干燥温度对SPI/CMC复合膜中硬脂酸结合形态的影响  

Effect of Drying Temperature on Stearic Acid State in SPI / CMC Composite Films

作　　者：张超[1] 郭晓飞[1] 李武[1] 马越[1] 赵晓燕[1] 

机构地区：[1]北京市农林科学院蔬菜研究中心/果蔬农产品保鲜与加工北京市重点实验室/农业部华北地区园艺作物生物学与种质创制重点实验室/农业部都市农业(北方)重点实验室,北京100097

出　　处：《中国粮油学报》2016年第4期124-127,共4页Journal of the Chinese Cereals and Oils Association

基　　金：北京市优秀人才(2010D002020000012)

摘　　要：研究干燥温度（30、60、90和120℃）对大豆分离蛋白／羧甲基纤维素／硬脂酸（SPI／CMC／SA）复合膜中硬脂酸分布和结合形态的影响。结果显示，硬脂酸以结合态和自由态2种形态存在于复合膜中，随着干燥温度提高，复合膜中结合态硬脂酸的比例提高。当干燥温度为90℃时，复合膜的红外光谱图不再显示硬脂酸的典型羰基基团吸收峰（1712cm-1）；复合膜的热失重图谱中不再显示硬脂酸的主要热降解现象（210～280℃）。因此在干燥温度为90℃时，硬脂酸与其他分子间紧密结合，分子间相互作用力提高。The effect of drying temperature （30, 60, 90, and 120 ℃） on the state and distribution of stearic acid within soybean protein- isolate/carboxymethyl cellulose/stearic acid （SPI/CMC/SA） composite films has been evaluated in the paper. The stearic acid presented as a free and bound state in the SPI/CMC/SA composite films, amoung which, the bound state of the stearci acid was increased in line with the raising drying temperature. At drying temperature 90 ℃, there was no absorption of 1 712 cm-1 occurred in the FTIR spectra of the composite film, which was the characteristic absorption of the stearic acid. Also there was no weight loss on condition of 210 ～ 280 ℃ in the thermalgravitic profile of the composite film, which was the main degradation of the stearic acid. At drying temoera-ture of 90 ℃, the molecular interaction could be intensified between the stearic acid and the other ingredients.

关 键 词：硬脂酸 结合态 大豆分离蛋白 红外光谱 干燥温度 

分 类 号：TS201.9[轻工技术与工程—食品科学]