Assessing the Influence of the Sourcing Voltage on Polyaniline Composites for Stress Sensing Applications

Polymers

AndrésFelipe Cruz-Pacheco¹  JairoAlberto Gómez-Cuaspud¹  CarlosR. Batista-Rodríguez²  Leonel Paredes-Madrid²  CarlosAndrésPalacio Gómez³  Jahir Orozco⁴ 

[1] Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia;Faculty of Mechanic, Electronic and Biomedical Engineering, Universidad Antonio Nariño, Tunja 150002, Colombia;Faculty of Sciences, Universidad Antonio Nariño, Tunja 150002, Colombia;Max Planck Tandem Group in Nanobioengineering, University of Antioquia. Complejo Ruta N, Calle 67 No. 52–20, Medellín 050010, Colombia;

关键词: polyaniline;    polyethylene;    piezoresistive sensor;    pressure sensor;    polymer composite;   

DOI  :  10.3390/polym12051164

来源: DOAJ

【 摘 要 】

Polyaniline (PANI) has recently gained great attention due to its outstanding electrical properties and ease of processability; these characteristics make it ideal for the manufacturing of polymer blends. In this study, the processing and piezoresistive characterization of polymer composites resulting from the blend of PANI with ultra-high molecular weight polyethylene (UHMWPE) in different weight percentages (wt %) is reported. The PANI/UHMWPE composites were uniformly homogenized by mechanical mixing and the pellets were manufactured by compression molding. A total of four pellets were manufactured, with PANI percentages of 20, 25, 30 and 35 wt %. Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to confirm the effective distribution of PANI and UHMWPE particles in the pellets. A piezoresistive characterization was performed on the basis of compressive forces at different voltages; it was found that the error metrics of hysteresis and drift were influenced by the operating voltage. In general, larger voltages lowered the error metrics, but a reduction in sensor sensitivity came along with voltage increments. In an attempt to explain such a phenomenon, the authors developed a microscopic model for the piezoresistive response of PANI composites, aiming towards a broader usage of PANI composites in strain/stress sensing applications as an alternative to carbonaceous materials.

【 授权许可】

Unknown