张巧智,丁俭,Tong Wang,江连洲,隋晓楠,李杨.基于热重法的植物油氧化动力学-甘油三酯相关性研究[J].农业机械学报,2016,47(8):241-247,254.
Zhang Qiaozhi,Ding Jian,Tong Wang,Jiang Lianzhou,Sui Xiaonan,Li Yang.Correlation between Vegetable Oil Oxidation Kinetics and Triacylglycerol Compositions Based on Thermogravimetry[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(8):241-247,254.
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基于热重法的植物油氧化动力学-甘油三酯相关性研究   [下载全文]
Correlation between Vegetable Oil Oxidation Kinetics and Triacylglycerol Compositions Based on Thermogravimetry   [Download Pdf][in English]
投稿时间:2016-01-02  
DOI:10.6041/j.issn.1000-1298.2016.08.031
中文关键词:  植物油  氧化动力学  热重分析  微商热重分析  相关性
基金项目:“十二五”国家科技支撑计划项目(2014BAD22B00)
作者单位
张巧智 东北农业大学 
丁俭 东北农业大学 
Tong Wang 爱荷华州立大学 
江连洲 东北农业大学 
隋晓楠 东北农业大学 
李杨 东北农业大学 
中文摘要:通过热重(TG)及微商热重(DTG)法研究了6种常见植物油的热氧化特性,分析了不同温控程序对质量变化曲线的影响,通过微商热重曲线确定了不同升温速率下的氧化起始温度(Ton)和氧化峰值温度(Tp),结合Ozawa-Flynn-Wall等转化率法对油脂的氧化动力学特性进行推导,并对油脂热氧化特性与其甘油三酯组成与分布的相关性进行了分析。研究结果表明:随着升温速率的增加,Ton和Tp均随之升高且Tp变化更为敏感;植物油的热力学特性与其甘三酯组成间具有不同程度的相关性,其中,Ton及Ton处活化能与高饱和度甘三酯呈正相关而与高不饱和度甘三酯呈负相关,Tp及Tp处活化能与各组分间具有相似的关系但相关性略有减弱,具体相关性与甘油骨架上脂肪酸链的种类有关。热重分析法所需样品微量、操作快捷、灵敏度高,在油脂加工及质量检测领域具有广阔的应用前景。
Zhang Qiaozhi  Ding Jian  Tong Wang  Jiang Lianzhou  Sui Xiaonan  Li Yang
Northeast Agricultural University,Northeast Agricultural University,Iowa State University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:vegetable oil  oxidation kinetics  thermogravimetry  derivative thermogravimetry  correlation
Abstract:Thermogravimetry (TG) and derivative thermogravimetry (DTG) were used to investigate the thermal oxidative properties of six normal vegetable oils. The influence of different heating programs on the weight changing curves was studied and the onset oxidation temperature (Ton) and peak oxidation temperature (Tp) were located from the DTG curves. Through the application of Ozawa-Flynn-Wall iso-conventional method, the oxidation kinetic properties of oils were deduced and the correlation between thermal behaviors and triacylglycerol composition was analyzed. The results showed that both Ton and Tp were increased with the raise of heating rate and Tp was varied more sensitively, which indicated that the reactions occurred around Tp could be more acuminous to the change in surroundings. Varying degrees of correlation were found between thermal behaviors and triacylglycerol distribution: Ton and Ea(Ton) were found to be positively correlated with high saturated triacylglycerols but negatively correlated with high unsaturated ones. Similar results were found between Tp, Ea(Tp) and various components but with weaker correlations. Specific correlation was depended on the type of fatty acid chains on glycerol skeletons. Thus, predictions of oil thermal stability could be done according to thetriacylglycerol profiles. Thermogravimetry analysis was praised for trace sample size, fast operation and high sensitivity, which would show promising prospect in oil processing and quality control.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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