Key Laboratory of Applied Physics and Chemistry in Space of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
Sci Rep. 2016 Sep 16;6:33313. doi: 10.1038/srep33313.
We demonstrated polyaniline (PANI) dimensional transformation by adding trace amino-Fe3O4 microspheres to aniline polymerization. Different PANI nanostructures (i.e., flowers, tentacles, and nanofibers) could be produced by controlling the nucleation position and number on the surface of Fe3O4 microspheres, where hydrogen bonding were spontaneously formed between amino groups of Fe3O4 microspheres and aniline molecules. By additionally introducing an external magnetic field, PANI towers were obtained. These PANI nanostructures displayed distinctly different surface wettability in the range from hydrophobicity to hydrophilicity, which was ascribed to the synergistic effect of their dimension, hierarchy, and size. Therefore, the dimension and property of PANI nanostructures can be largely rationalized and predicted by adjusting the PANI nucleation and growth. Using PANI as a model system, the strategies presented here provide insight into the general scheme of dimension and structure control for other conducting polymers.
我们通过在苯胺聚合过程中添加痕量氨基酸 - Fe3O4 微球来实现聚苯胺（PANI）的维度转变。通过控制 Fe3O4 微球表面的成核位置和数量，可以得到不同的 PANI 纳米结构（例如花、触手和纳米纤维），其中 Fe3O4 微球上的氨基与苯胺分子之间会自发形成氢键。通过额外引入外部磁场，可以得到 PANI 塔。这些 PANI 纳米结构在从疏水性到亲水性的范围内表现出明显不同的表面润湿性，这归因于它们的维度、层次结构和尺寸的协同效应。因此，通过调整 PANI 的成核和生长，可以在很大程度上合理化和预测 PANI 纳米结构的维度和性质。使用 PANI 作为模型体系，本文提出的策略为其他导电聚合物的维度和结构控制提供了一般性方案。
