利用阴离子表面活性剂十二烷基苯磺酸钠(SDBS)的两亲性,通过原位聚合法制得超疏水性聚苯胺(PANI)材料,将PANI与环氧树脂共混得到复合涂层,通过傅里叶变换红外光谱仪、紫外-可见分光光度计对超疏水性PANI的组成进行分析,并测定了复合涂层在0.5mol/L H2SO4溶液中的防腐蚀性能。结果表明:在pH≤7,SDBS浓度为0.025mol/L条件下,合成的PANI具有良好且稳定的疏水性能,水接触角超过150°;超疏水性PANI的加入能明显提高复合涂层的防腐蚀性能,在PANI添加量为0.75%(质量分数)时复合涂层耐腐蚀性能优良,其腐蚀电流密度为1.08μA/cm2,腐蚀电位为0.426V。
In order to obtain super-hydrophobic polyaniline(PANI),anionic surfactant sodium dobecyl benzene sulfonate (SDBS) with the amphiphilic property was used by in-situ polymerization,and optimized the synthesis conditions.It was shown that the composites had good and stable hydrophobic property,and the water contact angle was more than 150° under the conditions of pH≤7 and the concentration of SDBS was 0.025mol/L.Subsequently,the composite coatings were made by blending PANI with epoxy resin (EP) in a certain proportion,and then its corrosion resistances were measured in 0.5mol/L H2SO4.The results indicated that the addition of PANI could significantly improve the corrosion resistance of the coating that was good and stable when the mixing ratio was 0.75%(mass fraction) with the corrosion current density was 1.08μA/cm2 and the corrosion potential was 0.426V.
[1] Reut J,Opik A,Idla K.Corrosion behavior of polypyrrole coated mild steel[J].Synth Met,1999,102(1/2/3):1392-1393.
[2] Zarras P,Anderson N,Webber C,et al.Progress in using conductive polymers as corrosion-inhibiting coatings[J].Radiation Physics and Chemistry,2003,68(3/4):387-394.
[3] Santos J R,Mattoso L H C,Motheo A J.Investigation of corrosion protection of steel by polyaniline films[J].Electrochimica Acta,1998,43(3/4):309-313.
[4] Tallman D E,Spinks G,Dominis A,et al.Electroactive conducting polymers for corrosion control[J].Journal of Solid State Electrochemistry,2001,6(2):73-84.
[5] Deberry D W J C.Modification of the electrochemical and corrosion behavior of stainless steels with an electroactive coating[J].Journal of the Electrochemical Society,1985,16(37):1022-1026.
[6] Wessling B J A M.Passivation of metals by coating with polyaniline:corrosion potential shift and morphological changes[J].Advanced Materials,1994,6(3):226-228.
[7] Martyak N M,Mcandrew P.Corrosion performance of steel coated with co-polyamides and polyaniline[J].Corrosion Science,2007,49(10):3826-3837.
[8] Fahlman M,Crispin X,Guan H,et al.Polyaniline-metal interfaces:implications on corrosion protection of steel and aluminum alloys[J].Abstr Pap Am Chem Soc,2000,220(2):253.
[9] Popovic M M,Grgur B N,Miskovic-Stankovic V B.Corrosion studies on electrochemically deposited PANI and PANI/epoxy coatings on mild steel in acid sulfate solution[J].Prog Org Coat,2005,52(4):359-365.
[10] Pourhashem S,Vaezi M R,Rashidi A,et al.Exploring corrosion protection properties of solvent based epoxy-graphene oxide nanocomposite coatings on mild steel[J].Corrosion Science,2017,115:78-92.
[11] Montemor M F.Functional and smart coatings for corrosion protection:a review of recent advances[J].Surface and Coatings Technology,2014,258:17-37.
[12] Mohamed A M A,Abdullah A M,Younan N A.Corrosion behavior of superhydrophobic surfaces:a review[J].Arabian Journal of Chemistry,2015,8(6):749-765.
[13] Zhu Y,Li J,Wan M,et al.3D-boxlike polyaniline microstructures with super-hydrophobic and high-crystalline properties[J].Polymer,2008,49(16):3419-3423.
[14] Zhu Y,Li J,Wan M,et al.Superhydrophobic 3D microstructures assembled from 1D nanofibers of polyaniline[J].Macromolecular Rapid Communications,2008,29(3):239-243.
[15] 钟文斌,熊昌伦.自组装合成超疏水聚苯胺片状多级结构[J].湖南大学学报(自然科学版),2017,44(12):69-73.
[16] Chang C H,Huang T C,Peng C W,et al.Novel anticorrosion coatings prepared from polyaniline/graphene composites[J].Carbon,2012,50(14):5044-5051.
PDF
