Influence of alkenyl succinic anhydride structure on surface properties of gelatin derivative surfactants
| Autor: | Ewe-chuan Tan, 陳友泉 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 In this study, surface active gelatin derivative surfactants were formed by covalent attachment of hydrophobic groups of polyisobutenyl succinic anhydride to gelatin molecules by alkali hydrolysis. The structure of the final products was confirmed by IR and NMR. The surface activity was evaluated by surface tension, contact angle, emulsifying power and foaming properties. It was evaluated by surface tension, contact angle, emulsifying power and foaming properties. It was found that the modified gelatins are more surface active than the unmodified gelatin. The increase in hydrophobic chain length and the number of attached alkyl chains per gelatin molecule leads to an increase in the surface activity. The modified gelatin derivative surfactants also have high foaming ability and high emulsifying ability, while the maximal surface activity is obtained by the 320PBMA modified gelatin. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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