摘要
采用差示扫描量热法(DSC)研究高温氧化热处理对亚麻籽油热力学性质的影响。结果表明:未高温氧化热处理的亚麻籽油DSC曲线为1个结晶放热主峰,1个熔融放热峰和1个熔融吸热主峰及肩峰;高温氧化时间延长显著增加亚麻籽油的氧化程度,在DSC曲线上表现出结晶放热主峰和熔融放热峰逐渐消失,熔融吸热峰峰值温度向高温方向移动,热焓值下降。通过测定亚麻籽油的结晶和熔融曲线可以快速评价其氧化程度。
The effect of high-temperature oxidation treatment on the thermal properties of flaxseed oil was investigated by differential scanning calorimetry（DSC） method. The results showed that the DSC curve of the initial flaxseed oil included a crystallization exothermic peak,a melting exothermic peak and a melting endothermic peak and shoulder peaks. Prolonging high-temperature oxidation time significantly increased the degree of oxidation of flaxseed oil,the crystallization exothermic peak and melting exothermic peak gradually disappeared in the DSC curve,melting endothermic peak temperature moved to the direction of high temperature,and the heat enthalpy dropped. Measuring the crystallization and melting curve of flaxseed oil could quickly evaluate the degree of oxidation.
出处
《中国油脂》
CAS
CSCD
北大核心
2015年第4期33-37,共5页
China Oils and Fats
基金
国家科技支撑计划子课题项目(2013BAD20B06)
关键词
亚麻籽油
高温氧化热处理
结晶曲线
熔融曲线
flaxseed oil
high-temperature oxidation treatment
crystallization curve
melting curve
