新型离子液体的合成及其阳离子基团缓蚀性能

化工学报 ›› 2005, Vol. 56 ›› Issue (6): 1112-1119.

新型离子液体的合成及其阳离子基团缓蚀性能

石顺存;易平贵;曹晨忠;王学业;苏界殊;刘军喜

湖南科技大学化学化工学院，湖南湘潭 411201;湘潭大学化学学院，湖南湘潭 411105

出版日期:2005-06-25 发布日期:2005-06-25

Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group

SHI Shuncun;YI Pinggui;CAO Chenzhong;WANG Xueye;SU Jieshu;LIU Junxi

Online:2005-06-25 Published:2005-06-25

摘要/Abstract

摘要： 以高纯环烷酸为原料，合成了一系列含咪唑啉环的新型离子液体Ⅰ～Ⅴ，探讨了阳离子咪唑啉基团中N_（3）原子上取代基与缓蚀性能的关系.采用碳钢挂片失重法和电化学测试法，评价了它们在酸性溶液中的缓蚀性能;采用量子化学法和极化效应指数法，分别计算了离子液体Ⅰ～Ⅴ阳离子咪唑啉基团的前线轨道能量及其相应的PEI等参数.实验结果和理论分析表明：离子液体Ⅰ～Ⅴ阳离子咪唑啉基团的缓蚀效率呈现如下关系，Ⅴ＞Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ;其缓蚀效率与E_HOMO、ΔE_L-H和PEI等参数间均具有良好的线性关系.

关键词: 环烷酸;离子液体;阳离子咪唑啉;缓蚀性能, 量子化学;极化效应指数

Abstract: A series of new ionic liquids Ⅰ—Ⅴ with imidazoline ring were synthesized from highly pure naphthenic acids.The relationship between the alkyl connecting with N_（3） of imidazoline ring and corrosion inhibition performance was investigated.The corrosion inhibition performance was measured by using the mass loss method and electrochemistry method for carbon steel samples in acidic solution.The quantum chemistry method and polarizablity effect index method were used to calculate the parameters such as front molecular orbit energy and corresponding PEI of cationic imidazoline group of ionic liquids Ⅰ—Ⅴ.Measured results and theoretical analyses indicated that corrosion inhibition efficiency of the cationic imidazoline group of ionic liquids Ⅰ—Ⅴ was decreasing as in following order:Ⅴ>Ⅳ>Ⅲ>Ⅱ>Ⅰ，and the corrosion inhibition efficiency had a good linear relationship with the such parameters as E_HOMO,ΔE_L-H and PEI.

Key words: 环烷酸;离子液体;阳离子咪唑啉;缓蚀性能, 量子化学;极化效应指数

石顺存, 易平贵, 曹晨忠, 王学业, 苏界殊, 刘军喜. 新型离子液体的合成及其阳离子基团缓蚀性能 [J]. 化工学报, 2005, 56(6): 1112-1119.

SHI Shuncun, YI Pinggui, CAO Chenzhong, WANG Xueye, SU Jieshu, LIU Junxi. Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group[J]. CIESC Journal, 2005, 56(6): 1112-1119.