Synthesis of Rosin Acid Starch Catalyzed by Lipase | Zendy

Rihui Lin | Zendy; He Li | Zendy; Han Long | Zendy; Jiating Su | Zendy; Wenqin Huang | Zendy

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Synthesis of Rosin Acid Starch Catalyzed by Lipase

Author(s) -

Rihui Lin,

He Li,

Han Long,

Jiating Su,

Wenqin Huang

Publication year - 2014

Publication title -

biomed research international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.772

H-Index - 126

eISSN - 2314-6141

pISSN - 2314-6133

DOI - 10.1155/2014/647068

Subject(s) - rosin , starch , thermogravimetric analysis , crystallinity , lipase , chemistry , anhydrous , catalysis , thermal stability , organic chemistry , nuclear chemistry , raw material , fourier transform infrared spectroscopy , resin acid , chemical engineering , enzyme , engineering , crystallography

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.

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