Anisotropic Polyaniline/SWCNT Composite Films Prepared by in Situ Electropolymerization on Highly Oriented Polyethylene for High-Efficiency Ammonia Sensor
Anisotropic Polyaniline/SWCNT Composite Films Prepared by in Situ Electropolymerization on Highly Oriented Polyethylene for High-Efficiency Ammonia Sensor
复制标题
高取向聚乙烯原位电聚合制备各向异性聚苯胺/单壁碳纳米管复合薄膜用于高效氨传感器
DOI：
10.1021/acsami.9b13336
复制
发表时间：
2019-10-16
影响因子：
9.5
通讯作者：
Yan, Shouke
中科院分区：
文献类型：
--
作者：
Jiang, Tingcong;Wan, Pengbo;Yan, Shouke
采用原位电聚合法在高密度聚乙烯（HDPE）膜上制备了聚苯胺（PANT）/单壁碳纳米管（SWCNT）各向异性复合膜。偏振紫外-可见光谱和拉曼光谱证实了PANT分子链在复合膜中的各向异性排列。掺杂聚苯胺/0.8重量%单壁碳纳米管的电导率为16.6 +/- 0.2和2.07 +/- 0.2 S cm（-1），分别沿沿着和垂直于HDPE分子链的方向测量。PANI/0.8wt%SWCNT膜作为氨传感器的响应是高得多的沿着HDPE的链方向比垂直于HDPE的链方向，在100 ppm氨的各向异性比为1.8。这归因于取向HDPE膜诱导的PANI/0.8wt%SWCNT的良好有序阵列。此外，PANI/0.8wt%SWCNT的高氨响应可归因于PANT和SWCNT之间的电荷转移效应。
Anisotropic composite films of polyaniline (PANT) with single-walled carbon nanotube (SWCNT) were prepared by in situ electropolymerization on highly oriented high-density polyethylene (HDPE) films. Polarized UV-vis and Raman spectra confirm the anisotropic arrangement of PANT molecular chains in the composite films. The conductivities of 16.6 +/- 0.2 and 2.07 +/- 0.2 S cm(-1) have been obtained for doped PANI/0.8 wt % SWCNT measured along and perpendicular to the direction of the HDPE molecular chain, respectively. The response of PANI/0.8 wt % SWCNT films used as ammonia sensors is much higher along the chain direction of HDPE than that perpendicular to the chain direction of HDPE with an anisotropic ratio of 1.8 at 100 ppm ammonia. This is attributed to the well-ordered array of PANI/0.8 wt % SWCNT induced by the oriented HDPE films. Moreover, the high ammonia response for PANI/0.8 wt % SWCNT may be attributed to the charge-transfer effect between PANT and SWCNT.