Gupta, Tejendra K. and Singh, Bhanu P. and Tripathi, Ravi Kant and Dhakate, Sanjay R. and Singh, Vidya N. and Panwar, O. S. and Mathur, Rakesh B. (2015) Superior nano-mechanical properties of reduced graphene oxide reinforced polyurethane composites. RSC Advances, 5 (22). pp. 16921-16930. ISSN 2046-2069

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Polyurethane (PU) based composites were prepared by solvent casting techniques using different wt% (0-5 wt%) of reduced graphene oxide (RGO) as reinforcement. A nanoindentation study has been carried out on these composite sheets in order to investigate their nano-mechanical properties. Incorporation of different wt% RGO into the PU matrix led to a significant increase in the hardness and elastic modulus of the composites. The maximum nanoindentation hardness of 140 MPa for 5.0 wt% RGO loading was observed as compared to 58.5 MPa for pure PU (an overall improvement of 139%). The nanoindentation elastic modulus for the 5.0 wt% RGO loaded sample was 881.7 MPa as compared to 385.7 MPa for pure PU (an overall improvement of 129%). The enhancement in the nano-mechanical properties was correlated with spectroscopic and microscopic investigations using Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Due to their excellent nanomechanical properties, these composites find usefulness in structural applications such as the automobile and wind mill blade industries. These composites can also be used in hard and scratch-less coatings on automotive vehicles. The experimental results were in good agreement with theoretical predictions.

Item Type: Article
Subjects: Chemistry
Depositing User: Dr. Rajpal Walke
Date Deposited: 21 Oct 2016 05:26
Last Modified: 21 Oct 2016 05:26

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