Liu Penghong, Wu Shaohua, Zhang Yue, Zhang Hongnan, Qin Xiaohong
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China.
Nanomaterials (Basel). 2016 Jun 23;6(7):121. doi: 10.3390/nano6070121.
Highly orientated polypyrrole (PPy)-coated polyacrylonitrile (PAN) (PPy-PAN) nanofiber yarn was prepared with an electrospinning technique and chemical polymerization. The morphology and chemical structure of PPy-PAN nanofiber yarn was characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FTIR), which indicated that the PPy as the shell layer was homogeneously and uniformly polymerized on the surface of PAN nanofiber. The effects of different concentration of doping acid on the responses of PPy-PAN nanofiber yarn sensor were investigated. The electrical responses of the gas sensor based on the PPy-PAN nanofiber yarn to ammonia were investigated at room temperature. The nanoyarn sensor composed of uniaxially aligned PPy-PAN nanofibers with a one-dimensional structure exhibited a transient response, and the response time was less than 1 s. The excellent sensing properties mentioned above give rise to good potential application prospects in the field of ammonia sensor.
采用静电纺丝技术和化学聚合方法制备了高度取向的聚吡咯（PPy）包覆聚丙烯腈（PAN）（PPy-PAN）纳米纤维纱线。通过扫描电子显微镜（SEM）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）和傅里叶变换红外光谱（FTIR）对PPy-PAN纳米纤维纱线的形态和化学结构进行了表征，结果表明，作为壳层的PPy在PAN纳米纤维表面均匀且均一聚合。研究了不同浓度掺杂酸对PPy-PAN纳米纤维纱线传感器响应的影响。在室温下研究了基于PPy-PAN纳米纤维纱线的气体传感器对氨气的电响应。由具有一维结构的单轴排列PPy-PAN纳米纤维组成的纳米纱线传感器表现出瞬态响应，响应时间小于1 s。上述优异的传感性能使其在氨气传感器领域具有良好的潜在应用前景。
