乙醇胺改性聚环氧琥珀酸衍生物的合成及其阻垢缓蚀性能  

Synthesis of Ethanolamine Modified Polyepoxysuccinic Acid Derivatives and Their Corrosion Inhibition Properties

作　　者：柳鑫华 贾静娴[1] 张红霞[1] 王鹏飞 王磊[1] 吴卫华 LIU Xin-hua;JIA Jing-xian;ZHANG Hong-xia;WANG Peng-fei;WANG Lei;WU Wei-hua(Department of Chemistry,Tangshan Normal University,Tangshan 063000,China;Tangshan Key Laboratory of Green Specialty Chemicals,Tangshan 063000,China;Library of North China University of Science and Technology,Tangshan 063000,China)

机构地区：[1]唐山师范学院化学系,河北唐山063000 [2]唐山市绿色专用化学品重点实验室,河北唐山063000 [3]华北理工大学图书馆,河北唐山063000

出　　处：《表面技术》2020年第8期292-301,共10页Surface Technology

基　　金：河北省钢铁联合自然基金(B2017209228);唐山师范学院博士基金(2018A04)。

摘　　要：目的为了改变绿色阻垢剂聚环氧琥珀酸(PESA)单一性的功能结构,合成乙醇胺改性的多功能聚环氧琥珀酸衍生物(MEA-PESA),以提高PESA阻垢缓蚀性能,并证明MEA-PESA阻垢缓蚀机理。方法顺酐通过环化反应得到环氧琥珀酸(ESA),再通过聚合反应得到PESA,通过PESA与乙醇胺(MEA)氨解缩合,反应得到MEA-PESA,通过红外光谱(FTIR)、核磁氢谱(HNMR)表征了PESA和MEA-PESA的结构。利用电化学极化曲线研究了MEA-PESA的缓蚀机理。结果MEA-PESA合成的最佳条件:聚环氧琥珀酸与乙醇胺的质量比为10∶7,改性温度为80℃,改性时间为2 h,搅拌速率为1500 r/min。当MEA-PESA的质量浓度为16 mg/L,阻碳酸钙可达95%,阻磷酸钙可达97%;MEA-PESA的质量分数为150 mg/L时,缓蚀率可达73%,比等浓度PESA提高了12%。利用扫描电镜和红外光谱对钙垢的晶型进行了考察,谱图峰值发生移动,出现不稳定结构的峰,稳定结构的峰减小,电镜图中的晶型结构由紧密变得疏松。MEA-PESA为抑制阳极反应为主的混合型缓蚀剂,腐蚀电流减小,腐蚀电位增大。结论在相同的阻垢、缓蚀实验条件下,MEA-PESA阻碳酸钙、磷酸钙和缓蚀性能都优于PESA,极大地拓宽了PESA的应用范围。The work aims to synthesize a multifunctional polyepoxysuccinic acid derivative(MEA-PESA)modified by ethanolamine to change the single-functional structure of green scale inhibitor polyepoxysuccinic acid(PESA),thus improving the scale and corrosion inhibition properties of PESA and verifying the mechanism of scale and corrosion inhibition of MEAPESA.Epoxysuccinic acid(ESA)was obtained from maleic anhydride through cyclic reaction,and then PESA was obtained through polymerization reaction.Finally,MEA-PESA was obtained by condensation of PESA and ethanolamine(MEA).The structures of PESA and MEA-PESA were characterized by FTIR and HNMR.The optimum conditions of MEA-PESA synthesis:the mass ratio of polyepoxysuccinic acid and ethanolamine was 10∶7,the modification temperature was 80℃,the modification time was 2 h,and the stirring rate was 1500 r/min.When the concentration of MEA-PESA was 16 mg/L,the resistance of calcium carbonate and calcium phosphate reached 95%and 97%respectively.At 150 mg/L,the corrosion inhibition rate of MEA-PESA was 73%,12%higher than that of PESA.Scanning electron microscope(SEM)and infrared spectroscopy(FTIR)were used to investigate the crystal pattern of calcium scale.The peak value of calcium scale crystal pattern shifted,and the peak of unstable crystal appeared,while the peak of stable crystal decreased,and the crystal structure in the electron microscope image changed from compact to loose.Corrosion inhibition mechanism of MEA-PESA was studied by electrochemical polarization curve.MEA-PESA was a mixed corrosion inhibitor which mainly inhibited the anode reaction.The corrosion current decreased,but the corrosion potential increased.Under the same scale and corrosion inhibition test conditions,MEA-PESA is better than PESA in inhibiting calcium carbonate,calcium phosphate and corrosion inhibition,which has better application value for expanding the application range of PESA.

关 键 词：多功能聚环氧琥珀酸衍生物 分子合成 阻垢缓蚀性能 阻垢缓蚀机理 

分 类 号：TG174.42[金属学及工艺—金属表面处理]