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Crosslinking of silk fibroin by aqueous peroxydisulfate
Author(s) -
Needles H. L.
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070110509
Subject(s) - fibroin , peroxydisulfate , antheraea pernyi , chemistry , aqueous solution , polymer chemistry , materials science , silk , organic chemistry , biochemistry , composite material , gene
Silk fibroin is crosslinked by 0.1–1.0 M ammonium peroxydisulfate at 70°C. or at 40°C. in the presence of silver ion. Induced decomposition of peroxydisulfate in the presence of fibroin is observed. Methylation of tyrosine in fibroin does not slow attack by peroxydisulfate, but crosslinking of the fibroin is prevented. Modification of tryptophan with α‐bromo‐5‐nitro‐2‐cresol does not prevent crosslinking by peroxydisulfate, however. The nature and sites of crosslinking in fibroin are suggested in light of physical and chemical data, amino acid analyses of crosslinked and control fibroins, and the known mode of decomposition of peroxydisulfate.