Clarity of Films from Wool Keratin
The keratin in wool is a highly crosslinked protein. The high molecular weight, crosslinked structure prevents its shaping into films without extensive decomposition. Since the crosslinks are —S—S— bridges, reducing agents can break them up. resulting temporarily in lower molecular weight polymers....
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| Veröffentlicht in: | Textile research journal 1999-07, Vol.69 (7), p.539-541 |
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| container_title | Textile research journal |
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| creator | Pavlath, Attila E. Houssard, Catherine Camirand, Wayne Robertson, George H. |
| description | The keratin in wool is a highly crosslinked protein. The high molecular weight, crosslinked structure prevents its shaping into films without extensive decomposition. Since the crosslinks are —S—S— bridges, reducing agents can break them up. resulting temporarily in lower molecular weight polymers. In this work, wool fibers are pretreated with an aqueous solution of various reducing agents to open the disulfide bonds, and then pressed into films at 130-150°C and pressures of 41.7-66.7 MPa in a hydraulic press. The optimum conditions to obtain clear, transparent films include using Na2SO3 in aqueous alcohol solutions before pressing 135°C and 55.6 MPa. |
| doi_str_mv | 10.1177/004051759906900712 |
| format | Article |
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The high molecular weight, crosslinked structure prevents its shaping into films without extensive decomposition. Since the crosslinks are —S—S— bridges, reducing agents can break them up. resulting temporarily in lower molecular weight polymers. In this work, wool fibers are pretreated with an aqueous solution of various reducing agents to open the disulfide bonds, and then pressed into films at 130-150°C and pressures of 41.7-66.7 MPa in a hydraulic press. 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The high molecular weight, crosslinked structure prevents its shaping into films without extensive decomposition. Since the crosslinks are —S—S— bridges, reducing agents can break them up. resulting temporarily in lower molecular weight polymers. In this work, wool fibers are pretreated with an aqueous solution of various reducing agents to open the disulfide bonds, and then pressed into films at 130-150°C and pressures of 41.7-66.7 MPa in a hydraulic press. 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| fulltext | fulltext |
| identifier | ISSN: 0040-5175 |
| ispartof | Textile research journal, 1999-07, Vol.69 (7), p.539-541 |
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| language | eng |
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| source | SAGE Complete A-Z List |
| subjects | Bridges (structures) Crosslinking Keratins Molecular structure Molecular weight Reducing agents Textiles Wool |
| title | Clarity of Films from Wool Keratin |
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