title: Sensitivity of Dielectric Properties to Wear Process on Carbon Nanofiber/High-Density Polyethylene Composites.
abstract: We examined the correlation of wear effects with dielectric properties of carbon nanofibers (CNFs; untreated and organosilane-treated)-reinforced high-density polyethylene (HDPE) composites. Wear testing for the nanocomposites over up to 120 h was carried out, and then, dielectric permittivity and dielectric loss factor of the polymer composites with the increased wear time were studied. Scanning electron microscope and optical microscope observations were made to analyze the microstructure features of the nanocomposites. The results reveal that there exist approximate linear relationships of permittivity with wear coefficient for the nanocomposites. Composites containing silanized CNFs with the sufficiently thick coating exhibited high wear resistance. The change in permittivity was more sensitive to the increased wear coefficient for the nanocomposites with lower wear resistance. This work provides potential for further research on the application of dielectric signals to detect the effects of wear process on lifetime of polymeric materials.
authors: School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA.
authors: Tian
authors: T
authors: Liu
authors: School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA.
authors: Weston
authors: W
authors: Wood
authors: School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA. katie_zhong@wsu.edu.
authors: Wei-Hong
authors: WH
authors: Zhong
keywords: Carbon nanofiber; Dielectric loss; Nanocomposite; Permittivity; Polyethylene; Wear resistance