Ionic liquids as novel solvents for biosynthesis of octenyl succinic anhydride-modified waxy maize starch

International Journal of Biological Macromolecules
Dandan LiYaoqi Tian

Abstract

Biosynthesis of octenyl succinic anhydride (OSA) starch was investigated using ionic liquids (ILs) as reaction media. Waxy maize starch was pretreated in 1-butyl-3-methylimidazolium chlorine and then esterified with OSA in 1-octyl-3-methylimidazolium nitrate by using Novozyme 435 as catalyst. The degree of substitution of OSA starch reached 0.0130 with 5 wt% starch concentration and 1 wt% lipase dosage based on ILs weight at 50 °C for 3h. The formation of OSA starch was confirmed by fourier transform infrared spectroscopy. Scanning electron microscopy and X-ray diffraction revealed that the morphology and crystal structure of starch were significantly destroyed. Thermogravimetric analysis showed that esterification decreased the thermal stability of starch. The successful lipase-catalyzed synthesis of OSA starch in ILs suggests that ILs are potential replacement of traditional organic solvents for starch ester biosynthesis.

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Citations

Oct 30, 2016·International Journal of Biological Macromolecules·Zaizhi LiuLei Yang
Oct 30, 2016·International Journal of Biological Macromolecules·Jong Min LeeIn-Soo Kong
Mar 24, 2018·International Journal of Biological Macromolecules·Vítor Geniselli da Silva, Ruann Janser Soares de Castro
Jun 3, 2021·Polymers·Ryan C AmosMario Gauthier

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