显微红外光谱在摩擦学中的应用

Application of FTIR Micro-spectroscopy in the Tribology

用显微红外光谱测定了羟基植物油脂肪酸在摩擦过程中生成聚酯的特征吸收峰νasC—O—C 的波数 ,由聚酯的折合质量分析了特征吸收峰νasC—O—C 的波数位移 ,据此导出了羟基植物油脂肪酸的抗磨性顺序规律与振动吸收峰位置的内在联系 ,合理解释了νasC—O—C 从小到大的顺序 (13,14 二羟基廿二酸 <13(14) 羟基廿二酸 =9,10 二羟基十八酸 <9,10 ,12 三羟基十八酸 <9(10 ) 羟基十八酸 )与羟基酸的抗磨性从好到差的顺序(13,14 二羟基廿二酸 >13(14) 羟基廿二酸 =9,10 二羟基十八酸 >9,10 ,12 羟基十八酸 >9(10 ) 羟基十八酸 )的一致性。 13,14 二羟基廿二酸形成网状聚酯膜 ,9(10 )

The wave number of characteristic absorption peak v(C-O-C)(as) of the polyester formed on the frictional process were determined by Fourier Transform Infrared (FTIR) Micro-spectroscopy, and the wave number displacement of characteristic absorption peak v(C-O-C)(as) was analyzed based on the conversion mass of polyester formed. The internal relations between anti-wear order rule of hydroxyl fatty acids and vibration absorption peak v(C-O-C)(as) of polyester formed by hydroxyl fatty acids was deduced according to these results, and the anti-wear order of hydroxyl fatty acids was reasonably explained, that is 13, 14-di-hydroxydooosanoic acid > 13 (14)-monohydroxydooosanoic acid = 9, 10-dihydroxyoctadecanoic acid > 9,10, 12-trihydroxyoctadecanoic acid > 9(10)-monohydroxyoctadecanoic acid. A net polyester film is formed by 13, 14-dihydroxydocosanoic acid and a linear polyester film is formed by 9, (10)-monohydroxyoctadecanoic acid and 13(14)-monohydroxydooosanoic acid.