TEMPO-mediated oxidation of Flammulina velutipes mycelia for fabrication of transparent tension chitin membranes

DOI

10.2991/icmse-18.2018.112How to use a DOI?

Keywords

2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), Flammulina velutipes mycelia (FvM), nanofiber, transparent, tension membrane.

Abstract

Mushroom mycelia have been investigated as a new source of chitin for fabrication of nano materials. This work demonstrated the importance of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation in developing the functional qualities of chitin nanofibers using Flammulina velutipes mycelia (FvM) as the starting feedstock. Morphological characterization showed that the TEMPO treatment facilitated the formation of FvM membranes. The oxidation broke down the intact cellular structures. Homogeneous nanofibers were generated after the subsequent homogenization. The chemical analysis showed the ratio of N in FvM rather than O was increased by TEMPO oxidation. The carboxyl groups were not significantly introduced probably due to the degradation and dissolving of glucan, leaving chitin enriched in solids. TEMPO treatment also improved the thermal stability of FvM to a comparable level of Polyvinyl alcohol and Polyvinyl chloride. The membranes fabricated by crosslinking FvM nanofibers had excellent properties including high transparency, anti-UV activity and strong physical strength. The tensile index and elastic modulus were 2- and 2.5- folds of the reference polyethylene film. Our findings showed the TEMPO-oxidized FvM could be a promising material for fresh food packaging.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Han Zhang
AU  - Hao Liu
AU  - Xiaofang Wan
AU  - Jianhua Cheng
PY  - 2018/05
DA  - 2018/05
TI  - TEMPO-mediated oxidation of Flammulina velutipes mycelia for fabrication of transparent tension chitin membranes
BT  - Proceedings of the 2018 8th International Conference on Manufacturing Science and Engineering (ICMSE 2018)
PB  - Atlantis Press
SP  - 612
EP  - 617
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-18.2018.112
DO  - 10.2991/icmse-18.2018.112
ID  - Zhang2018/05
ER  -