de Jonge, Fabian (2019) Synthesis of a biodegradable coating through direct transesterification of starch and sunflower oil. Bachelor's Thesis, Chemical Engineering.
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Abstract
A fatty acid starch ester was synthesized through direct transesterification of starch and sunflower oil. The resulting product was cross-linked in an attempt to form a biodegradable coating. The transesterification was carried out at 80°C and 115°C, using the catalysts NaOH/CTAB and TBD. The reaction products had a degree of substitution ranging from 4.60-13.5% of all alcohol groups. Products were analysed through 1H-NMR and IR spectroscopy. Analysis of the products clearly indicate formation of a fatty acid starch ester. The reaction products were used to produce a film, the product was dissolved and subsequently mixed with a crosslinking agent. As the solvent dried out a film was formed, the resulting films were analysed using IR spectroscopy. The resulting films clearly showed a decrease in double bonds, which indicates that crosslinking was successful. Overall a direct transesterification of sunflower oil and starch does yield a fatty acid starch ester, but the degree of substitution of the products were too low to have any real application as a coating.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Raffa, P. and Koning, C.E. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 15 Jul 2019 |
| Last Modified: | 07 Aug 2019 12:08 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/20230 |
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