Synthesis of Rosin Acid Starch Catalyzed by Lipase

Rosin, an abundant raw material from pine trees, was used as a starting material directly for the synthesis of rosin acid starch. The esterification reaction was catalyzed by lipase (Novozym 435) under mild conditions. Based on single factor experimentation, the optimal esterification conditions wer...

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Bibliographic Details
Published in:BioMed research international 2014-01, Vol.2014 (2014), p.1-8
Main Authors: Lin, Rihui, Li, He, Long, Han, Su, Jiating, Huang, Wenqin
Format: Article
Language:English
Subjects:
Acids
Cassava
Catalysis
Chemical industry
Enzyme Activation
Esterification
Fatty acids
Lipase
Lipase - chemistry
Manihot esculenta
Materials Testing
Properties
Renewable Energy
Resins, Plant - chemistry
Starch
Starch - chemical synthesis
Starch - isolation & purification
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Summary:Rosin, an abundant raw material from pine trees, was used as a starting material directly for the synthesis of rosin acid starch. The esterification reaction was catalyzed by lipase (Novozym 435) under mild conditions. Based on single factor experimentation, the optimal esterification conditions were obtained as follows: rosin acid/anhydrous glucose unit in the molar ratio 2 : 1, reaction time 4 h at 45°C, and 15% of lipase dosage. The degree of substitution (DS) reaches 0.098. Product from esterification of cassava starch with rosin acid was confirmed by FTIR spectroscopy and iodine coloration analysis. Scanning electron microscopy and X-ray diffraction analysis showed that the morphology and crystallinity of the cassava starch were largely destroyed. Thermogravimetric analysis indicated that thermal stability of rosin acid starch decreased compared with native starch.
ISSN:2314-6133
2314-6141
DOI:10.1155/2014/647068