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Structure and properties of the graft copolymer of starch and p ‐hydroxybenzoic acid using horseradish peroxidase
Author(s) -
Lv Shenghua,
Gong Rui,
Ma Yanfen
Publication year - 2012
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.2052
Subject(s) - copolymer , horseradish peroxidase , starch , fourier transform infrared spectroscopy , gel permeation chromatography , materials science , polymer chemistry , nuclear chemistry , polymerization , chemistry , chemical engineering , polymer , organic chemistry , composite material , engineering , enzyme
A modified starch tannage was synthesized by free radical graft copolymerization of degraded starch with p ‐hydroxybenzoic acid ( p HA) using horseradish peroxidase/H 2 O 2 as the initiator. In this study, the effects of the degree of degradation of the starch, dosage of p HA, polymerization temperature, system pH, and horseradish peroxidase content on the tanning properties of the graft copolymer were investigated. The shrinkage temperature of leather tanned by the graft copolymer was 78 °C. The thickness increment ratio of the retanned leather was 21.6%, and meanwhile the retanned leather showed better softness. The results indicate that the graft copolymer has excellent tanning and retanning properties. The structure of the graft copolymer was analyzed by Fourier Transform Infrared Spectroscopy (FTIR), 1 Hydrogen‐Nuclear Magnetic Resonance ( 1 H‐NMR), and 13 Carbon‐Nuclear Magnetic Resonance ( 13 C‐NMR) and Gel Permeation Chromatography (GPC). Compared with conventional methods, we show that a “green” leather tannage could be achieved using a radical graft copolymerization of starch and phenols. Copyright © 2011 John Wiley & Sons, Ltd.