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This paper investigates the tribological properties of MWCNT/Graphene (GnP)/ Nanodiamond (NDs) reinforced hybrid epoxy composites. In this paper, the hardness, surface roughness and wear properties of epoxy with MWCNT/NDs, Graphene/NDs, and MWCNT/ Graphene reinforced epoxy composites have been investigated using a Vicker hardness tester, surface roughness tester and reciprocating wear tester respectively. Hardness evaluated using the diagonal length (Hv, l) and by the indentation depth (Hv, d) of thermoset polymers, epoxy resin, was carried out. In addition filler, very much enhances the wear properties of the epoxy resin, by reducing the friction coefficient and wear rate. The result of different fillers on the tribological behaviour of an epoxy has been studied using untreated MWCNT, Graphene, NDs and mixture of MWCNT/NDs, Graphene/NDs and MWCNT/Graphene. Addition of filler greatly enhances the tribological properties of epoxy resin.

Keywords

Epoxy, Graphene (GnP), MWCNTs, Nano-Diamond (NDs).

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Compressive Strength Evaluation of Nanodiamond/ MWCNT/Graphene Reinforced Novel Hybrid Polymer Nano Composites

Abstract Views :214 | PDF Views:1

Authors

Baljit Singh ¹, Akash Mohanty ¹

Affiliations
1 School of Mechanical Engineering, Vellore Institute of Technology, Vellore - 632014, Tamil Nadu, IN

Source

Journal of Surface Science and Technology, Vol 36, No 1-2 (2020), Pagination: 75–81

Abstract

Because of the inherent brittleness property of monolithic epoxy, it fails to prevent crack propagation and is hence vulnerable to the catastrophic failure. Nano-fillers, such as CNT/Graphene (GnP)/Nanodiamond (NDs) and other carbonaceous materials increase its ability to withstand crack propagation thus its fracture strength propitiously improved. This paper studies compressive properties of MWCNT/GnP/NDs on epoxy based composite material. A static uniaxial compression test was conducted in order to study the effect of these fillers on the compressive stress-strain behaviour of such composites. In this study, the MWCNT/GnP/NDs are added individually as 0.2 wt% and for the hybrid composite, 0.1 wt. % of NDs is added separately along with 0.1 wt% of MWCNT and GnP to the epoxy matrix. The bonding between MWCNT/GnP/NDs with the epoxy matrix is confirmed by microscopic observations. The results showed that the individual addition of 0.2 wt% of MWCNT/GnP/NDs, improves the compressive strength whereas the hybrid composite produced a declining trend. The reverse trend was also observed for the modulus value of the above mentioned composite materials.

Keywords

Epoxy, Graphene (GnP), MWCNT, Nanodiamond (NDs).

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Study of Water Absorption Properties of Annealed Nanodiamond/Epoxy Nanocomposites

Abstract Views :160 | PDF Views:0

Authors

Baljit Singh ¹, Akash Mohanty ²

Affiliations
1 School of Mechanical Engineering, Vellore Institute of Technology, Vellore – 632014, Tamil Nadu, NI
2 School of Mechanical Engineering, Vellore Institute of Technology, Vellore – 632014, Tamil Nadu, IN

Source

Journal of Surface Science and Technology, Vol 37, No 1-2 (2021), Pagination: 15-21

Abstract

Water absorption behavior of annealed Nanodiamond (ND) particle filled epoxy composite, has been studied. Removal of impurity present in the pristine ND and its surface modifications, were carried out by heat treatment. Different weight percent of ND (0.1, 0.3 and .05 wt. %) were incorporated in a commercial grade epoxy resin (L-12) in a controlled manner. A good and homogeneous distribution of ND in the composite, was observed. This resulted in reduction of mobility of the epoxy chain due to formation of highly immobile mono-layers around ND as well as formation of hydrogen bond between the ND and the epoxy. The water absorption and the contact angle properties of the resulting composites are measured. The results indicate that the water absorption as well as contact angle of the composite decrease with the increase of incorporated ND. It is observed that incorporation of ND into epoxy matrix, enhances the water resistance property of the composite.

Keywords

Epoxy, Nanodiamond, SEM.

Full Text

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