含丁二酸酯Gemini阳离子表面活性剂的合成及缓蚀性能

Study on synthesis and corrosion inhibition of ester succinate-containing cationic Gemini surfactants

在甲醇钠催化下,丁二酸二甲酯与N,N-二甲基乙醇胺进行酯交换反应合成二(二甲基胺基乙基)丁二酸酯,产率91.2%(以丁二酸二甲酯计);再与正溴代十二烷或正溴代十六烷反应合成了两种新型含丁二酸酯基的Gem in i阳离子表面活性剂n-CnH2n+1(CH3)2N+CH2CH2OCOCH2CH2COOCH2-CH2N+(CH3)2CnH2n+1-n.2B r(n=12或16)[以二(二甲基胺基乙基)丁二酸酯计,产率85%].研究了其在1 M HC l介质中对碳钢的缓蚀效果,结果表明,在1×10-3mol.L-1时,对碳钢的缓蚀效率分别为97.27%和98.10%.

Bis（2-dimethylaminoethyl） succinate was prepared with 91.2% yield（based on dimethyl succinate） by reacting dimethyl succinate with dimethylaminoethanol in the presence of sodium methoxide.Two kinds of novel ester succinate-containing cationic Gemini surfactants,n-CnH2n＋1（CH3）2N＋CH2CH2-OCOCH2CH2COOCH2CH2N^＋（CH3）2CnH2n＋1-n 2Br（n=12 or 16） were synthesized with 85% yield [based on bis（2-dimethylaminoethyl） succinate]by reacting bis（2-dimethyaninoethyl） succinate with two kinds of alkyl bromides.The corrosion inhibition in 1M HCl was studied. It was founded that the corrosion inhibition efficiency of the two Gemini surfactants were respectively 97.27% and 98.10% at 1 × 10^-3mol.L^-1.