Vegetable Tannins as Chrome-Free Leather Tanning
The purpose of this study is to replace chrome tannins with ecofriendly vegetable tannins as an alternative solution to prevent the public health and the environmental pollution. Vegetable tannin was extracted from Cassia singueana bark using an aqueous extraction method and applied on sheep pickle...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2023-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2023/6220778 |
| _version_ | 1797665415443251200 |
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| author | Taame Berhanu Teklemedhin Tesfamariam Tekle Gebretsadik Tesfu Berhane Gebrehiwet Gebrehiwot Asfaha Gebrekidan Mahamedbirhan Edris Negasi Teklay Teklegiorgis Kokeb Brhane Hagos |
| author_facet | Taame Berhanu Teklemedhin Tesfamariam Tekle Gebretsadik Tesfu Berhane Gebrehiwet Gebrehiwot Asfaha Gebrekidan Mahamedbirhan Edris Negasi Teklay Teklegiorgis Kokeb Brhane Hagos |
| author_sort | Taame Berhanu Teklemedhin |
| collection | DOAJ |
| description | The purpose of this study is to replace chrome tannins with ecofriendly vegetable tannins as an alternative solution to prevent the public health and the environmental pollution. Vegetable tannin was extracted from Cassia singueana bark using an aqueous extraction method and applied on sheep pickle pelt. Optimum tannin extraction parameters were identified at powder concentration of 80 g/L, extraction temperature of 100°C, and extraction time of 120 mins. Chemical functionality of Cassia singueana extracted tannins was evaluated via FT-IR spectroscopy. Hence, the FT-IR spectrum confirmed the presence of wide band of phenolic hydroxyl (OH−) and carboxyl (C-O) groups connected with the aromatic ring. Moreover, physicochemical performance of the Cassia singueana extract tanned leather sample was scientifically examined and showed comparable results to conventional Mimosa tanned leather sample. The shrinkage temperature of Cassia singueana extract tanned leather recorded 83°C which is slightly higher than that of Mimosa extract (standard), 80°C. The results of mechanical properties such as tensile strength, tear strength, and elongation at break of Cassia singueana extract tanned leather sample are 15.6 N/mm2, 24.2 N/mm, and 45.3%, respectively, which are relatively higher than those of Mimosa extract tanned leather sample. A relatively higher reduction level of pollution load (BOD, COD, and TDS) was observed in the wastewater released from Cassia singueana bark extract compared to the Mimosa extract (standard). Finally, findings from this study revealed that Cassia singueana bark extract could be considered as an alternative source of vegetable tannins to reduce the consumption of chrome tanning in the leather tanning industry. |
| first_indexed | 2024-03-11T19:44:38Z |
| format | Article |
| id | doaj.art-864dee7bb9b742bba2f5653ccc1c6ac6 |
| institution | Directory Open Access Journal |
| issn | 1687-8442 |
| language | English |
| last_indexed | 2024-03-11T19:44:38Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj.art-864dee7bb9b742bba2f5653ccc1c6ac62023-10-06T00:00:01ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84422023-01-01202310.1155/2023/6220778Vegetable Tannins as Chrome-Free Leather TanningTaame Berhanu Teklemedhin0Tesfamariam Tekle Gebretsadik1Tesfu Berhane Gebrehiwet2Gebrehiwot Asfaha Gebrekidan3Mahamedbirhan Edris4Negasi Teklay Teklegiorgis5Kokeb Brhane Hagos6Department of Textile and Garment EngineeringDepartment of ChemistryDepartment of Textile and Garment EngineeringFDRE Technical and Vocational Training InstituteDepartment of Chemical EngineeringDepartment of Textile and Garment EngineeringDepartment of Textile and Garment EngineeringThe purpose of this study is to replace chrome tannins with ecofriendly vegetable tannins as an alternative solution to prevent the public health and the environmental pollution. Vegetable tannin was extracted from Cassia singueana bark using an aqueous extraction method and applied on sheep pickle pelt. Optimum tannin extraction parameters were identified at powder concentration of 80 g/L, extraction temperature of 100°C, and extraction time of 120 mins. Chemical functionality of Cassia singueana extracted tannins was evaluated via FT-IR spectroscopy. Hence, the FT-IR spectrum confirmed the presence of wide band of phenolic hydroxyl (OH−) and carboxyl (C-O) groups connected with the aromatic ring. Moreover, physicochemical performance of the Cassia singueana extract tanned leather sample was scientifically examined and showed comparable results to conventional Mimosa tanned leather sample. The shrinkage temperature of Cassia singueana extract tanned leather recorded 83°C which is slightly higher than that of Mimosa extract (standard), 80°C. The results of mechanical properties such as tensile strength, tear strength, and elongation at break of Cassia singueana extract tanned leather sample are 15.6 N/mm2, 24.2 N/mm, and 45.3%, respectively, which are relatively higher than those of Mimosa extract tanned leather sample. A relatively higher reduction level of pollution load (BOD, COD, and TDS) was observed in the wastewater released from Cassia singueana bark extract compared to the Mimosa extract (standard). Finally, findings from this study revealed that Cassia singueana bark extract could be considered as an alternative source of vegetable tannins to reduce the consumption of chrome tanning in the leather tanning industry.http://dx.doi.org/10.1155/2023/6220778 |
| spellingShingle | Taame Berhanu Teklemedhin Tesfamariam Tekle Gebretsadik Tesfu Berhane Gebrehiwet Gebrehiwot Asfaha Gebrekidan Mahamedbirhan Edris Negasi Teklay Teklegiorgis Kokeb Brhane Hagos Vegetable Tannins as Chrome-Free Leather Tanning Advances in Materials Science and Engineering |
| title | Vegetable Tannins as Chrome-Free Leather Tanning |
| title_full | Vegetable Tannins as Chrome-Free Leather Tanning |
| title_fullStr | Vegetable Tannins as Chrome-Free Leather Tanning |
| title_full_unstemmed | Vegetable Tannins as Chrome-Free Leather Tanning |
| title_short | Vegetable Tannins as Chrome-Free Leather Tanning |
| title_sort | vegetable tannins as chrome free leather tanning |
| url | http://dx.doi.org/10.1155/2023/6220778 |
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