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  • Open Access

    ARTICLE

    Infrared and Microwave Radiation Assisted Self-Healing Property of Exfoliated-Graphene Incorporated Styrene-Isoprene-Styrene Nanocomposites

    Shilpi Tiwari*, Manjari Srivastava, Dibyendu S. Bag*

    Journal of Polymer Materials, Vol.42, No.1, pp. 187-204, 2025, DOI:10.32604/jpm.2025.057322 - 27 March 2025

    Abstract Smart materials with self-healing properties are highly desired. This study investigates graphene-incorporated styrene-isoprene-styrene (SIS) nanocomposites for their self-healing property assisted by Infrared (IR) and microwave radiation. The good thermal conductivity and energy-absorbing capacity of graphene offer self-healing capability to SIS/GnP nanocomposites due to their exposure to IR and microwave radiation. The absorbed energy in graphene is transferred to the SIS matrix, facilitating the diffusion, re-entanglement, and restoration of the SIS polymer chains, resulting in multiple times self-healing capabilities using various external stimuli. All SIS/GnP nanocomposite samples exhibit self-healing behavior, and the healing efficiency rises with… More > Graphic Abstract

    Infrared and Microwave Radiation Assisted Self-Healing Property of Exfoliated-Graphene Incorporated Styrene-Isoprene-Styrene Nanocomposites

  • Open Access

    ARTICLE

    Hybrid Epoxy Composites Reinforced with Coconut Sheath and Basalt Fibres: Enhancing Mechanical and Thermal Performance for Sustainable Applications

    Subburayan Manickavasagam Suresh Kumar1, Sundaravel Balachandran2, Seong Cheol Kim3, Balamurugan Rathinam4,*, Vanaraj Ramkumar3,5,*

    Journal of Polymer Materials, Vol.41, No.4, pp. 207-218, 2024, DOI:10.32604/jpm.2024.057901 - 16 December 2024

    Abstract The present study focuses on sustainable biopolymer composites created from coconut sheath and basalt fibres, which are biodegradable, environmentally benign, and have low carbon footprints. High specific strength, superior mechanical performance, reduced weight, and improved thermal stability are all displayed by these materials. Four hybrid epoxy composites (C1–C4) were produced utilizing five stacking sequences and compression moulding, demonstrating that hybridization considerably enhances mechanical characteristics. The hybrid and pure basalt fibre composites have larger storage moduli than untreated coconut sheath fibre-reinforced epoxy (2.1 GPa). The greatest glass transition temperature (Tg) for C4 has been determined to More > Graphic Abstract

    Hybrid Epoxy Composites Reinforced with Coconut Sheath and Basalt Fibres: Enhancing Mechanical and Thermal Performance for Sustainable Applications

  • Open Access

    ARTICLE

    Effect of Thermal Ageing on the Thermal and Mechanical Properties of Polypropylene and Polypropylene Micro-Composites

    Rachid Bouregba1,2, Bel Abbes Bachir Bouiadjra2,*, Mohamed Mokhtar Bouziane3, Mohamed Amine Bellali2, Mokadem Salem2

    Journal of Polymer Materials, Vol.41, No.3, pp. 143-158, 2024, DOI:10.32604/jpm.2024.056385 - 30 September 2024

    Abstract The use of polypropylene composites in various industrial fields has expanded considerably in recent years. A number of researches have been carried out to characterize the performance of polypropylene and its composites. However, the effects of ageing on the long-term behaviour of this thermoplastic are not well understood. The purpose of this study is to analyse the consequences of thermal degradation on the thermal and mechanical properties of three distinct materials: virgin Polypropylene (PP), virgin Polypropylene + talc (PP/talc), and virgin Polypropylene + Carbon Black (PP/CB) micro-composites. Specimens of these materials underwent exposure in an… More >

  • Open Access

    ARTICLE

    Robust Particle Swarm Optimization Algorithm for Modeling the Effect of Oxides Thermal Properties on AMIG 304L Stainless Steel Welds

    Rachid Djoudjou1,*, Abdeljlil Chihaoui Hedhibi3, Kamel Touileb1, Abousoufiane Ouis1, Sahbi Boubaker2, Hani Said Abdo4,5

    CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.2, pp. 1809-1825, 2024, DOI:10.32604/cmes.2024.053621 - 27 September 2024

    Abstract There are several advantages to the MIG (Metal Inert Gas) process, which explains its increased use in various welding sectors, such as automotive, marine, and construction. A variant of the MIG process, where the same equipment is employed except for the deposition of a thin layer of flux before the welding operation, is the AMIG (Activated Metal Inert Gas) technique. This study focuses on investigating the impact of physical properties of individual metallic oxide fluxes for 304L stainless steel welding joint morphology and to what extent it can help determine a relationship among weld depth… More >

  • Open Access

    ARTICLE

    Thermo-Mechanical, Physico-Chemical, Morphological, and Fire Characteristics of Eco-Friendly Particleboard Manufactured with Phosphorylated Lignin Addition

    Apri Heri Iswanto1,*, Harisyah Manurung1, Asma Sohail2, Lee Seng Hua3,9, Petar Antov4, Deded Sarip Nawawi5, Sarah Latifah5, Dewi Shafa Kayla5,6, Sukma Surya Kusumah6, Muhammad Adly Rahandi Lubis6, Linda Makovická Osvaldová7, Mohd. Hazwan Hussin8, Rangabhashiyam Selvasembian9, Lum Wei Chen10, Puji Rahmawati Nurcahyani6, Nam Hun Kim11, Widya Fatriasari6

    Journal of Renewable Materials, Vol.12, No.7, pp. 1311-1341, 2024, DOI:10.32604/jrm.2024.052172 - 21 August 2024

    Abstract Lignin, lignosulfonate, and synthesized phosphorylated lignosulfonate were introduced as green fillers in citric acid-sucrose adhesives for bonding particleboard fabricated from areca leaf sheath (ALS). The characteristics of particleboards were compared to that of ultralow emitting formaldehyde (ULEF-UF). The fillers derived from Eucalyptus spp. kraft-lignin were added for flame retardancy enhancement. 10% of each lignin and modified lignin was added into the ULEF-UF and citric acid-sucrose bonded particleboards. Analyses applied to particleboards included thermal characteristics, X-ray diffraction analysis (XRD), morphological properties, Fourier transform infrared spectroscopy (FTIR), as well as physical, mechanical, and fire resistance characteristics of the… More > Graphic Abstract

    Thermo-Mechanical, Physico-Chemical, Morphological, and Fire Characteristics of Eco-Friendly Particleboard Manufactured with Phosphorylated Lignin Addition

  • Open Access

    ARTICLE

    Thermo-Physical Potential of Recycled Banana Fibers for Improving the Thermal and Mechanical Properties of Biosourced Gypsum-Based Materials

    Youssef Maaloufa1,2,3,*, Soumia Mounir1,2,3, Sara Ibnelhaj2, Fatima Zohra El Wardi6, Asma Souidi3, Yakubu Aminu Dodo4,5, Malika Atigui3, Mina Amazal3, Abelhamid Khabbazi2, Hassan Demrati3, Ahmed Aharoune3

    Journal of Renewable Materials, Vol.12, No.4, pp. 843-867, 2024, DOI:10.32604/jrm.2024.049942 - 12 June 2024

    Abstract The development of bio-sourced materials is essential to ensuring sustainable construction; it is considered a locomotive of the green economy. Furthermore, it is an abundant material in our country, to which very little attention is being given. This work aims to valorize the waste of the trunks of banana trees to be used in construction. Firstly, the physicochemical properties of the fiber, such as the percentage of crystallization and its morphology, have been determined by X-ray diffraction tests and scanning electron microscopy to confirm the potential and the impact of the mode of drying on… More >

  • Open Access

    ARTICLE

    Thermal Radiation Effects on 2D Stagnation Point Flow of a Heated Stretchable Sheet with Variable Viscosity and MHD in a Porous Medium

    Muhammad Abaid Ur Rehman1,*, Muhammad Asif Farooq1, Ahmed M. Hassan2

    Frontiers in Heat and Mass Transfer, Vol.22, No.1, pp. 263-286, 2024, DOI:10.32604/fhmt.2023.044587 - 21 March 2024

    Abstract This paper proposes a mathematical modeling approach to examine the two-dimensional flow stagnates at over a heated stretchable sheet in a porous medium influenced by nonlinear thermal radiation, variable viscosity, and MHD. This study’s main purpose is to examine how thermal radiation and varying viscosity affect fluid flow motion. Additionally, we consider the convective boundary conditions and incorporate the gyrotactic microorganisms equation, which describes microorganism behavior in response to fluid flow. The partial differential equations (PDEs) that represent the conservation equations for mass, momentum, energy, and microorganisms are then converted into a system of coupled… More >

  • Open Access

    ARTICLE

    Chiral Copolymers of (R)-N-(1-Phenyl-Ethyl) Methacrylamide (R-NPEMAM) and 2-Hydroxy Ethyl Methacrylate (HEMA): Investigation of PhysicoChemical Behavior, Thermal Properties and Degradation Kinetics

    DIBYENDU S. BAG*, SHILPI TIWARI, AKANSHA DIXIT, KM. MEENU

    Journal of Polymer Materials, Vol.40, No.1-2, pp. 105-123, 2023, DOI:10.32381/JPM.2023.40.1-2.9

    Abstract In this paper, we report the microstructural investigation and influence of H-bonding on the thermal behavior e.g., glass transition (Tg ) and thermal degradation of chiral copolymers of (R)- N-(1-phenyl-ethyl) methacrylamide (R-NPEMAM) and 2-hydroxy ethyl methacrylate (HEMA). The Tg increases with the increase of chiral unit content in the copolymers and then attains optimum at around 25 mole % of chiral content. Thereafter it decreases with the increase of chiral content. The effect of copolymer composition and secondary interaction associated with the Hbonding on the thermal properties of these copolymers was also studied. Secondary interaction, specifically More >

  • Open Access

    ARTICLE

    Prediction and Optimization of the Thermal Properties of TiO2/Water Nanofluids in the Framework of a Machine Learning Approach

    Jiachen Li1,2, Wenlong Deng3, Shan Qing1,2,*, Yiqin Liu4, Hao Zhang1,2, Min Zheng1,2

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.8, pp. 2181-2200, 2023, DOI:10.32604/fdmp.2023.027299 - 04 April 2023

    Abstract In this study, comparing multiple models of machine learning, a multiple linear regression (MLP), multilayer feed-forward artificial neural network (BP) model, and a radial-basis feed-forward artificial neural network (RBF-BP) model are selected for the optimization of the thermal properties of TiO2/water nanofluids. In particular, the least squares support vector machine (LS-SVM) method and radial basis support vector machine (RB-SVM) method are implemented. First, curve fitting is performed by means of multiple linear regression in order to obtain bivariate correlation functions for thermal conductivity and viscosity of the nanofluid. Then the aforementioned models are used for a More >

  • Open Access

    ARTICLE

    Numerical Analysis of the Thermal Properties of Ecological Materials Based on Plaster and Clay

    A. Lkouen1,*, M. Lamrani2, A. Meskini1, A. Khabbazi3

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.8, pp. 2013-2026, 2023, DOI:10.32604/fdmp.2023.026929 - 04 April 2023

    Abstract Most of the energy savings in the building sector come from the choice of the materials used and their microphysical properties. In the present study, through numerical simulations a link is established between the thermal performance of composite materials and their microstructures. First, a two-phase 3D composite structure is modeled, then the RSA (Random Sequential Addition) algorithm and a finite element method (FE) are applied to evaluate the effective thermal conductivity of these composites in the steady-state. In particular, building composites based on gypsum and clay, consolidated with peanut shell additives and/or cork are considered.… More > Graphic Abstract

    Numerical Analysis of the Thermal Properties of Ecological Materials Based on Plaster and Clay

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