| Title |
Influence of dodecenylsuccinate content on properties of acetylated potato starch dodecenylsuccinate / |
| Authors |
Luneckas, Jonas ; Peciulyte, Laura ; Bendoraitiene, Joana ; Rutkaite, Ramune |
| DOI |
10.15388/IOR2023 |
| ISBN |
9786090708835 |
| Full Text |
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| Is Part of |
Open readings 2023: 66th international conference for students of physics and natural sciences, April 18-21, 2023, Vilnius, Lithuania: annual abstract book / editors: M. Keršys, Š. Mickus.. Vilnius : Vilnius University press, 2023. p. 134.. ISBN 9786090708835 |
| Abstract [eng] |
The demand for plastics in the world is growing every year, leading to an increased demand for resources required to produce those non-renewable plastics which are depleting at a rapid pace. To address this growing problem, the alternative polymers from renewable sources can be produced and starch is receiving increasing attention. Naturally found starch does not possess thermoplastic properties (has neither melting nor glass transition temperature) and it’s of hydrophilic nature. To overcome these disadvantages, the starch could be chemically modified in order to obtain thermally processable materials based on renewable resources. The aim of this study was to synthesize acetylated potato starch dodecenylsuccinates with varying degree of substitution and determine the influence of dodecenylsuccinate content in those derivatives on their thermal properties. Potato starch was modified with 2-dodecen-1-yl succinic anhydride and acetic anhydride in an alkaline medium. The starch was modified in two stages. In the first stage, starch dodecenylsuccinate was obtained at room temperature in an alkaline environment, maintaining the pH at 8-8.5 with a goal to get at least three starches with varying degree of substitution to use as a base for the second reaction. Then in the second stage starch dodecenylsuccinates were modified with acetic anhydride at 100-140 oC at different reaction duration. The degree of substitution of dodecenylsuccinate and acetate groups in obtained potato starch esters was determined according to the methodology given in the literature [1]. Moreover, Fourier-transform infrared spectroscopic analysis of the synthesized starch derivatives was performed. In order to assess the changes in the hydrophobicity, the water contact angle of the surface of the compressed acetylated starch dodecenylsuccinate tablets was evaluated. Differential scanning calorimetry analysis demonstrated that glass transition was characteristic of both acetylated starches and acetylated starch dodecenylsuccinates, and depended on the degree of substitution of both acetyl and dodecenylsuccinate groups. Granular structure did not change during modification of starch with dodecenyl succinic anhydride. But scanning electron microscopy shows that destruction of granules occurred during starch dodecenylsuccinate modification with acetic anhydride at higher degree of substitution. |
| Published |
Vilnius : Vilnius University press, 2023 |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2023 |
| CC license |
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