采用恒电位电化学沉积法,以十二烷基苯磺酸钠(SDBS)为掺杂剂,通过调节吡咯单体浓度(0.05mol/L、0.10mol/L、0.15mol/L、0.20mol/L)在Q235钢表面制备出系列聚吡咯(PPy)膜层。红外光谱表征显示SDBS成功掺杂到PPy中;扫描电镜显示吡咯单体浓度为0.10mol/L时,得到的PPy颗粒尺寸最小,膜层最为致密;动电位极化曲线和电化学阻抗谱的测试研究了Q235钢表面系列PPy膜层的防腐蚀性能,确定了Py单体浓度为0.10mol/L时,PPy膜层的腐蚀电流Icorr和腐蚀速率CR最小,表现出优异的防腐蚀性能。
A series of polypyrrole (PPy) films were prepared on the surface of Q235 steel by constant potential electrochemical deposition with SDBS as dopant and by adjusting the concentration of pyrrole monomer (0.05mol/L,0.10mol/L,0.15mol/L,0.20mol/L).FT-IR was used to characterize the successful doping of SDBS into PPy.The SEM showed that the Py monomer concentration was 0.10mol/L,the PPy particle size was the smallest,and the film layer was densest.The Q235 steel was tested by the dynamic potential polarization curve and electrochemical impedance spectroscopy.The anti-corrosion performance of the surface series PPy film layer was determined.The corrosion current Icorr and the corrosion rate CR of the PPy film layer were the smallest when the Py monomer concentration was 0.10mol/L,showing excellent corrosion resistance.
[1] Ktari N,Fourati N,Zerrouki C,et al.Design of a polypyrrole MIP-SAW sensor for selective detection of flumequine in aqueous media.correlation between experimental results and DFT calculations[J].RSC Advances,2018,5(108):88666-88674.
[2] Zhu M,Huang Y,Deng Q,et al.Highly flexible,freestanding supercapacitor electrode with enhanced performance obtained by hybridizing polypyrrole chains with MXene[J].Advanced Energy Materials,2016,6(21):1600969.
[3] Hang Z,Lei H,Lu Y.Electromagnetic shielding effectiveness and serviceability of the multilayer structured cuprammonium fabric/polypyrrole/copper (CF/PPy/Cu) composite[J].Chemical Engineering Journal,2016,297:170-179.
[4] Li J,Syed J A,Gao Y,et al.Electropolymerization of camphorsulfonic acid doped conductive polypyrrole anti-corrosive coating for 304SS bipolar plates[J].Applied Surface Science,2017,426:87-98.
[5] Tüken T,Yazici B,Erbil M.The electrochemical synthesis and corrosion performance of polypyrrole on brass and copper[J].Progress in Organic Coatings,2004,51(2):152-160.
[6] Vetter C,Gohmann K,Harper A C,et al.Polypyrrole/aluminum flake hybrids as corrosion inhibitors for aluminum 2024-T3[J].ACS Symposium,2007,1050:151-163.
[7] Zhang L,Liu S,Han H,et al.Studies on the formation process and anti-corrosion performance of polypyrrole film deposited on the surface of Q235 steel by an electrochemical method[J].Surface and Coatings Technology,2017:S0257897217312574.
[8] Vernitskaya T V,Efimov O N.Polypyrrole:a conducting polymer;its synthesis,properties and applications[J].Russian Chemical Reviews,1997,66(5):443-457.
[9] Jiang L,Syed J A,Gao Y,et al.Electropolymerization of camphorsulfonic acid doped conductive polypyrrole anti-corrosive coating for 304SS bipolar plates[J].Applied Surface Science,2017,426:87-98.
[10] Chen Z H,Yang W H,Xu B,et al.Corrosion behaviors and physical properties of polypyrrole-molybdate coating electropolymerized on carbon steel[J].Progress in Organic Coatings,2018,122:159-169.
[11] Qi K,Qiu Y,Chen Z,et al.Corrosion of conductive polypyrrole:effects of environmental factors,electrochemical stimulation,and doping anions[J].Corrosion Science,2012,60:50-58.
[12] Lu M,Xie R,Liu Z,et al.Enhancement in electrical conductive property of polypyrrole-coated cotton fabrics using cationic surfactant[J].Journal of Applied Polymer Science,2016,133(32).
[13] Khani O,Nemati F,Farrokhi H,et al.Synthesis and characterization of electromagnetic properties of polypyrrole nanorods prepared via self-reactive MnO2,template[J].Synthetic Metals,2016,220:567-572.
[14] Shi W,Liang P,Ge D,et al.Starch-assisted synthesis of polypyrrole nanowires by a simple electrochemical approach[J].Chemical Communications,2007,23(23):2414-2416.
[15] Aoki P H B,Volpati D,Caetano W,et al.Study of the interaction between cardiolipin bilayers and methylene blue in polymer-based layer-by-layer and langmuir films applied as membrane mimetic systems[J].Vibrational Spectroscopy,2010,54(2):93-102.
[16] Vijayalekshmi V,Khastgir D.Eco-friendly methanesulfonic acid and sodium salt of dodecylbenzene sulfonic acid doped cross-linked chitosan based green polymer electrolyte membranes for fuel cell applications[J].Journal of Membrane Science,2017,523:45-59.
[17] Li F,Yu B,Jia C,et al.Synthesis and application of widely soluble graphene sheets[J].Langmuir,2010,26(14):12314-12320.
[18] Liu M L,Zhang Y Y,Wang M L,et al.Adsorption of bovine serum albumin and fibrinogen on hydrophilicity-controllable surfaces of polypyrrole doped with dodecyl benzene sulfonate—a combined piezoelectric quartz crystal impedance and electrochemical impedance study[J].Polymer,2006,47(10):3372-3381.
[19] Omrani A,Rostami H,Minaee R.Electrochemical synthesis of polypyrrole/polyhedral oligomeric silsesquioxane nanocomposite on copper for corrosion protection[J].Progress in Organic Coatings,2016,90:331-338.
[20] Creus J,Mazille H,Idrissi H.Porosity evaluation of protective coatings onto steel,through electrochemical techniques[J].Surface & Coatings Technology,2000,130(2-3):224-232.
