十二烷基苯磺酸掺杂聚吡咯在阳极-阴极交替极化下的防污性能

Antifouling Properties of Dodecyl Benzene Sulfonic Acid Doped Polypyrrole Under Alternating Anodic-cathodic Polarization

采用化学氧化聚合法合成了一系列十二烷基苯磺酸掺杂的聚吡咯(PPy-DBSA),并研究了其电化学防污性能.循环伏安(CV)曲线表明,PPy-DBSA在天然海水中具有良好的电化学活性和稳定性.采用循环伏安扫描方法实现阳极极化和阴极极化交替进行,并对极化后的PPy-DBSA电极进行了抑菌性能研究,发现PPy-DBSA在循环伏安阳极-阴极交替(-1. 0~2. 0 V vs. SCE)极化下,可成功抑制微生物(大肠杆菌)的附着,其中在-0. 6~0. 8 V范围内循环伏安阳极-阴极交替极化20 min时防污效果最佳,抑菌率可达99. 8%,明显优于恒电位阳极极化和恒电位阴极极化的结果.

Dodecyl benzene sulfonic acid doped polypyrrole(PPy DBSA)samples were synthesized by oxidative chemical polymerization,and their electrochemical antifouling performances were studied.Cyclic voltammetry(CV)curve showed that PPy DBSA had excellent electrochemical activity and stability in natural seawater.The antimicrobial activity of PPy DBSA under alternating anodic cathodic polarization was verified by CV curve.It was found that the adhesion of microorganisms(E.coli)to PPy DBSA electrode was efficiently inhibited by cyclic voltammetry scanning(-1.0—2.0 V vs.SCE)under alternating anodic cathodic polariza tion.The inhibition rate could reach 99.8% after alternating anodic cathodic polarization between-0.6 V and 0.8 V for 20 min,which is superior to that under pure anodic polarization and pure cathodic polarization.