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Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis

Bamboo is much more easily attacked by fungus compared with wood, resulting in shorter service life and higher loss in storage and transportation. It has been long accepted that the high content of starch and sugars in bamboo is mainly responsible for its low mould resistance. In this paper, acetic...

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Autores principales: Yu, Zixuan, Zhang, Xiaofeng, Zhang, Rong, Yu, Yan, Sun, Fengbo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8778222/
https://www.ncbi.nlm.nih.gov/pubmed/35054649
http://dx.doi.org/10.3390/polym14020244
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author Yu, Zixuan
Zhang, Xiaofeng
Zhang, Rong
Yu, Yan
Sun, Fengbo
author_facet Yu, Zixuan
Zhang, Xiaofeng
Zhang, Rong
Yu, Yan
Sun, Fengbo
author_sort Yu, Zixuan
collection PubMed
description Bamboo is much more easily attacked by fungus compared with wood, resulting in shorter service life and higher loss in storage and transportation. It has been long accepted that the high content of starch and sugars in bamboo is mainly responsible for its low mould resistance. In this paper, acetic acid, propionic acid, oxalic acid, citric acid, and hydrochloric acid were adopted to hydrothermally hydrolyze the starch in bamboo, with the aims to investigate their respective effect on the mould and blue-stain resistance of bamboo, and the optimized citric acid in different concentrations were studied. The starch content, glucose yields, weight loss, and colour changes of solid bamboo caused by the different acidic hydrolysis were also compared. The results indicated that weak acidic hydrolysis treatment was capable of improving mould-resistant of bamboo. The mould resistance increased with the increased concentration of citric acid. Bamboo treated with citric acid in the concentration of 10% could reduce the infected area ranging to 10–17%, the growth rating of which could reach 1 resistance. The content of soluble sugar and starch remained in bamboo decreased significantly from 43 mg/g to 31 mg/g and 46 mg/g to 23 mg/g, respectively, when the citric acid concentration varied from 4% to 10%. Citric acid treatments of 10% also caused a greatest surface colour change and weight loss. The results in this study demonstrated citric acid treatment can effectively reduce the starch grain and soluble sugars content and improve mould resistance of bamboo, which can be attributed to the reduction of starch grain and soluble carbohydrates (such as glucose, fructose, and sucrose, etc.) in bamboo.
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spelling pubmed-87782222022-01-22 Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis Yu, Zixuan Zhang, Xiaofeng Zhang, Rong Yu, Yan Sun, Fengbo Polymers (Basel) Article Bamboo is much more easily attacked by fungus compared with wood, resulting in shorter service life and higher loss in storage and transportation. It has been long accepted that the high content of starch and sugars in bamboo is mainly responsible for its low mould resistance. In this paper, acetic acid, propionic acid, oxalic acid, citric acid, and hydrochloric acid were adopted to hydrothermally hydrolyze the starch in bamboo, with the aims to investigate their respective effect on the mould and blue-stain resistance of bamboo, and the optimized citric acid in different concentrations were studied. The starch content, glucose yields, weight loss, and colour changes of solid bamboo caused by the different acidic hydrolysis were also compared. The results indicated that weak acidic hydrolysis treatment was capable of improving mould-resistant of bamboo. The mould resistance increased with the increased concentration of citric acid. Bamboo treated with citric acid in the concentration of 10% could reduce the infected area ranging to 10–17%, the growth rating of which could reach 1 resistance. The content of soluble sugar and starch remained in bamboo decreased significantly from 43 mg/g to 31 mg/g and 46 mg/g to 23 mg/g, respectively, when the citric acid concentration varied from 4% to 10%. Citric acid treatments of 10% also caused a greatest surface colour change and weight loss. The results in this study demonstrated citric acid treatment can effectively reduce the starch grain and soluble sugars content and improve mould resistance of bamboo, which can be attributed to the reduction of starch grain and soluble carbohydrates (such as glucose, fructose, and sucrose, etc.) in bamboo. MDPI 2022-01-07 /pmc/articles/PMC8778222/ /pubmed/35054649 http://dx.doi.org/10.3390/polym14020244 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yu, Zixuan
Zhang, Xiaofeng
Zhang, Rong
Yu, Yan
Sun, Fengbo
Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title_full Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title_fullStr Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title_full_unstemmed Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title_short Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis
title_sort improving the mould and blue-stain-resistance of bamboo through acidic hydrolysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8778222/
https://www.ncbi.nlm.nih.gov/pubmed/35054649
http://dx.doi.org/10.3390/polym14020244
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