Shin Jun-Goo, Park Choon-Sang, Jung Eun Young, Shin Bhum Jae, Tae Heung-Sik
School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea.
Department of Electronics Engineering, Sejong University, Seoul 05006, Korea.
Polymers (Basel). 2019 Jan 9;11(1):105. doi: 10.3390/polym11010105.
This work researched polymerization of liquid aniline monomer by solution plasma with a gas bubble channel and investigated characteristics of solution plasma and polyaniline (PANI). The injected gas bubble channel in the proposed solution plasma process (SPP) played a significant role in producing a stable discharge in liquid aniline monomer at a low voltage and furthermore enhancing the contact surface area between liquid aniline monomer and plasma, thereby achieving polymerization on the boundary of the liquid aniline monomer and plasma. Solution plasma properties were analyzed with voltage⁻current, optical emission spectroscopy, and high-speed camera. Conductivity, percentage yield, and firing voltage of PANI nanoparticle dispersed solution were measured. To investigate the characteristics of synthesized PANI nanoparticles, field emission scanning electron microscopy, dynamic light scattering, transmission electron microscopy, selective area electron diffraction (SAED) pattern, Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography, ¹H-nuclear magnetic resonance (¹H-NMR), and X-ray photo spectroscopy (XPS) were examined. The FTIR, ¹H-NMR, and XPS analysis showed the PANI characteristic peaks with evidence that some quinoid and benzene rings were broken by the solution plasma process with a gas bubble channel. The results indicate that PANI nanoparticles have a spherical shape with a size between 25 and 35 nm. The SAED pattern shows the amorphous pattern.
本研究通过带有气泡通道的溶液等离子体对液态苯胺单体进行聚合反应，并研究了溶液等离子体和聚苯胺（PANI）的特性。在所提出的溶液等离子体过程（SPP）中注入的气泡通道在低电压下在液态苯胺单体中产生稳定放电方面发挥了重要作用，并且进一步增加了液态苯胺单体与等离子体之间的接触表面积，从而在液态苯胺单体与等离子体的边界处实现聚合。利用电压-电流、发射光谱和高速摄像机对溶液等离子体特性进行了分析。测量了聚苯胺纳米颗粒分散溶液的电导率、产率百分比和点火电压。为了研究合成的聚苯胺纳米颗粒的特性，对场发射扫描电子显微镜、动态光散射、透射电子显微镜、选区电子衍射（SAED）图谱、傅里叶变换红外光谱（FTIR）、凝胶渗透色谱、¹H-核磁共振（¹H-NMR）和X射线光电子能谱（XPS）进行了检测。FTIR、¹H-NMR和XPS分析显示了聚苯胺特征峰，表明一些醌环和苯环在带有气泡通道的溶液等离子体过程中被破坏。结果表明，聚苯胺纳米颗粒呈球形，尺寸在25至35纳米之间。SAED图谱显示为非晶态图谱。
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