Structure and properties of silk fibroin modified cotton |
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Authors: | H Lin L R Yao Y Y Chen H Wang |
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Institution: | (1) School of Material Engineering, Soochow University, Suzhou, 215021, Jiangsu, P. R. China |
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Abstract: | In this research, a novel cotton fiber with a silk fibroin (SF) coating was prepared by the oxidation of a cotton thread with
sodium periodate and subsequent treatment in a solution of silk fibroin. The structures of both the oxidized cotton samples
and the SF modified cotton samples were investigated by Fourier transform infrared (FT-IR) in combination with X-ray photoelectron
spectroscopy (XPS) analysis. Other performances such as surface morphology and breaking strength were also studied. The results
indicated that the weight of the oxidized cotton samples increased during SF treatment, while that of the un-oxidized cotton
(pure cotton) samples reduced after SF treatment. Compared with the pure cotton samples, the oxidized cotton clearly showed
a characteristic absorption band at 1730 cm−1 due to the stretching vibration of the C=O double bond of the aldehyde group. After being treated with the SF solution, the
oxidized cotton fiber showed a weakened characteristic absorption band at 1730 cm−1 and a new absorption band at round 1540 cm−1, suggesting the formation of C-N bond between aldehyde groups in the oxidized cotton and primary amines in the silk fibroin.
The results were also confirmed by XPS analysis. Compared with the oxidized cotton samples, the SF treated cottons had relatively
smooth surfaces, similar breaking strength, and the improved wrinkle recovery angles. The results in this research suggest
that cotton based materials with protein coating can be achieved without using any other crosslinking agents by the method
introduced. |
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Keywords: | Cotton Oxidation Sodium periodate Silk fibroin |
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