TITLE:
Influence of Water Ageing on Mechanical Properties of CaCO3 Filler Filled Epoxy Resin and Sansevieria/Carbon Fiber Reinforced Composites
AUTHORS:
Naveed Anjum, Bheemappa Suresha, Somanahally Lingaiah Ajit Prasad
KEYWORDS:
Epoxy, Sria, Nano CaCO3, Sea Water, Mechanical Properties
JOURNAL NAME:
Open Journal of Composite Materials,
Vol.9 No.1,
January
18,
2019
ABSTRACT: The present paper studies water absorption behavior and its consequence on
mechanical properties of untreated and chemically treated Sansevieria /carbon
fiber reinforced hybrid epoxy (Sria/CF-Ep) composite with calcium carbonate
(CaCO3) nanoparticles. Sansevieria /carbon fiber (30/5 wt%) reinforced hybrid
epoxy composite with 1.5, 3 and 4.5 wt% of CaCO3 have been developed
by hand lay-up method followed by heat press. The water absorption characteristics
of the Sria fibers were obtained by immersing the composite samples
in sea water at room temperature, until reaching their water content saturation
level. The dry and water-immersed hybrid composite samples were subjected
to hardness, interlaminar shear, tensile, flexural, and impact tests.
The water absorption development of hybrid composites was found to follow
Fickian diffusion behavior. Diffusion coefficients and maximum water uptake
results were evaluated; the outcome showed that both increased with an increase
in filler loading to study the consequence of water penetration in the
fiber/matrix interface. The study shows that the mechanical and water-resistant
properties of the Sria were improved through chemical treatment and hybridization.
Nevertheless, as a result of water penetrating the fiber/matrix interface,
longer water-immersion times reduced the tensile and flexural strength
of the composites.