聚吡咯
碳纳米管
纳米复合材料
材料科学
热塑性聚氨酯
傅里叶变换红外光谱
导电聚合物
涂层
化学工程
复合材料
聚合物
聚合
弹性体
工程类
作者
Lei Yan,Tanghong Xiong,Zhao-Xin Zhang,Han‐Seung Yang,Xuntao Zhang,Yang He,Jun Bian,Huilong Lin,Daiqiang Chen
标识
DOI:10.1016/j.compositesa.2022.106913
摘要
Thermoplastic polyurethane (TPU) conductive nanocomposites were fabricated by using TPU as a matrix and polypyrrole (PPy) coating multi-walled carbon nanotubes (MWCNTs) as conductive filler. The microstructure and gas-sensitive response properties of the nanocomposites to volatile organic vapors (VOCs) were systematically investigated. FTIR and HRTEM verified that PPy was successfully encapsulated on the surface of MWCNTs. FESEM showed that homogeneous dispersion of MWCNTs-g-PPy conductive nanofillers contributed to the formation of continuous conductive networks. The obtained TPU/MWCNTs-g-PPy nanocomposites possessed certain gas-sensitive response selectivity, especially for ammonia gas when compared with other target VOCs. The gas-sensitive response values were in the range of 90–100% with a response time of 40–50 s. An excellent recovery performance at 500 ppm ammonia atmosphere was also achieved. Moreover, the gas-sensitive response values to ammonia showed a good linear relationship with the concentration of ammonia gas. The nanocomposites showed excellent stability in both ammonia and dry-air cycle detection.
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