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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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/2/244 |
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| author | Zixuan Yu Xiaofeng Zhang Rong Zhang Yan Yu Fengbo Sun |
| author_facet | Zixuan Yu Xiaofeng Zhang Rong Zhang Yan Yu Fengbo Sun |
| author_sort | Zixuan Yu |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T00:40:31Z |
| format | Article |
| id | doaj.art-9c4091d2d56e410f91bb63d082cce2b0 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T00:40:31Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-9c4091d2d56e410f91bb63d082cce2b02023-11-23T15:08:21ZengMDPI AGPolymers2073-43602022-01-0114224410.3390/polym14020244Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic HydrolysisZixuan Yu0Xiaofeng Zhang1Rong Zhang2Yan Yu3Fengbo Sun4Department of Biomaterials, International Center for Bamboo and Rattan, Beijing 100102, ChinaDepartment of Biomaterials, International Center for Bamboo and Rattan, Beijing 100102, ChinaDepartment of Biomaterials, International Center for Bamboo and Rattan, Beijing 100102, ChinaCollege of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaDepartment of Biomaterials, International Center for Bamboo and Rattan, Beijing 100102, ChinaBamboo 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.https://www.mdpi.com/2073-4360/14/2/244acidic treatmentbamboocolourmould-resistantstarch |
| spellingShingle | Zixuan Yu Xiaofeng Zhang Rong Zhang Yan Yu Fengbo Sun Improving the Mould and Blue-Stain-Resistance of Bamboo through Acidic Hydrolysis Polymers acidic treatment bamboo colour mould-resistant starch |
| 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 | acidic treatment bamboo colour mould-resistant starch |
| url | https://www.mdpi.com/2073-4360/14/2/244 |
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