摘要
采用中红外(MIR)光谱技术开展了石蜡油及其杂质的结构研究.实验发现:石蜡油结构红外吸收模式主要包括:CH3基团不对称伸缩振动模式(νasCH3-石蜡油)、CH3基团对称伸缩振动模式(νsCH3-石蜡油)、CH2 基团不对称伸缩振动模式(νasCH2-石蜡油)、CH2 基团对称伸缩振动模式(νsCH2-石蜡油)、CH2基团弯曲振动模式(δCH2-石蜡油)、CH3基团不对称弯曲振动模式(δasCH3-石蜡油)、CH3基团对称弯曲振动模式(δsCH3-石蜡油)、CH2基团面内摇摆振动模式(ρCH2-石蜡油).石蜡油中杂质结构红外吸收模式主要包括:水分子伸缩振动模式(νH2O-杂质-水)、芳基基团C-H伸缩振动模式(νC-H-杂质-芳基)、羰基基团C=O伸缩振动模式(νC=O-杂质-羰基)、水分子弯曲振动模式(δH2O-杂质-水)、芳基基团C=C伸缩振动模式(νC=C-杂质-芳基)、酰胺基团第Ⅰ特征红外吸收谱带(νamideⅠ-杂质-酰胺)和酰胺基团第Ⅱ特征红外吸收谱带(νamideⅡ-杂质-酰胺).石蜡油杂质结构主要包括:芳基化合物、羰基化合物、酰胺化合物及水.MIR光谱初步开展了石蜡油及其杂质结构定性研究,具有重要的应用研究价值.
Abstract
The structure of paraffin oil and its impurities was studied using mid infrared(MIR)spectroscopy technology.The experiment found that the infrared absorption mode of paraffin oil structure mainly includes:CH3 group asymmetric stretching vibration mode(νasCH3-paraffin oil),CH3 group symmetric stretching vibration mode(νsCH3-paraffin oil),CH2 group asymmetric stretching vibration mode(νasCH2-paraffin oil),CH2 group symmetric stretching vibration mode((νsCH2-paraffin oil),CH2 group bending vibration mode(δCH2-paraffin oil),CH3 groups asymmetric bending vibration mode(δsCH3-paraffin oil),CH3 groups symmetric bending vibration mode(δsCH3-paraffin oil)and CH2 group in-plane rocking vibration mode(ρCH2-paraffin oil).The infrared absorption mode of impurity structure in paraffin oil mainly includes water molecule stretching vibration mode(νH2O-impurity-water),aryl group C-H stretching vibration mode(νC-H-impurity-aryl group),carbonyl group C=O stretching vibration mode(νC=O-impurity-carbonyl group),water molecule bending vibration mode(δH2O-impurity-water),aryl group C=C stretching vibration mode(νC=C-impurity-aryl group),the first characteristic infrared absorption band of amide group(νamideⅠ-impurity-amide)and the second characteristic infrared absorption band of amide group(νamideⅡ-impurity-amide).The impurity structures of paraffin oil mainly include aryl group chemical compound,carbonyl group chemical compound,amide group chemical compound and water.The MIR spectroscopy has preliminarily conducted qualitative research on the structure of paraffin oil and its impurities,which has important application research value.
维普
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