INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE
The leather processing industry is known as an important source of environmental pollution, due to the large amount of waste generated. In this respect there are efforts concerning recovering and capitalizing of these wastes in order to subsequently use them in different applications. This work aime...
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| Format: | Article |
| Language: | English |
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Editura Universităţii din Oradea
2017-05-01
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| Series: | Annals of the University of Oradea: Fascicle of Textiles, Leatherwork |
| Subjects: | |
| Online Access: | http://textile.webhost.uoradea.ro/Annals/Vol%20XVIII-No%202-2017/Pielarie/Art.nr.%20270-pag.135-140.pdf |
| _version_ | 1811217062558695424 |
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| author | BĂLĂU MÎNDRU Tudorel BĂLĂU MÎNDRU Iulia PRUNEANU Melinda |
| author_facet | BĂLĂU MÎNDRU Tudorel BĂLĂU MÎNDRU Iulia PRUNEANU Melinda |
| author_sort | BĂLĂU MÎNDRU Tudorel |
| collection | DOAJ |
| description | The leather processing industry is known as an important source of environmental pollution, due to the large amount of waste generated. In this respect there are efforts concerning recovering and capitalizing of these wastes in order to subsequently use them in different applications. This work aimed to obtain collagen forms with convenient features starting from Chamois leather waste resulting from the buffing operation, by alkaline hydrolysis at different temperatures (60°C, 90°C, and 120°C) and reaction time (4, 6 and 8 hours), in a solution of 30% NH4OH with a pH=11. The effects of the reaction conditions (temperature and reaction duration) on the hydrolysis yield and molecular weight of the extracted polypeptides were investigated. The working version no. 8 (temperature = 1200C, and reaction time = 6h) was chosen as optimal for obtaining a protein product suitable from the point of view of hydrolysis yield and molecular weight, respectively. For this sample no. 8, tests for checking physical-chemical characteristics were carried out, and also the influence of the hydrolysis upon certain structural changes caused by the reaction conditions was investigated by IR analysis. The reaction conditions led to obtaining polypeptide mixtures with different molecular weights and polydispersity that can be used as auxiliaries to obtain composite materials or as additives for new building materials. |
| first_indexed | 2024-04-12T06:48:53Z |
| format | Article |
| id | doaj.art-298c06d4045b41e38f0bdff008a5ad78 |
| institution | Directory Open Access Journal |
| issn | 1843-813X 2457-4880 |
| language | English |
| last_indexed | 2024-04-12T06:48:53Z |
| publishDate | 2017-05-01 |
| publisher | Editura Universităţii din Oradea |
| record_format | Article |
| series | Annals of the University of Oradea: Fascicle of Textiles, Leatherwork |
| spelling | doaj.art-298c06d4045b41e38f0bdff008a5ad782022-12-22T03:43:26ZengEditura Universităţii din OradeaAnnals of the University of Oradea: Fascicle of Textiles, Leatherwork1843-813X2457-48802017-05-01XVIII2135140INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTEBĂLĂU MÎNDRU Tudorel0 BĂLĂU MÎNDRU Iulia1PRUNEANU Melinda2“Gheorghe Asachi” Technical University of Iaşi, Romania, the Department of Chemical Engineering in Textile – Leather, Faculty of Textile Leather and Industrial Management, 53 Dimitrie Mangeron Avenue, postal code 700500, Iaşi, Romania“Gheorghe Asachi” Technical University of Iaşi, Romania, the Department of Chemical Engineering in Textile – Leather, Faculty of Textile Leather and Industrial Management, 53 Dimitrie Mangeron Avenue, postal code 700500, Iaşi, Romania“Gheorghe Asachi” Technical University of Iaşi, Romania, the Department of Chemical Engineering in Textile – Leather, Faculty of Textile Leather and Industrial Management, 53 Dimitrie Mangeron Avenue, postal code 700500, Iaşi, RomaniaThe leather processing industry is known as an important source of environmental pollution, due to the large amount of waste generated. In this respect there are efforts concerning recovering and capitalizing of these wastes in order to subsequently use them in different applications. This work aimed to obtain collagen forms with convenient features starting from Chamois leather waste resulting from the buffing operation, by alkaline hydrolysis at different temperatures (60°C, 90°C, and 120°C) and reaction time (4, 6 and 8 hours), in a solution of 30% NH4OH with a pH=11. The effects of the reaction conditions (temperature and reaction duration) on the hydrolysis yield and molecular weight of the extracted polypeptides were investigated. The working version no. 8 (temperature = 1200C, and reaction time = 6h) was chosen as optimal for obtaining a protein product suitable from the point of view of hydrolysis yield and molecular weight, respectively. For this sample no. 8, tests for checking physical-chemical characteristics were carried out, and also the influence of the hydrolysis upon certain structural changes caused by the reaction conditions was investigated by IR analysis. The reaction conditions led to obtaining polypeptide mixtures with different molecular weights and polydispersity that can be used as auxiliaries to obtain composite materials or as additives for new building materials.http://textile.webhost.uoradea.ro/Annals/Vol%20XVIII-No%202-2017/Pielarie/Art.nr.%20270-pag.135-140.pdfhydrolysis yieldpolipeptide mixturesstructural characteristicsIR analyses |
| spellingShingle | BĂLĂU MÎNDRU Tudorel BĂLĂU MÎNDRU Iulia PRUNEANU Melinda INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE Annals of the University of Oradea: Fascicle of Textiles, Leatherwork hydrolysis yield polipeptide mixtures structural characteristics IR analyses |
| title | INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE |
| title_full | INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE |
| title_fullStr | INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE |
| title_full_unstemmed | INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE |
| title_short | INFLUENCE OF REACTION CONDITIONS ON THE ALKALINE HYDROLYSIS OF CHAMOIS LEATHER WASTE |
| title_sort | influence of reaction conditions on the alkaline hydrolysis of chamois leather waste |
| topic | hydrolysis yield polipeptide mixtures structural characteristics IR analyses |
| url | http://textile.webhost.uoradea.ro/Annals/Vol%20XVIII-No%202-2017/Pielarie/Art.nr.%20270-pag.135-140.pdf |
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