期刊
FOOD HYDROCOLLOIDS
卷 20, 期 8, 页码 1198-1205出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2006.01.004
关键词
galactomannan; esterification; gums; structure
Acetate, succinate and octenylsuccinate derivatives of galactomannans were prepared in anhydrous reaction conditions carried out at slightly elevated temperature (40-60 degrees C) using solid NaHCO3 as a mild base catalyst. Prior surface wetting of the reactants with similar to 5% absolute ethyl alcohol gave derivatives with a higher degree of substitution, although it decreased the slurry viscosity. Use of NaHCO3 significantly minimized high pH-induced degradative reactions, and its quantitative removal later was easily accomplished by repeated washings with aqueous ethyl alcohol. FT-IR, C-13-NMR, HPSEC and SEM data provided additional structural information. These derivatives are useful as functional food ingredients. (c) 2006 Elsevier Ltd. All rights reserved.
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