不同碳链长度对称双咪唑啉缓蚀剂的合成与性能研究  

Synthesis and performance study of symmetrical dimeric imidazoline corrosion inhibitors with varying carbon chain lengths

作　　者：向方远 江鹏 何牧 周晴[1] 胡怡超 周晓龙[1] XIANG Fangyuan;JIANG Peng;HE Mu;ZHOU Qing;HU Yichao;ZHOU Xiaolong(Green Energy Chemical International Joint Research Center,East China University of Science and Technology,Shanghai 200030,China;College of Chemical Engineering,Anqing Normal University,Anqing 246011,China)

机构地区：[1]华东理工大学绿色能源化工国际联合研究中心,上海200030 [2]安庆师范大学化工学院,安徽安庆246011

出　　处：《应用化工》2024年第7期1536-1539,1545,共5页Applied Chemical Industry

基　　金：中央高校基本科研业务费专项资金资助。

摘　　要：以月桂酸、肉豆蔻酸、棕榈酸、硬脂酸和四乙烯五胺为主要原料,反应条件为原料摩尔比1∶1.2,经酰胺化4 h,酰胺化温度150℃,环化4 h,环化温度190℃;后加入氯化苄进行材料改性,反应条件为摩尔比1∶1.2,反应时间10 h,反应温度80℃,得到烷基碳链长度分别为C11(LIRQ)、C13(MIRQ)、C15(MIRQ)、C17(PIRQ)的双对称咪唑啉缓蚀剂。采用红外光谱对其官能团结构进行表征,采用静态失重法和电化学极化曲线法,并通过透射电镜观察试片表面形貌,探究烷基链长度对缓蚀性能的影响。失重实验和极化曲线结果表明,在1 mol/L HCl介质中,随着烷基链长度增加,缓蚀剂浓度和实验温度提高其缓蚀率逐渐增加。Using lauric acid,myristic acid,palmitic acid,stearic acid,and tetraethylenepentamine as primary raw materials,with a molar ratio of 1∶1.2,amidation was conducted for 4 h at 150℃followed by cyclization for 4 h at 190℃.Subsequently,benzyl chloride was added for material modification at a molar ratio of 1∶1.2,with a reaction time of 10 h at 80℃.This process yielded double symmetric imidazoline corrosion inhibitors with alkyl chain lengths of C11(LIRQ),C13(MIRQ),C15(MIRQ),and C17(PIRQ).Functional group structures were characterized using infrared spectroscopy.The corrosion inhibition performance was studied by static weight loss experiments,electrochemical polarization curves,and observation of sample surface morphology using transmission electron microscopy.The weight loss experiments and polarization curve results demonstrate that in a 1 mol/L HCl medium,as the alkyl chain length increases,the corrosion inhibitor concentration,and experimental temperature gradually increase,leading to an enhanced corrosion inhibition rate.Through linear simulation,it was found that these inhibitors chemically adsorb on the metal surface and follow the Langmuir adsorption isotherm equation.

关 键 词：对称双咪唑啉缓蚀剂 烷基链长度 失重法 电化学测试 缓蚀性能 

分 类 号：TQ9[化学工程] TG174.42[金属学及工艺—金属表面处理]