Melt compounded polylactic acid-hexagonal boron nitride-aluminum oxide hybrid composites for electronic applications: impact of hybrid fillers on thermophysical, dielectric, optical, and hardness properties
J. Vishnu Chandar, D. Mutharasu, Khairudin Mohamed, K. I. K. Marsilla, S. Shanmugan, Azlan Abdul Aziz
Abstract
The dielectric, thermophysical, optical, and hardness of pure polylactic acid (PLA) and hBN micropowder and Al2O3 nanopowder (1% to 30%) reinforced PLA hybrid composites were investigated. Hybrid composites exhibit improved thermal conductivity (k – 0.54 W/mK), permittivity (ɛꞌ – 4.6720 @ 1 MHz to 1 GHz) with very low loss tangent (tan δ < 0.02). High absorption in UV region was observed for all hybrid composites. Overall, the prepared hybrid composites can be used as a bio-based dielectric substrates, enclosures, thermal interface material for low temperature applications and UV-absorbable coating materials for fabric, packaging, and storage applications.