Kim Jae-Young, Jang Hyo-Jun, Jung Eunyoung, Bae Gyutae, Lee Soonwon, Park Choon-Sang, Shin Bhumjae, Tae Heung-Sik
School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea.
School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea.
Nanomaterials (Basel). 2021 Sep 6;11(9):2315. doi: 10.3390/nano11092315.
The morphological and chemical properties of polyaniline (PANI) nanocomposite films after adding small amounts of auxiliary gases such as argon, nitrogen, and oxygen during atmospheric pressure (AP) plasma polymerization are investigated in detail. A separate gas-supply line for applying an auxiliary gas is added to the AP plasma polymerization system to avoid plasma instability due to the addition of auxiliary gas during polymerization. A small amount of neutral gas species in the plasma medium can reduce the reactivity of monomers hyperactivated by high plasma energy and prevent excessive crosslinking, thereby obtaining a uniform and regular PANI nanocomposite film. The addition of small amounts of argon or nitrogen during polymerization significantly improves the uniformity and regularity of PANI nanocomposite films, whereas the addition of oxygen weakens them. In particular, the PANI film synthesized by adding a small amount of nitrogen has the best initial electrical resistance and resistance changing behavior with time after the ex situ iodine (I)-doping process compared with other auxiliary gases. In addition, it is experimentally demonstrated that the electrical conductivity of the ex situ I-doped PANI film can be preserved for a long time by isolating it from the atmosphere.
详细研究了在大气压（AP）等离子体聚合过程中添加少量诸如氩气、氮气和氧气等辅助气体后聚苯胺（PANI）纳米复合薄膜的形态和化学性质。在AP等离子体聚合系统中添加了一条用于施加辅助气体的单独气体供应管线，以避免由于在聚合过程中添加辅助气体而导致的等离子体不稳定。等离子体介质中的少量中性气体物种可以降低被高等离子体能量过度激活的单体的反应性，并防止过度交联，从而获得均匀且规则的PANI纳米复合薄膜。在聚合过程中添加少量氩气或氮气可显著提高PANI纳米复合薄膜的均匀性和规则性，而添加氧气则会削弱它们。特别是，与其他辅助气体相比，通过添加少量氮气合成的PANI薄膜在异位碘（I）掺杂过程后的初始电阻和电阻随时间的变化行为最佳。此外，实验证明，通过将异位I掺杂的PANI薄膜与大气隔离，可以长时间保持其电导率。
