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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.
In the anionic surfactant sodium dodecylbenzenesulfonate (SDBS) system, one-step polyaniline / SDBS superhydrophobic composites were prepared.The morphology of the product was observed by field emission scanning electron microscopy (FESEM) and its elemental composition The structure of the material was characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy and X-ray diffraction, and the hydrophilicity and hydrophobicity of the material were measured by the video contact angle measuring instrument.The effects of SDBS concentration and solution acidity on the morphology and hydrophobicity The results show that the water contact angle of the prepared composite is more than 150 ° when the concentration of SDBS is greater than 0.016 mol·L-1 at pH = 1-9 and the SDBS doping makes the conversion of aniline monomer Up to 98% .The amphiphilic SDBS hydrophilic sulfonic acid group and polyaniline main chain imine not only electrostatic attraction, but also the formation of sulfonamide bond, the polyaniline backbones and hydrogen bonds with each other, SDBS molecules The hydrophobic hydrocarbon groups are arranged in an orderly manner towards the outer side of the polyaniline main chain to assemble the polyaniline / SDBS superhydrophobic composites with micro / nano structure. The results herein are helpful to better understand the shape of polyaniline / SDBS superhydrophobic composites Into a mechanism that provides new ideas for the design of superhydrophobic materials.