An efficient ultrasonic-assisted bleaching strategy customized for yak hair triggered by melanin-targeted Fenton reaction

Li, Qing; Wei, Zengfeng; Li, Mohan; Li, Shiwei; Ni, Lijie; Quan, Heng; Zhou, Yuyang

doi:10.1016/j.ultsonch.2022.106020

Cited by 4 publications

(1 citation statement)

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“…These studies, which successfully utilized lignin decomposition products as a biomass resource, motivated us to decompose melanin, another cross-linkable biopolymer. There is some understanding of melanin degradation under the alkaline and oxidizing conditions used to remove melanin from hair, known as bleaching, and in the analyses of melanin compositions in vivo. − However, these studies have focused on the highly efficient degradation of melanin, and additional progress must be made in analyzing the melanin decomposition products and upcycling them.…”

Section: Introductionmentioning

confidence: 99%

Melanin Upcycling: Creation of Polymeric Materials from Melanin Decomposition Products

Morita,

Matsuura,

Izawa

et al. 2024

ACS Sustainable Chem. Eng.

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Melanin is a widely occurring biopolymer and has been the subject of much research, especially in dermatology. However, from a resource perspective, melanin is still an unutilized biomass because of its complex three-dimensional cross-linked structure, which makes it challenging to handle. Here, we demonstrate melanin upcycling by decomposing melanin and preparing polymeric materials from its products. A detailed study of the chemical decomposition products of artificial melanin, i.e., polydopamine, reveals that the melanin decomposition products are mainly oligomeric pyrrole derivatives containing carboxylic acids. Furthermore, decomposition experiments using natural melanin extracted from cuttlefish ink revealed that the composition of melanin decomposition products is almost identical regardless of the melanin source. We proposed a melanin decomposition mechanism and demonstrated the preparation of biobased polymer films and particles from melanin decomposition products. The use of melanin decomposition products as building blocks for material preparation is expected to lead to the development of new biodegradable polymers from biomass.

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Section: Introductionmentioning

confidence: 99%