碩士 / 國立臺灣科技大學 / 化學工程系 / 99 / Cyanophycin is a non-ribosomal protein. The constituents consist of aspartic acid, arginine and lysine. Cyanophycin includes amino group which allows chemical modification to improves the shortcomings of cyanophycin. In this study, polyethylene glycol was used to modify cyanophycin.
The hydroxyl functional group at the end of PEG was first modified to aldehyde group. The modified PEG then reacted with cyanophycin. Different molar ratios of cyanophycin and PEG were employed to investigate the effect of PEGylation on cyanophycin.
The physical properties of PEGylated cyanophycin were characterized by TLC, NMR, FTIR, TGA, DSC and XRD. The results showed that the crystallinity, thermal stability and melting point increased as the degree of PEGylation increased in comparision to unmodified cyanophycin.
The PEGylated cyanophycin could serve as a new biomaterial in the future.
| Identifer | oai:union.ndltd.org:TW/099NTUS5342024 |
| Date | January 2011 |
| Creators | Cheng-yu Chi, 紀承宇 |
| Contributors | Wen-Chi Tseng, 曾文祺 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 82 |
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