固定化脂肪酶催化合成松香淀粉酯的研究

doi:10.3969/j.issn.0253-2417.2015.02.016

Abstract

Abstract: The synthesis of rosin starch ester catalyzed by lipase was carried out by using the materials of rosin and cassava starch. The effects of various factors on the degree of substitution (D_S) of rosin cassava starch ester were analyzed by single-factor experiment and response surface methodology. The optimum synthesis conditions were as follows: rosin-starch ratio 3.6:1 (w/w), reaction time 4.2 h, reaction temperature 48.5 ℃ and lipase- cassava starch amount 15%(starch mass). Under these conditions, the D_S reached 0.106. The product was characterized by FT-IR, XRD and SEM. The results showed that a CO stretching vibration absorption peak at 1729 cm^-1 was observed. This indicated that the rosin cassava starch ester was formed. Furthermore, the crystal morphology and structure of rosin cassava starch ester were changed. And the properties of rosin cassava starch ester were investigated. Compared with the pretreated starch, the emulsion capacity and emulsion stability of rosin cassava starch ester were increased by 122.26% and 134.16%, while surface tension and transparency were reduced by 46.9% and 5.22%, respectively.

Key words: esterification, cassava starch, rosin, immobilized lipase, response surface methodology

CLC Number:

TQ351
TS231

LI He, LIN Ri-hui, HUANG Wen-qin, LONG Han, LIU Zuo-jiao, SU Jia-ting. Catalytic Synthesis of Rosin Starch Ester by Immobilized Lipase[J]. Chemistry and Industry of Forest Products, 2015, 35(2): 103-110.

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Catalytic Synthesis of Rosin Starch Ester by Immobilized Lipase

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