FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (6): 52-55.doi: 10.7506/spkx1002-6630-201306011

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Synthesis of Laurate Starch Using Immobilized Lipase

XIN Jia-ying1, 2，LIU Tie1，WANG Yan1，CHEN Lin-lin1   

  1. 1. Key Laboratory for Food Science and Engineering, Harbin University of Commerce, Harbin 150076, China；2. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2012-04-10 Revised:2013-01-30 Online:2013-03-25 Published:2013-03-01
  • Contact: tie liu E-mail:lyclear@qq.com

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Abstract: Laurate starch was synthesized by immobilized lipase Novozym 435 as the biocatalyst in the solvent-free system. The effects of water activity, reaction temperature, reaction time and lipase-substrate ratio on esterification of laurate starch were explored. The results showed that the optimal reaction conditions included reaction time of 24 h, reaction temperature of 60 ℃, lauric acid-starch ratio of 4:1 and lipase-starch ratio of 3:100. Under the optimal reaction conditions, the degree of substitution was 0.1339. The structure of the product was confirmed by FT-IR.

Key words: laurate starch, solvent-free system, Novozym 435

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