Carbon nanotube/polypropylene/polycarbonate conductive nanocomposite films: Preparation and characterization

Abstract

In this study, CNT/PP/PC conductive composite films were prepared by compounding PP (polypropylene)/PC (polycarbonate) (1:1) and carbon nanotubes (CNT) using a physical blending and hot pressing method. Next, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and water contact angle measurement are conducted in order to characterize the properties of CNT/PP/PC conductive films. The results showed there is no chemical reaction inside the PP/PC composite film with the addition of CNT. Neither the CNT composite film containing 3 wt% nor the control film decomposed thermally within 220°C. The water contact angle increased from 88.5° for the control film to 110.99° for the composite film containing 3 wt% CNT. This indicates that the film has good thermal stability and hydrophobic properties. The percolation threshold was obtained when the content of CNT was 3 wt%, and the best conductivity of the CNT/PP/PC composite film was 5.53 S/m at this time. In order to improve the tensile properties of the film, a small amount of polyurethane (TPU) was added to the film, and the maximum tensile strength was 24.91 Mpa when the content of TPU was 6.7%. This study can provide a strategy for the practical application of flexible electronic devices.

Preparation of flexible highly conductive polyurethane elastomers with low PEDOT:PSS content based on novel feasible pore collapse strategy for flexible conductor

“…The polymer matrix ensures the exibility and tensile properties of the CPCs, while the conductive ller achieves electrical conductivity by forming a continuous conductive network in the matrix. At present, most of CPCs are prepared via blending or surface deposition [9][10][11][12][13][14][15][16]. Blending (including solution blending and melt blending) is a commonly used method for CPCs.…”

“…Among them, the TPU/MWCNT composite containing 5.0 wt% showed higher electrical conductivity (133.1 S/m). Li et al [15] prepared CNT/polypropylene (PP)/polycarbonate (PC) conductive composites by mixing PP/PC (1:1) with CNT using physical blending and hot pressing. When CNT content was 3 wt%, the CNT/PP/PC composite lms had the best conductivity (5.53 S/m).…”