School of Chemical and Biological Engineering College of Engineering, Seoul National University, 599 Gwanangno, Gwanakgu, Seoul 151-742, Korea.
Small. 2010 Mar 8;6(5):679-86. doi: 10.1002/smll.200902231.
A facile way to synthesize nanometer-sized polymer (polypyrrole, PPy) particles is explored on the basis of the formation of complexes between water-soluble polymers and metal cations in aqueous solution. The metal cation is used as an oxidizing agent to initiate the chemical oxidation polymerization of the corresponding monomer, and the water-soluble polymer effectively provides a steric stability for the growth of polymer nanoparticles during the polymerization process. Light-scattering analyses are performed to give insight into the behavior of the complexes in aqueous solution. In addition, major physical parameters affecting the formation of polymer nanoparticles are investigated, including hydrodynamic radius, radius of gyration, shape factor, and viscosity. By judicious control of these parameters, PPy nanoparticles with narrow size distribution can be readily fabricated in large quantities. It is also possible to control the diameter of the nanoparticles by changing critical synthetic variables. Importantly, PPy nanoparticles of approximately 20-60 nm in diameter can be prepared without using any surfactants or specific templates; this novel strategy offers great possibility for mass production of polymer nanoparticles.
一种简便的方法来合成纳米级聚合物（聚吡咯，PPy）颗粒是探索水溶性聚合物和金属阳离子在水溶液中形成复合物的基础上。金属阳离子用作氧化剂，引发相应单体的化学氧化聚合，而水溶性聚合物在聚合过程中有效地为聚合物纳米颗粒的生长提供了空间稳定性。光散射分析用于深入了解复合物在水溶液中的行为。此外，还研究了影响聚合物纳米颗粒形成的主要物理参数，包括水动力半径、回转半径、形状因子和粘度。通过巧妙地控制这些参数，可以大量制备具有较窄粒径分布的 PPy 纳米颗粒。通过改变关键的合成变量，也可以控制纳米颗粒的直径。重要的是，无需使用任何表面活性剂或特定模板即可制备直径约为 20-60nm 的 PPy 纳米颗粒；这种新颖的策略为聚合物纳米颗粒的大规模生产提供了很大的可能性。
