru 20186977 Saimoto, Hiroyuki Saimoto, Hiroyuki Dote, Yuki Okuda, Noriko Sumita, Masato 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/ Chitosan Surface wrinkling Skin layer Horseradish peroxidase Phenolic acid Biomimetic materials Chitosan Surface wrinkling Skin layer Horseradish peroxidase Phenolic acid Biomimetic materials 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). Elsevier 2017-10-01 eng journal article AM https://repository.lib.tottori-u.ac.jp/records/7125 10.1016/j.carbpol.2017.06.034 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 Polymer https://www.sciencedirect.com/science/article/pii/S0144861717306719 https://www.sciencedirect.com/science/article/pii/S0144861717306719 AA11522761 01448617 Carbohydrate polymers Carbohydrate polymers 173 1 519 525 https://repository.lib.tottori-u.ac.jp/record/7125/files/cp173(1)_519.pdf application/pdf 796.4 kB 2023-03-17