This research explains the melt spinning of bicomponent fibers, consisting of a conductive polypropylene (PP) core and a piezoelectric sheath (polyvinylidene fluoride). Previously analyzed piezoelectric capabilities of polyvinylidene fluoride (PVDF) are to be exploited in sensor filaments. The PP compound contains a 10 wt % carbon nanotubes (CNTs) and 2 wt % sodium stearate (NaSt). The sodium s...

a State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China b State Key Joint Laboratory of Environment Simulation and Pollution Control, POPs Research Center, School of Environment, Tsinghua University, Beijing 100084, China c School of Environmental and Chemical Engineering, Nancha...

Herein we report the design and synthesis of fluorine-doped, carbon-encapsulated hollow Fe3O4 spheres (h-Fe3O4@C/F) through mild heating of polyvinylidene fluoride (PVDF)-coated hollow Fe3O4 spheres. The spheres exhibit enhanced cyclic and rate performances. The as-prepared h-Fe3O4@C/F shows significantly improved electrochemical performance, with high reversible capacities of over 930 mA h g(-...

laminates by exploiting the flux concentration effect Z. Fang, S. G. Lu, F. Li, S. Datta, Q. M. Zhang, and M. El Tahchi Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA LPA-GBMI, Faculty of Sciences II, Department of Physics, ...

INTRODUCTION AND HYPOTHESIS Complications and malfunctioning after TOT can occur due to several factors, such as the material of the sling. The aim of the present study is to evaluate morphology and functionality of two types of slings (PVDF; polypropylene) in vivo using perineal ultrasound (PUS). MATERIALS In n = 47 women with TOT four criteria for PUS were taken and checked for possible dif...

Light is a readily available and sustainable energy source. Transduction of light into mechanical work or electricity in functional materials, composites, or systems has other potential advantages derived from the ability to remotely, spatially, and temporally control triggering by light. Toward this end, this work examines photoinduced piezoelectric (photopiezoelectric) effects in laminate com...

We propose a system for measuring entropy 1 variations, S, in thermal systems using pyroelectric sensors. 2 These sensors convert time-dependent temperature variations 3 into electrical current. Consequently, heat and temperature 4 variations are obtained, and sensor entropy is inferred. Various 5 polyvinylidene fluoride and lead zirconate titanate sensors have 6 been tested. Two types of measu...

For forty years researchers on ferroelectric switching have used the Kay-Dunn theory to model the thickness-dependence of the coercive field; it works surprisingly well, despite the fact that it is based upon homogeneous nucle-ation and a small-field expansion, neither of which is realized in thin films. Here we demonstrate that this result can be obtained from a more general Kolmogorov-Avrami ...

This paper deals with development of compliant artificial finger skin surface ridges with a pair of PVDF film strips embedded in each of them as sensing transducers for incipient slip detection in pursuit of elucidating the mechanism of human static friction sensing. We describe design and manufacture of the surface ridges and distinctive detection of incipient slip from rolling.

This paper aims at developing a force-guided microassembly technology with in-situ flexible polyvinylidene fluoride (PVDF) beam force sensing and hybrid force/position control based on an infinite dimensional model of the flexible sensor structure. Besides the designed 1-D PVDF cantilever based microforce sensor, as the soft sensor structure itself is installed at the free end of micromanipulat...