Studies on the Dry-method Hydrophobic Modification and Mechanism of Micronized Starch

Abstract

Abstract: grades of micronized starch (MST) were prepared by the modern advanced powder equipment respectively. Thecoupling agent DL was used to react with micronized starch by dry-method in order to improve the hydrophobic property ofMST. And the modified condition and its mechanism were researched. The results showed that the best condition of dry-methodhydrophobic modification on MST were 112℃ and 20min. Along with the size of MST granules decreasing, the specific surfacearea and the hydroxyl groups on the surface of MST increased., which offered more hydroxyl groups to react with DL. In thisway the dry-method hydrophobic modification degree of MST was improved.

Key words: micronized starch, dry-method, hydrophobic, modify

WU Jun, LI Bin, XIE Bi-Jun. Studies on the Dry-method Hydrophobic Modification and Mechanism of Micronized Starch[J]. FOOD SCIENCE, 2004, 25(9): 96-100.

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Studies on the Dry-method Hydrophobic Modification and Mechanism of Micronized Starch

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