摘要
考察魔芋葡甘聚糖(KGM)及其衍生物魔芋超强吸水剂(KSAP)的吸湿、保湿性能,并与甘油、丙二醇进行对比。测定KGM和KSAP的水分吸附等温线,采用回归分析建立数学模型。结果表明:KSAP的吸湿、保湿性能优于甘油和丙二醇。水分吸附等温线属于第Ⅲ型,在给定的水分含量下,KSAP的水分活度最低,保湿性能最好。Peleg模型拟合效果最好,BET模型和GAB模型拟合显示KSAP的单分子层水分含量最高,分别为14.59%和15.42%。
The properties of moisture absorption and retention in KGM and KSAP were compared with glycerin and propylene glycol, and their water adsorption isotherms were determined to illustrate the mechanism of moisture retention by using fitting regression analysis to evaluate the optimal mathematical model. It was found that the properties of moisture absorption and retention of KSAP were better than those of glycerin and propylene glycol. The shape of sorption isotherms were found to be type III. At a given moisture content, the water activity of KSAP was the lowest. Peleg equation was best for characterizing the sorption behavior of these four materials. The monolayer moisture content values of KSAP obtained by the BET equation and GAB equation were 14.59% and 15.42%, respectively, greater than those of glycerin and propylene glycol.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第3期46-50,共5页
Food Science
基金
国家烟草专卖局资助项目(110200701003)
