超疏水性聚苯胺微/纳米结构的合成及防腐蚀性能  

Superhydrophobic Polyaniline Micro/Nano Structures as Anticorrosion Coating

作　　者：邢翠娟[1] 于良民[1] 张志明[1] 

机构地区：[1]中国海洋大学,海洋化学理论与工程技术教育部重点实验室,化学化工学院,青岛266100

出　　处：《高等学校化学学报》2013年第8期1999-2004,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50973098);海洋公益性行业科研专项经费(批准号:201005028-2);国家科技支撑计划(批准号:2012BAB15B02)资助

摘　　要：以苯胺为单体,过硫酸铵为氧化剂,通过改变不同的掺杂剂,采用'无模板'法合成了具有不同浸润性的聚苯胺微/纳米结构,并得到超疏水聚苯胺微/纳米结构.采用红外吸收光谱、紫外-可见吸收光谱、X射线衍射及扫描电镜对聚苯胺微/纳米结构及形貌进行了表征,测定了聚苯胺微/纳米结构的接触角,并通过Tafel极化曲线和电化学交流阻抗研究了不同疏水性的聚苯胺微/纳米结构在0.1 mol/L H2SO4溶液中对碳钢的腐蚀防护作用,探讨了聚苯胺微/纳米结构的表面浸润性对腐蚀防护性能的影响.研究结果表明,随着聚苯胺微/纳米结构疏水性的增强,对碳钢的腐蚀防护作用增强,当掺杂剂为全氟辛酸时所制备的超水聚苯胺微/纳米结构表现出最佳的防腐蚀性能(η=94.70%).A ＂template-free＂ method was used to prepare the polyaniline micro/nano structures with different wettability by changing the dopant. The corrosion protection performance of the PANI with different wettability was evaluated in 0.1 mol/L H2SO4 using the potentiodynamic polarization curves and electrochemical impe-dance spectroscopy（EIS）. The effect of the wettability on the anticorrosion performance was investigated. Superhydrophobic PANI micro/nano structures show good anticorrosion properties. This is due to the superhydrophobic conducting PANI coating not only inhibited water from being absorbed by the coating, thus preventing the corrosive chemicals and corrosion products from diffusing through the coating, but also promoting a thin oxide film on the electrode surface.

关 键 词：超疏水性 聚苯胺微 纳米结构 腐蚀与防护 浸润性 

分 类 号：O631[理学—高分子化学]