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Journal |
Textile Coloration and Finishing |
Year / Vol., Issue, Month |
2020 / V.32,no.4,Dec |
Title |
Utilization of Food Waste Extract as an Eco-friendly Biocatalyst
for Indigo Reduction |
Authors |
Kunghee Son, Dong Il Yoo1 and Younsook Shin* |
Institution/Affiliations |
Chonnam National University |
Pages/Total page |
pp.193 ~ 198 / 6 |
Language |
Korean |
Abstract |
In this study, the validity of extracts from food waste as biocatalyst for
indigo reduction was examined. Dried food wastes such as apple peel and corn waste
were water-extracted and freeze-dried. The reducing power of extracts for indigo was
evaluated by the oxidation-reduction potential(ORP) measurement of reduction bath and
color strength(K/S value) of the fabrics dyed in the indigo reduction bath. Total sugar
contents of the apple peel and corn waste extracts were 60.56% and 62.36%,
respectively. Antioxidant activity was 64.78% for the extract of apple peel and 7.96%
for the extract of corn waste. Indigo reduction took place quickly with both extracts,
and maximum color strength was obtained up to 15.91 and 12.11 within 1-3 days,
respectively. The oxidation-reduction potential of reduction bath was stabilized in the
range of –500 ~ -620 mV according to the kinds of food waste and the extract
concentration. At higher concentration of the extracts, reduction power was maintained
for longer time and stronger color strength was obtained. Compared to sodium
dithionite, the reducing power of the studied extracts was lower, but the reduction
stability was superior to it. The studied extracts were effective biocatalyst as
biodegradable and safe alternatives to sodium dithionite for indigo reduction. |
Keywords |
food wastes extracts, indigo reduction, biocatalyst, oxidation-reduction
potential, color strength |
Download |
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Reference |
http://koreascience.or.kr/journal/OSGGBT.page?&lang=ko |
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