Affiliation:
1. State Key Laboratory of Reliability and Intelligence Electrical Equipment, School of Mechanical Engineering, National Engineering Research Center for Technological Innovation Method and Tool, Hebei University of Technology, Tianjin 300130, China
2. Department of Mechanical & Electronic Engineering, Sichuan Engineering Technical College, Deyang 618000, China
3. Xinjiang Tianfu Energy Co., Ltd., Shihezi 832000, China
4. World Transmission Technology (Tianjin) Co., Ltd., Tianjin 300409, China
Abstract
The composites with multiple types of nano-carbon fillers have better electrical conductivity and piezoresistive properties as compared with composites with a single type of nano-carbon fillers. As previously reported, the nano-carbon fillers with various aspect ratios, such as carbon nanotube (CNT) and carbon black (CB), have synergistic enhanced effects on the piezoresistive performance of composite sensors. However, most of the works that have been reported are experimental investigations. The efficient and usable numerical simulation investigation needs to be further developed. In this study, based on an integrated 3D statistical resistor network model, a numerical simulation model was created to calculate the piezoresistive behavior of the CNT/CB/ Polyvinylidene Fluoride (PVDF) composite. This model also takes into account the tunneling effect between nearby nano-fillers. It is found from numerical simulation results that the piezoresistive sensitivity of composite simulation cells can be influenced by the fraction of CNT and CB. In the case that the CNT content is 0.073 wt.%, the best force-electrical piezoresistive sensitivity can be achieved when the CB loading is up to 0.2 wt.%. To verify the validity of the simulation model, the previous experimental investigation results are also compared. The experimental results confirm the validity of the model. The investigation is valuable and can be utilized to design a strain sensor for this nano-composite with increased sensitivity.
Funder
Chinese National Natural Science Fund
Key Project of Natural Science Foundation of CQ CSTC
Xinjiang Production and Construction Corps Regional Innovation guidance Program
Key Program for International Science and Technology Cooperation Projects of the Ministry of Science and Technology of China
National Science and Technology Major Project
Science and Technology Planning Project of Tianjin
Key Program of Research and Development of Hebei Province
Fund for Innovative Research Groups of Natural Science Foundation of Hebei Province
China Postdoctoral Science Foundation
Natural Science Foundation of Hebei Province of China
High-level Talents Funding Project of Hebei Province
Science and Technology Project of Hebei Education Department
cientific Research Planning Project of the Education Commission of Tianjin
Key Project of Natural Science Foundation of Tianjin
Opening Project of Key Laboratory of Testing Technology for Manufacturing Process
Subject
General Materials Science