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Chelator-mediated biomimetic degradation of cellulose and chitin.

Abstract：

:Non-enzymatic degradation of wood via a chelator-mediated Fenton (CMF) system is the primary method for initial attack in brown rot fungal decomposition of wood, the most common type of fungal degradation of terrestrial carbon biomass on the planet. In this study, the degradation of thin films of cellulose and chitin by a CMF system was investigated and compared to enzymatic hydrolysis. The kinetics of the rapid cellulose and chitin deconstruction and the morphologies of the degraded cellulose and chitin surfaces were studied by quartz crystal microbalance with dissipation monitoring (QCM-D) and atomic force microscopy (AFM), respectively. The QCM-D results quantitatively indicated that ~90 wt% of the regenerated cellulose or chitin was capable of being deconstructed by CMF action alone. While enzymatic degradation was consistent with stripping of layers from the surface of the cellulose or chitin films, the CMF process exhibited a pronounced two stage process with a rapid initial depolymerization throughout the films. The initial degradation rates for both model surfaces by the CMF system were faster than enzyme action. This research suggests that the CMF process should be applicable for the deconstruction of a wide variety of polysaccharides over Fenton chemistry alone.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Liu J,Zhu Y,Wang C,Goodell B,Esker AR

doi

10.1016/j.ijbiomac.2020.02.262

subject

Has Abstract

pub_date

2020-06-15 00:00:00

pages

433-440

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(19)40231-6

journal_volume

153

pub_type

杂志文章

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