物理化学学报 >> 2014, Vol. 30 >> Issue (3): 583-588.doi: 10.3866/PKU.WHXB201401031

材料物理化学 上一篇    

一步法合成聚苯胺/十二烷基苯磺酸钠超疏水复合材料

宋根萍, 夏冬祥   

  1. 扬州大学化学化工学院, 江苏扬州 225002
  • 收稿日期:2013-09-17 修回日期:2014-01-03 发布日期:2014-02-27
  • 通讯作者: 宋根萍 E-mail:gpsong@yzu.edu.cn
  • 基金资助:

    江苏省环境材料和环境工程重点实验室项目(017375003k11034)资助

One-Step Preparation of Superhydrophobic Polyaniline/Sodium Dodecylbenzenesulfonate Composites

SONG Gen-Ping, XIA Dong-Xiang   

  1. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu Province, P. R. China
  • Received:2013-09-17 Revised:2014-01-03 Published:2014-02-27
  • Contact: SONG Gen-Ping E-mail:gpsong@yzu.edu.cn
  • Supported by:

    The project was supported by the Key Laboratory of Environment Materials and Engineering of Jiangsu Province, China (017375003k11034).

摘要:

在阴离子表面活性剂十二烷基苯磺酸钠(SDBS)体系中,采用一步法制得聚苯胺/SDBS超疏水复合材料. 利用场发射扫描电子显微镜(FESEM)观察产物形貌并测定其元素组成. 通过傅里叶变换红外光谱仪、紫外-可见光谱仪、X射线衍射等对其结构进行表征,用视频接触角测量仪测定材料的亲疏水性. 考察SDBS浓度和溶液酸度对产物形貌及疏水性能的影响,探讨疏水机理. 结果表明:在pH=1-9,SDBS浓度大于0.016 mol·L-1条件下,所制备复合材料的水接触角大于150°,SDBS掺杂使得苯胺单体的转化率高达98%. 两亲分子SDBS亲水磺酸基与聚苯胺主链上的亚胺基不仅存在静电引力,而且能形成磺酰胺键,聚苯胺主链间又以氢键相互连接,SDBS分子的疏水烃基有序排列朝向聚苯胺主链外侧,从而组装形成具有微纳结构的聚苯胺/SDBS超疏水复合材料. 本文结果有利于更好地理解聚苯胺/SDBS超疏水性复合材料的形成机理,对超疏水材料的设计提供新思路.

关键词: 超疏水, 聚苯胺, 一步法, 十二烷基苯磺酸钠, 复合材料

Abstract:

Superhydrophobic polyaniline (PANI)/sodium dodecylbenzenesulfonate (SDBS) composites were fabricated in one-step, by the oxidative polymerization of aniline in the presence of SDBS. The morphology and elemental composition of the PANI/SDBS composite were characterized by field-emission scanning electron microscopy. The chemical structure was confirmed by Fourier transform-infrared spectroscopy, ultraviolet-visible spectrophotometry, and X-ray powder diffraction. The superhydrophilic and superhydrophobic properties of the PANI/SDBS composite were determined from water contact angle (WCA) measurements, and were dependent on SDBS concentration, pH, and composite morphology. The formation and superhydrophobic mechanism of the PANI/SDBS composite are discussed. The composite surface had a WCA of >150° at pH 1-9 and SDBS concentration more than 0.016 mol·L-1. SDBS doping resulted in a 98% conversion of the aniline monomer. The superhydrophobic PANI/SDBS composite formed from electrostatic interaction, and sulfamic bonding between the hydrophilic ―SO3- groups of SDBS and ―NH+= of PANI chains. Hydrogen bonding existed between N and H atoms among PANI chains. The electrostatic interaction and hydrogen bonding immobilized the hydrophilic ―SO3- head groups of SDBS around PANI chains, which resulted in the SDBS hydrophobic alkyl chain protruding. These results aid our understanding of the formation of superhydrophobic PANI/SDBS composites, and the design of superhydrophobic materials.

Key words: Superhydrophobicity, Polyaniline, One-step method, Sodium dodecylbenzenesulfonate, Composite

MSC2000: 

  • O647