Manuel George

@mangalam.ac.in

Associate Professor
Mangalam college of Engineering



                    

https://researchid.co/manuelgeorge

Area of interest includes mechanical, thermal, tribological properties of graphene-based polymer composites. Currently working as Asst Prof in Mangalam college of engg. Since August 2021.

EDUCATION

• PhD in polymer nanocomposites
• M.Tech in Machine Design
• B.Tech in Mechanical Engg.

RESEARCH INTERESTS

composite materials

10

Scopus Publications

39

Scholar Citations

4

Scholar h-index

1

Scholar i10-index

Scopus Publications

  • Mechanical, tribological and modal characteristics of eco-friendly coir/sugarcane fillers reinforced polymer composites
    A N Shankar, Manuel George, S M Murali Krishna, Ismail Kakaravada, Ajay K S Singholi, V V K Lakshmi, Mathews Chacko, Arun Kumar K, Prakhar Jindal, and Rajeshkumar Selvaraj
    IOP Publishing
    Abstract Polymer-based composites have been drawing the attention of the research community for many decades, not only in academia but also in industry. However, continuously increasing environmental concerns have led the researchers to focus on natural composite materials. This is a challenge for researchers to develop a natural composite without compromising the composites’ excellent mechanical properties and tribological performance. In this research, coir and sugarcane are selected as the natural fillers, and epoxy resin has been chosen for matrix material. To look into the crystallinity of composites, XRD analysis was done. In addition, a mechanical study was done to look at the manufactured composites’ tensile and flexural characteristics. The tribological performance (i.e., wear rate and friction coefficient) of the composite samples is investigated by using a pin-on-disc setup. The parameters such as filler loading and normal load affecting the tribological performance of epoxy-based natural composites are studied. The results show that the wear and friction characteristics of the composite reinforced with sugarcane and coir were 10.78% and 57.80% lower than those of the neat composite, respectively.

  • Buckling, bending and dynamic analyses of laminated three-phase polymer/graphene/carbon fiber composite rectangular plates
    Yang Hao, Manuel George, Rajeshkumar Selvaraj, Kundan Meshram, Amal M. Al-Mohaimeed, Rey Y. Capangpangan, Arnold C. Alguno, and Mohammed Al-Bahrani
    Elsevier BV

  • Enhancement of vibrational characteristics of rotating CFRP composite tapered plates reinforced by graphene nanoparticles
    Manuel George, Mattipally Prasad, Rajeshkumar Selvaraj, N. Sakthieswaran, J. Sivakumar, Amal M. Al‐Mohaimeed, Tse‐Wei Chen, Mohammed Al‐Bahrani, Rey Y. Capangpangan, and Arnold C. Alguno
    Wiley
    AbstractIn the present study, the dynamic behavior of rotating carbon fiber reinforced polymer (CFRP) composite tapered plates reinforced with graphene nanoparticles has been investigated using a finite element (FE) formulation. The mechanical properties of CFRP laminates containing 0–0.5 wt% graphene nanoparticles were assessed using ASTM standard tests. The experimental dynamic analysis was conducted on CFRP and graphene reinforced CFRP composites under cantilever end conditions. The first‐order shear deformation theory (FSDT)‐based FE model was developed using MATLAB software to obtain the natural frequencies of the graphene reinforced CFRP plates. The validity of the FE results is compared with literature, and it shows excellent agreement for composite structures. Furthermore, parametric analysis is performed to explore the influence of wt% of graphene, rotating speed, setting angle, and ply thickness on the dynamic responses of graphene reinforced CFRP tapered plates.Highlights Effects of graphene reinforcement in CFRP composites are investigated. The mechanical characteristics were evaluated using ASTM standards. FSDT is employed to model the rotating tapered graphene‐CFRP plates. Vibration behavior of graphene‐CFRP composites is studied experimentally. Effects of various factors on the vibrations of the CFRP plates are studied.


  • Experimental Investigation of the Hydrophobic and Modal Properties of Epoxy Nanocomposites Reinforced with Graphene Nanofillers
    A. N. Shankar, Mattipally Prasad, Rajeshkumar Selvaraj, Manuel George, Akash Mohanty, and J. Sivakumar
    Springer Science and Business Media LLC

  • Thermal and magnetic properties study of NiCo<inf>2</inf>O<inf>4</inf>/graphene and NiFe<inf>2</inf>O<inf>4</inf>/graphene
    Manuel George, K. Pratheesh, Akash Mohanty, Nakul Suresh, Tijo Varghese, Richard Sunny, and S. Narayanan
    Elsevier BV



  • Study on the thermal, dielectric, and dynamic mechanical properties of graphene decorated with graphene quantum dots (GDGQD) reinforced epoxy nanocomposites
    Manuel George and Akash Mohanty
    IOP Publishing
    In this paper, the thermal conductivity, dielectric properties and dynamic mechanical properties were studied for Graphene Decorated with Graphene Quantum Dots (GDGQD)-epoxy nanocomposites. A maximum thermal conductivity enhancement of 19% registered for 0.75 wt% GDGQD sample where a low acoustic impedance mismatch between the interface of GDGQD fillers and the epoxy matrix occur and a dielectric constant increase of 6% due to the better charge accumulation at the conductive filler/ insulating polymer interface of the composite. Further DMA is performed using the cantilever mode. The loss modulus peak obtained for 0.75 wt% GDGQD-epoxy sample given a maximum value due to the interface interaction and the corresponding storage modulus shown a maximum increment of 21%, due to the molecular dynamics and cross-linking density of the epoxy matrix with GDGQD. The thermal stability of the samples evaluated using Thermal Gravimetric Analysis (TGA) shown an improvement in glass transition temperature (Tg) of nanocomposite for 0.75 wt% GDGQD by 11 °C where a greater dispersion of the fillers and efficient functional groups interaction are responsible factors.

  • Wear and hardness studies of graphene decorated with graphene quantum dots (G-D-GQD) embedded epoxy nano composites
    Manuel George and Akash Mohanty
    Informatics Publishing Limited
    The paper discusses about the wear and micro hardness behavior of Graphene Decorated with Graphene Quantum Dots (G-D-GQD) reinforced epoxy composites. The samples were prepared by open mold casting method by adding 0.25–1 wt. % (in an interval of 0.25%) of GDGQD and evaluated on a reciprocating wear tester configuration for wear and coefficient of friction properties. The micro-hardness testing of the G-D-GQD particles embedded epoxy composites has been performed and the hardness value results were compared with neat epoxy to find the improvement in hardness. Significant improvements in the hardness and wear resistance of the epoxy nanocomposites was obtained by the embedding of G-DGQD fillers, which is due to the efficient bonding of GDGQD filler with the epoxy matrix. Scanning Electron Microscope (SEM) images of the worn composites were analysed to get an insight into the morphology of the surfaces. Furthermore, the coefficient of friction of the composites got increased with the wt. % of fillers in the base material, but due to the superior bond strength and lesser agglomeration of the particles, the Vicker's hardness improved and the wear loss reduced. Hence the surface area coverage of G-D-GQDs got a significant role in the reduced wear loss and thereby coming to a threshold value. The study concludes by suggesting that 0.25 wt. % GDGQD/epoxy composites shown a least wear rate and increased hardness of 0.023% and 26%, respectively thereby suggesting application involving reduced wear rates.

RECENT SCHOLAR PUBLICATIONS

  • Mechanical, tribological and modal characteristics of eco-friendly coir/sugarcane fillers reinforced polymer composites
    AN Shankar, M George, SMM Krishna, I Kakaravada, AKS Singholi, ...
    Materials Research Express 11 (10), 105511 2024

  • Experimental Investigation of the Hydrophobic and Modal Properties of Epoxy Nanocomposites Reinforced with Graphene Nanofillers
    AMJS A. N. Shankar, Mattipally Prasad, Rajeshkumar Selvaraj, Manuel George
    Transactions of the Indian Institute of Metals 2023

  • Thermal and magnetic properties study of NiCo2O4/graphene and NiFe2O4/graphene
    SN Manuel George, K.Pratheesh, Akash Mohanty, Nakul Suresh,Tijo Varghese ...
    Materials Today Proceedings 2022

  • ELASTIC PROPERTY EVALUATION OF FIBRE REINFORCED GEOPOLYMER COMPOSITE USING SUGARCANE BAGASSE FIBRE
    M George
     2022

  • Viscoelastic and mechanical characterization of graphene decorated with graphene quantum dots reinforced epoxy composites
    M George, A Mohanty
    Polymer Engineering & Science 60 (12), 3011-3023 2020

  • Investigation of mechanical properties of graphene decorated with graphene quantum dot‐reinforced epoxy nanocomposite
    M George, A Mohanty
    Journal of Applied Polymer Science 137 (19), 48680 2020

  • Study on the thermal, dielectric, and dynamic mechanical properties of graphene decorated with graphene quantum dots (GDGQD) reinforced epoxy nanocomposites
    M George, A Mohanty
    Materials Research Express 6 (12), 125336 2019

  • Wear and Hardness Studies of Graphene Decorated with Graphene Quantum Dots (G-D-GQD) Embedded Epoxy Nano Composites
    MGA Mohanty
    J. Surface Sci. Technol. 35 (35(1–2),), 45-53 2019

  • Effect of Flexible Wall Boundary in Seismic Design of Liquid Storage Tanks with Fluid Structure Interaction
    M George, A Rajan
    Int. J. Eng. Res, V4 2015

MOST CITED SCHOLAR PUBLICATIONS

  • Investigation of mechanical properties of graphene decorated with graphene quantum dot‐reinforced epoxy nanocomposite
    M George, A Mohanty
    Journal of Applied Polymer Science 137 (19), 48680 2020
    Citations: 24

  • Experimental Investigation of the Hydrophobic and Modal Properties of Epoxy Nanocomposites Reinforced with Graphene Nanofillers
    AMJS A. N. Shankar, Mattipally Prasad, Rajeshkumar Selvaraj, Manuel George
    Transactions of the Indian Institute of Metals 2023
    Citations: 5

  • Viscoelastic and mechanical characterization of graphene decorated with graphene quantum dots reinforced epoxy composites
    M George, A Mohanty
    Polymer Engineering & Science 60 (12), 3011-3023 2020
    Citations: 4

  • Study on the thermal, dielectric, and dynamic mechanical properties of graphene decorated with graphene quantum dots (GDGQD) reinforced epoxy nanocomposites
    M George, A Mohanty
    Materials Research Express 6 (12), 125336 2019
    Citations: 4

  • Wear and Hardness Studies of Graphene Decorated with Graphene Quantum Dots (G-D-GQD) Embedded Epoxy Nano Composites
    MGA Mohanty
    J. Surface Sci. Technol. 35 (35(1–2),), 45-53 2019
    Citations: 1

  • Effect of Flexible Wall Boundary in Seismic Design of Liquid Storage Tanks with Fluid Structure Interaction
    M George, A Rajan
    Int. J. Eng. Res, V4 2015
    Citations: 1

GRANT DETAILS

Synthesis of Graphite nanoplatelets decorated with spinel ferrite materials by using various surfactants on CF/GF composites for EMI shielding.
Funding Agency : DST-SERB,
Ongoing, Principle Investigator, Fund- 595000,
2023 - 2027