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
19
Scopus Publications
54
Scholar Citations
4
Scholar h-index
1
Scholar i10-index
Scopus Publications
Carbonaceous filler and fiber hybridization for enhanced mechanical, thermal, and electrical properties of polymer composites: a review Sathiyamoorthy Margabandu, Vinothkumar Harikrishnan, Manuel George, S Sathiyamurthy, M Jahnavi, E Hemadharshini, B Shrilakshmi Journal of Engineering and Applied Science, 2026 This review critically examines the impact of carbonaceous nanofillers and fiber hybridization on the mechanical, thermal, and electrical characteristics of polymer composites. Advanced nanofillers such as graphene, carbon nanotubes, and carbon black are assessed for their potential to improve strength, conductivity, and thermal stability. Micro and macro-scale fibers (including carbon, glass, Kevlar, and natural fibers) are examined in hybrid configurations with thermoplastic and thermoset polymer matrices. Literature published between 2000 and 2025 was identified through a structured literature search of Scopus, Web of Science, and Google Scholar and synthesized to elucidate comparative performance trends. The review highlights dispersion strategies, interfacial engineering, and surface modification techniques that influence filler-matrix and fiber-matrix interactions, particularly emphasizing synergistic reinforcement mechanisms such as multi-scale interactions via crack-bridging by fibers and crack-deflection by nanofillers, along with the essential function of the interphase region in effective load transfer. Comparative analyses across reported studies demonstrate substantial improvements in tensile strength, flexural modulus, and thermal and electrical conductivity, often exceeding predictions based on the rule of mixtures. However, challenges remain in controlling nanofiller dispersion, maintaining strong interfacial compatibility, achieving effective hybridization, balancing multifunctional properties without performance trade-offs, ensuring scalable processing, and improving recyclability. The review integrates mechanistic insights and design methods to enlighten the development of high-performance, multifunctional polymer composites for aerospace, automotive, electronics, and construction applications.
Examining several aspects of reinforced coir, sugarcane, and glass fiber hybrid composites with CoFe2O4 and NiFe2O4 fillers for structural uses Navish Kumar, Manuel George, Abin Paul, Amal R, Rahul Krishnan EPJ Web of Conferences, 2026 The mechanical and dielectric characteristics of coir and sugarcane fibers are investigated in this work using epoxy composites augmented with NiFe and CoFe metallic fillers. The strength, stiffness, and deformation behavior of four distinct compositions—C1-Coir with NiFe, C2-Coir with CoFe, S1-Sugarcane with NiFe, and S2-Sugarcane with CoFe—were assessed using tensile and flexural testing. With C1 showing the maximum strength of 160.215 N/mm² and S1 showing the highest tensile modulus of 2859.09 N/mm², indicating an improvement in stiffness, the results show that coir-based composites have higher tensile strength. These results demonstrate the promise of composites made of sugarcane and coir as sustainable substitutes for structural applications that need to balance stiffness and strength. More charge storage capacity is shown by a higher dielectric constant in CoFe GFRP (~2.03 pF). The Q factor of NiFe GFRP is much greater, at about 13.4. Their performance for industrial applications in lightweight structures and electromagnetic shielding could be improved by further optimizing fiber-metal interactions and resin composition.
Comparative analysis of vibration, flexural, and Impact properties of PLA-ABS composites for structural applications Abin Paul, Santhu Varghese Thomas, Arun Jose, Rabi J, Manuel George EPJ Web of Conferences, 2026 This work investigates the flexural and vibration characteristics of several PLA-ABS composites. Modal analysis was used to determine the intrinsic frequencies and mode forms of different composite constructions, providing information about their dynamic performance. According to the current vibration research, PLA40/ABS60 displayed the highest mode 1 and mode 2 frequencies, indicating higher resistance to secondary vibrations, while PLA60/ABS40 produced an extraordinarily high mode 3 frequency of 928.75 Hz, showing enhanced rigidity. The results show that the resonance peaks shift to higher frequencies when ABS is added, indicating improved damping and stiffness properties. PLA100 and ABS/PLA/ABS composites had the highest maximum stress, indicating greater strength, according to tests of flexural modulus and impact strength. The greatest deflection was displayed by PLA40/ABS60, indicating increased flexibility but decreased strength. In impact tests, PLA50/ABS50 had the best energy absorption and durability with the maximum impact strength of 9757.47 J/m, closely followed by PLA100. Therefore, sandwich configurations like ABS/PLA/ABS enhance vibrational behavior and dynamic performance, whereas PLA/ABS composites with ideal blending ratios strike a balance between strength and flexibility.
Effect of drill bit type on delamination of graphene-reinforced carbon fiber composites along with impact, and damping properties A. N. Shankar, Manuel George, S. M. Murali Krishna, Sushil Chaudhary, Ajay K. Singh Singholi, V. V. K. Lakshmi, Arun Kumar K, Mesfin Kebede Kassa, Rajeshkumar Selvaraj Journal of Industrial Textiles, 2025 This paper focusses on finding the delamination, morphological, impact, and damping behavior of composites reinforced with graphene nanofillers (0, 0.25, 0.5 and 0.75 wt%). Different cutting settings and two distinct drill bits (TiAlN and CTiN) were utilized to assess the effect on the delamination properties. A scanning electron microscope was used to examine the drilled holes. The TiAlN drill bit showed a decrease in the delamination factor (Fd) for entrance and exit, from 1.038,296 to 1.021,103 and 1.069,418 to 1.006,036, respectively, as compared to 0 and 0.75 wt% graphene reinforcement. The TiAlN drill bit produced a mean thrust force of 28.76 N, while the CTiN drill bit produced a mean thrust force of 55.24 N. The composites demonstrated a 56.19% reduction in thrust force when compared to the TiAlN and CTiN drill bits. Furthermore, the impact energy of the composite increased with the addition of graphene, rising from 538.5 to 754.9 J/m, respectively. Additionally, the damping characteristics of the graphene-reinforced composites were investigated and found to have 6.4% higher values than those of the neat composites.
Multifunctional hybrid composite for structural-electromagnetic applications: a comparative study of rGO-ferrite and graphite-ferrite reinforcements in glass fiber/epoxy Nijo Jose, Abin Paul, R. M Sathiyamoorthy, PP George, Manuel George Composite Interfaces, 2025 This study introduces a novel, comprehensive evaluation of hybrid composites built on glass fiber-reinforced epoxy, incorporating ferrite-based hybrid fillers: NiFe2O4/CoFe2O4 dispersed in reduced graphene oxide (rGO), benchmarked against graphite matrices. The ferrites were initially synthesized via chemical solution route, further NiFe2O4/CoFe2O4-rGO was prepared using a solvothermal reduction method. Microstructural analysis confirmed the successful deposition of spinel-structure ferrites on rGO. The rGO-based hybrid composites suggested to be superior multifunctional performance across dielectric, mechanical, and dynamic properties. Dielectric impedance spectroscopy revealed a lower dielectric loss (tandelta < 0.07) and a higher Q factors (>24) for rGO systems, signifying superior dielectric efficiency. While graphite systems showed higher overall electromagnetic interference (EMI) shielding due to absorption, the rGO-ferrite systems maintained low reflection and effective impedance matching across the X-band. Crucially, dynamic analysis and tensile testing confirmed the structural advantages of the rGO hybrids. The rGO composites exhibited improved stiffness and vibration resistance with higher natural frequencies and lower damping. Specifically, CoFe2O4-rGO composites achieved the highest mechanical strength 138.37 MPa and ductility, supported by enhanced interfacial adhesion shown in SEM fractography. These findings underscore the multifunctional advantage of rGO-based hybrid ferrite composites, establishing them as compelling candidates for advanced structural, dielectric, and EMI shielding applications that demand a refined balance of mechanical integrity, electrical performance, and vibrational stability.
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, Rajeshkumar Selvaraj Materials Research Express, 2024 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.
Effect of drill bit type on delamination of graphene-reinforced carbon fiber composites along with impact, and damping properties AN Shankar, M George, SMM Krishna, S Chaudhary, AKS Singholi, ... Journal of Industrial Textiles 55, 15280837251367693 , 2025 2025 Citations: 2
Mechanical, tribological and modal characteristics of eco-friendly coir/sugarcane fillers reinforced polymer composites AN Shankar, M George, SMM Krishna, I Kakaravada, AK S Singholi, ... Materials Research Express 11 (10), 105511 , 2024 2024 Citations: 2
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 2023 Citations: 4
Dielectric Properties of Reduced Graphene Oxide with Nickel Cobalt Ferrite and Nickel Zinc Ferrite Epoxy Nanocomposites M George, PP George 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 2022 Citations: 2
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 2020 Citations: 5
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 2020 Citations: 31
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 2019 Citations: 7
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 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 4, 184-188 , 2015 2015 Citations: 1
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 2020 Citations: 31
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 2019 Citations: 7
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 2020 Citations: 5
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 2023 Citations: 4
Effect of drill bit type on delamination of graphene-reinforced carbon fiber composites along with impact, and damping properties AN Shankar, M George, SMM Krishna, S Chaudhary, AKS Singholi, ... Journal of Industrial Textiles 55, 15280837251367693 , 2025 2025 Citations: 2
Mechanical, tribological and modal characteristics of eco-friendly coir/sugarcane fillers reinforced polymer composites AN Shankar, M George, SMM Krishna, I Kakaravada, AK S Singholi, ... Materials Research Express 11 (10), 105511 , 2024 2024 Citations: 2
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 2022 Citations: 2
Effect of Flexible Wall Boundary in Seismic Design of Liquid Storage Tanks with Fluid Structure Interaction M George, A Rajan Int. J. Eng. Res 4, 184-188 , 2015 2015 Citations: 1
Dielectric Properties of Reduced Graphene Oxide with Nickel Cobalt Ferrite and Nickel Zinc Ferrite Epoxy Nanocomposites M George, PP George 2023
ELASTIC PROPERTY EVALUATION OF FIBRE REINFORCED GEOPOLYMER COMPOSITE USING SUGARCANE BAGASSE FIBRE M George 2022
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 2019
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
