Abstract
Thermo-mechanically durable industrial polymer nanocomposites have great demand as structural components. In this work, highly competent filler design is processed via nano-modified of micronic SiO2/Al2O3 particulate ceramics and studied its influence on the rheology, glass transition temperature, composite microstructure, thermal conductivity, mechanical strength, micro hardness, and tribology properties. Composites were fabricated with different proportions of nano-modified micro-composite fillers in epoxy matrix at as much possible filler loadings. Results revealed that nano-modified SiO2/Al2O3 micro-composite fillers enhanced inter-particle network and offer benefits like homogeneous microstructures and increased thermal conductivity. Epoxy composites attained thermal conductivity of 0.8 W/mK at 46% filler loading. Mechanical strength and bulk hardness were reached to higher values on the incorporation of nano-modified fillers. Tribology study revealed an increased specific wear rate and decreased friction coefficient in such fillers. The study is significant in a way that the design of nano-modified mixed-matrix micro-composite fillers are effective where a high loading is much easier, which is critical for achieving desired thermal and mechanical properties for any engineering applications. Copyright © 2016 John Wiley & Sons, Ltd.
Highlights
Nanocomposite design is a successful approach followed for the fabrication of thermo-mechanically reliable structural components for engineering applications
Epoxy composites were fabricated with mixed-matrix SiO2/Al2O3 micro-composite ceramic fillers modified with nanophasic SiO2 and Al2O3
A systematic and comparative study was conducted on nano-modification over mixed-matrix microcomposite ceramic fillers to probe the competitive, beneficial properties upon micro-structures, glass transition temperatures, thermal conductivity, strength, and tribology properties
Summary
Nanocomposite design is a successful approach followed for the fabrication of thermo-mechanically reliable structural components for engineering applications. When they were used to modify the micronic fillers, the mixed-matrix micro ceramic composite filler is capable to retain the Tg value on par with neat epoxy. Effect of mixed-ceramic micro-composite fillers with and without nano-modification on the thermal conductivity of epoxy composites.
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