FT-IR表征天然油脂不饱和结构氧化深度与异构化的关系  

Relationship between Oxidation of Unsaturated Natural Oils and Isomerization Characterized by FT-IR

作　　者：周华龙[1,2] 邹永鹏[1,2] 程正伟 于华东[1,2] 熊江[1,2] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065 [3]深圳天之一科技开发有限公司,广东深圳518000

出　　处：《中国皮革》2013年第3期20-24,34,共6页China Leather

基　　金：四川省科技厅应用基础项目(2011JY0023)资助

摘　　要：经过大量的研究与分析,证明不饱和油脂的氧化生成是过氧化氢(—OOH)的一级氧化反应。进一步研究发现,不饱和油脂的氧化不是环氧化反应,更不是传统的氧化机理—氧化是在双键上发生的。通过红外光谱进行表征,常见的不饱和天然植物油脂、合成单酯在氧化过程中,随着氧化深度的加剧,其不饱和结构异构化加剧,即不饱和双键从顺势结构转变为反式结构;油脂的脂肪酸中含亚油酸、亚麻酸成分越多,异构化程度越明显,氧化速度越快。Plenty of researches and analysis prove that the oxidation of unsaturated oils is the generation of hydrogen peroxide （ --OOH ） --the level - one oxidation reaction. And further research shows that the oxidation of the unsaturated oils is neither the epoxidation reaction, nor the traditional oxidation mechanism. The oxidation is performed in double bonds. Characterized by Fou- rier Transform Infrared Spectroscopy（ FT- IR）, the unsaturated structural isomerization of common unsaturated natural plant oils and synthetic esters aggravates with oxidation depth increasing in the process of oxidation. And the unsaturated double bond struc- ture changes from homeopathy into trans -structure. The more linoleic acid and linolenic acid contained in the unsaturated oils, the more obvious the degree of isomerization turns and the faster the speed of oxidation is.

关 键 词：不饱和油脂 氧化 红外光谱 结构异构化 

分 类 号：TS51[轻工技术与工程—皮革化学与工程]