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Influence of seawater absorption on retention of mechanical properties of nano-TiO2 embedded glass fiber reinforced epoxy polymer matrix composites

Nayak R. K., Ray B. C.

Archives of Civil and Mechanical Engineering

2018

Vol. 18, no. 4

1597--1607

Nano-fillers are embedded with epoxy polymer matrix of glass fiber reinforced polymer (GFRP) composites to enhance the mechanical properties. In the present investigation, the nano-TiO2 particles of different concentrations was mixed with the epoxy polymer matrix to improve the mechanical properties. GFRP nano-composites fabricated by hand lay-up method and subsequently immersed in a seawater bath at 70 °C for 40 days. The seawater diffusivity, flexural, and interlaminar shear strength of the composites were evaluated and compared between themselves. The result revealed that with the addition of 0.1 wt.% of the nano-TiO2 particles into the epoxy polymer matrix, seawater diffusivity improved by 15%. However, flexural and interlaminar shear strength of seawater aged nanocomposites is increased by 15% and 23% respectively. The fractured surface of the broken samples has been analyzed through field emission scanning electron microscope (FESEM) to establish the structure–property co-relationship.