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Research Article Open Access

Development of SiO2-epoxy Nanocomposites and their Thermo-mechanical Properties

 

Bandana Rajpoot1Sushil Kumar Singh1,2, Abhishek Kumar1*, Anuj Jain1

 

1Applied Mechanics Department, Motilal Nehru National Institute of Technology Allahabad, 211004, India
2Mechanical Engineering Department, G H Raisoni College of Engineering Nagpur, 440016, India

Adv. Mater. Proc., 2020, 5 (2), 20020401

DOI: 10.5185/amp.2020.020401

Publication Date (Web):05 April 2020

Copyright © IAAM-VBRI Press

Abstract


This study is focused to see reinforcing effects of SiO2 nanoparticles on the mechanical and thermal properties of epoxy resin. For the same, SiO2 nanoparticles up to 8 wt.% were reinforced in epoxy resin and the effect of this reinforcement was seen on fracture toughness, fracture energy and glass transition temperature. The particles were dispersed ultrasonically in epoxy resin, which gives well dispersion of nano-SiO2 particles. A good dispersion of silica nanoparticles enhances mechanical and thermal properties up to 4 wt.% SiO2. As a result, the value of fracture toughness increases from 1.10 to 2.90 M Pa.m1/2, fracture energy increases from 2.66 to 11.50 kJ/m2 and glass transition temperature increased about 9°C for the epoxy containing 4 wt.% SiO2 nanoparticles. With further particle loading in epoxy reflected decrease in mechanical and thermal properties, which is attributed to the significant increase in clustering of the nanoparticles at higher loading concentrations.

Keywords


Silica nanoparticles, epoxy, ultrasonic mixing, nanocomposites, mechanical and thermal properties.