软脂酸结构及热稳定性研究  

Structure and thermal stability of palmitic acid

作　　者：董妍 杨若冰 李吉纳 郭雪纯 杜林楠 Dong Yan;Yang Ruobing;Li Jina;Guo Xuechun;Du Linnan(School of Chemical Engineering,Shijiazhuang University,Shijiazhuang 050035,China)

机构地区：[1]石家庄学院化工学院,河北石家庄050035

出　　处：《煤炭与化工》2020年第8期145-148,153,共5页Coal and Chemical Industry

基　　金：石家庄学院2020年大学生创新创业训练计划项目(scxm035)。

摘　　要：采用一维中红外(MIR)光谱技术开展了软脂酸的结构研究,实验发现:软脂酸主要存在着νas CH3-软脂酸、νsCH3-软脂酸、νas CH2-软脂酸、νs CH2-软脂酸、δCH2-软脂酸、ρCH2-软脂酸和ωCH2-软脂酸等红外吸收模式;采用一维变温中红外(TD-MIR)光谱进一步开展了软脂酸的热稳定性研究,实验发现:在303~393 K的温度范围内,软脂酸的吸收频率及强度都有明显改变,而333~343 K是1个临界温度,进一步进行了机理研究。本项研究拓展了一维MIR光谱及一维TD-MIR光谱在重要的精细化工产品(软脂酸)结构及热稳定性的研究范围。The palmitic acid moleculars tructure had been studied by one-dimensional infrared(IR) spectrum.The experimental results showed that there were νas CH3-palmitic acid, νas CH2-palmitic acid, νs CH3-palmitic acid, νs CH2-palmitic acid, δCH2-palmitic acid, ρCH2-palmitic acid and ωCH2-palmitic acid. One-dimensional temperature-dependent infrared(TD-IR) spectrum of palmitic acid were studied also for the thermal stability of palmitic acid. With the increase of the temperature(303 ~ 393 K), the infrared absorption intensity and frequency of palmitic acid changed obviously, and the 333 ~ 343 K was a critical temperature.Meanwhile, the mechanism was studied also. The study demonstrated the key roles of one-dimensional IR spectrum and one-dimensional TD-IR spectrumin in the analysis of the structure and thermal stability of the important fine chemicals(palmitic acid).

关 键 词：软脂酸 红外光谱 结构 热稳定性 

分 类 号：O434.3[机械工程—光学工程]