Department of Physical Chemistry, Faculty of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius 6, Lithuania.
Langmuir. 2011 Sep 6;27(17):10970-6. doi: 10.1021/la201962a. Epub 2011 Jul 27.
A very simple, environmentally friendly, one-step oxidative polymerization route to fabricate polypyrrole (Ppy) nanoparticles of fixed size and morphology was developed and investigated. The herein proposed method is based on the application of sodium dodecyl sulfate and hydrogen peroxide, both easily degradable and cheap materials. The polymerization reaction is performed on 24 h time scale under standard conditions. We monitored a polaronic peak at 465 nm and estimated nanoparticle concentration during various stages of the reaction. Using this data we proposed a mechanism for Ppy nanoparticle formation in accordance with earlier emulsion polymerization mechanisms. Rates of various steps in the polymerization mechanism were accounted for and the resulting particles identified using atomic force microscopy. Application of Ppy nanoparticles prepared by the route presented here seems very promising for biomedical applications where biocompatibility is paramount. In addition, this kind of synthesis could be suitable for the development of solar cells, where very pure and low-cost conducting polymers are required.
开发并研究了一种非常简单、环保、一步氧化聚合方法，用于制备固定尺寸和形态的聚吡咯（Ppy）纳米粒子。该方法基于十二烷基硫酸钠和过氧化氢的应用，这两种材料都容易降解且廉价。聚合反应在标准条件下进行 24 小时。我们监测到 465nm 处的极化子峰，并在反应的各个阶段估计纳米粒子的浓度。根据这一数据，我们提出了一种与早期乳液聚合机制相符的 Ppy 纳米颗粒形成机制。聚合机制中各步骤的速率被计算，并使用原子力显微镜识别得到的颗粒。这里提出的路线制备的 Ppy 纳米粒子在生物医学应用中似乎很有前景，因为生物相容性至关重要。此外，这种合成方法可能适用于太阳能电池的开发，需要非常纯净和低成本的导电聚合物。
