TY - JOUR
T1 - Boosting the electrical and mechanical properties of structural dielectric capacitor composites via gold nanoparticle doping
AU - Chan, Kit Ying
AU - Yang, Dan
AU - Demir, Baris
AU - Mouritz, Adrian P.
AU - Lin, Han
AU - Jia, Baohua
AU - Lau, Kin Tak
N1 - Funding Information:
This project is supported by a Swinburne University of Technology research grant (SUPRA) . The authors acknowledge the technical assistance provided by the RMIT Microscopy & Microanalysis Research Facility. B.J. thanks the Australia Research Council through the Discovery Project scheme ( DP190103186 ) and the Industrial Transformation Training Centres scheme (Grant No. IC180100005 ). Appendix A
Funding Information:
This project is supported by a Swinburne University of Technology research grant (SUPRA). The authors acknowledge the technical assistance provided by the RMIT Microscopy & Microanalysis Research Facility. B.J. thanks the Australia Research Council through the Discovery Project scheme (DP190103186) and the Industrial Transformation Training Centres scheme (Grant No. IC180100005).
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Structural dielectric capacitors (SDCs) are load-bearing multifunctional materials that uniquely combine high electrical energy storage capacity with high mechanical properties. The development of electrically conductive carbon fibre reinforced polymer (CFRP)-based electrodes is a promising approach to create high strength SDCs, although challenges remain due to the low conductivity of epoxy matrix of CFRP. Carbon nanotubes and graphene nanoplatelets are commonly used as conductive fillers to produce electrically conductive polymers. However, the electrical conductivity of composites is restricted by the maximum filler content, which is essential to retain composite structures. In this work, gold nanoparticles (AuNPs) with high electrical conductivity were added in different weight fractions (up to 1 wt%) into the epoxy matrix of CFRP electrodes used in graphene oxide-bearing SDCs (GO/SDCs). The electrical conductivity of AuNP-modified CFRP electrodes was 15–250% higher than the unmodified CFRP electrode, depending on the concentration of nanoparticles. As a result, both specific capacitance and energy storage density of AuNPs-modified GO/SDCs were higher (up to ~170% and ~50%, respectively) than the unmodified GO/SDC. Furthermore, AuNP-modified GO/SDCs had higher tensile and interlaminar shear properties. This research provides new insights into improving both the electrical and mechanical properties of SDCs using AuNPs.
AB - Structural dielectric capacitors (SDCs) are load-bearing multifunctional materials that uniquely combine high electrical energy storage capacity with high mechanical properties. The development of electrically conductive carbon fibre reinforced polymer (CFRP)-based electrodes is a promising approach to create high strength SDCs, although challenges remain due to the low conductivity of epoxy matrix of CFRP. Carbon nanotubes and graphene nanoplatelets are commonly used as conductive fillers to produce electrically conductive polymers. However, the electrical conductivity of composites is restricted by the maximum filler content, which is essential to retain composite structures. In this work, gold nanoparticles (AuNPs) with high electrical conductivity were added in different weight fractions (up to 1 wt%) into the epoxy matrix of CFRP electrodes used in graphene oxide-bearing SDCs (GO/SDCs). The electrical conductivity of AuNP-modified CFRP electrodes was 15–250% higher than the unmodified CFRP electrode, depending on the concentration of nanoparticles. As a result, both specific capacitance and energy storage density of AuNPs-modified GO/SDCs were higher (up to ~170% and ~50%, respectively) than the unmodified GO/SDC. Furthermore, AuNP-modified GO/SDCs had higher tensile and interlaminar shear properties. This research provides new insights into improving both the electrical and mechanical properties of SDCs using AuNPs.
KW - Electrical properties
KW - Mechanical properties
KW - Microstructures
KW - Particle reinforcement
UR - http://www.scopus.com/inward/record.url?scp=85072704342&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2019.107480
DO - 10.1016/j.compositesb.2019.107480
M3 - Journal article
AN - SCOPUS:85072704342
SN - 1359-8368
VL - 178
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 107480
ER -