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Umar, Khairil Nor Kamal
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Materials Science & Nanotechnology Physics

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Characterization of Photocurable Functionalized-CNT Nanocoating to Mitigate the Naturally Emission of Radon Gas Aziz, Aisha Dalila Ab; Harun, Mohd Hamzah; Zaharuddin, Izzuddin Mohamad; Ezani, Nor Adnin Ezani Mohd; Othman, Norfazlinayati; Mohamed, Mahathir; Alias, Mohd Sofian; Rahman, Mohd Faizal Abd; Umar, Khairil Nor Kamal; Mudri, Nurul Huda; Halim, Khairul Azhar Abdul; Mustafa, Mohamad Syahiran; Mejus, Lakam; Razalim, Faizal Azrin Abdul; Ismail, Rosley Che; Sani, Abdul Muiz Mohd; Faisal, Sharilla Mohd; Tajau, Rida
Journal of Material Science and Radiation Vol. 1 No. 3 (2025)
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i3.480

Abstract

This study focuses on the synthesis and characterization of an anti-radon photocurable nanocoating formulated using a UV-curable formulation incorporated with functionalized carbon nanotubes (F-CNTs). The coating was prepared using Ebecryl 600 (urethane acrylate oligomer) and TMPTA (monomer), with GPTMS as a coupling agent and various photoinitiator combinations. Different F-CNT loadings ranging from 0.1 to 0.9 wt% were studied to evaluate their effects on coating performance. The samples were cured under UV irradiation for 2–20 passes to investigate the influence of exposure time on polymer crosslinking. Characterization analyses including pendulum hardness, Fourier-transform infrared spectroscopy (FTIR), viscosity, gel content, and radon gas permeability were performed. Results indicated that the incorporation of F-CNTs enhanced the mechanical strength and crosslinking density of the coating. The optimal formulation exhibited a hardness of 150.33 s (BAPO + 8 passes) and a gel content of 97%. Furthermore, radon concentration measurements showed a 28.9% reduction after applying a single coating layer, confirming the coating’s potential as an effective barrier for radon gas mitigation.
Synthesis of Carbon Nanomaterials from Polyethylene Terephthalate (PET) Waste Using Chemical Vapor Deposition Ezani, Nor Adnin Ezani Mohd; Harun, Mohd Hamzah; Zaharuddin, Izzuddin Mohd; Othman, Norfazlinayati; Mohamed, Mahathir; Alias, Mohd Sofian; Rahman, Mohd Faizal Abd; Umar, Khairil Nor Kamal; Mudri, Nurul Huda; Halim, Khairul Azhar Abdul; Hilmi, Farah Fadzehah; Tajau, Rida
Journal of Material Science and Radiation Vol. 1 No. 3 (2025)
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i3.482

Abstract

Upcycling is an effective approach to reduce plastic waste, polyethylene terephthalate (PET) and promote sustainability. Plastic bottles usually were made from PET polymer and a raw material to produce carbon nanomaterials (CNMs). CNMs are synthesized using chemical vapor deposition (CVD) process and purified to eliminate catalysts and unwanted compounds. Various catalysts were used to investigate the economic and effective in producing the CNMs. Metal catalysts such as ferrocene, cobalt and iron are the important elements in the CVD process as they provide surfaces for carbon to attach. CNMs morphology and graphitic structure were observed from Raman analysis and TEM analysis. The application of upcycling offers the advantage of utilizing low-cost raw materials to produce higher-value products, providing additional benefits.
Effect of Functional Carbon Nanotube Fillers on the Physical and Thermal Characterization of Radiation Curable Coating Khairi, Khairul Aiman; Harun, Mohd Hamzah; Othman, Norfazlinayati; Mohamed, Mahathir; Alias, Mohd Sofian; Rahman, Mohd Faizal Abd; Umar, Khairil Nor Kamal; Tajau, Rida; Ismail, Nor Batrisya; Zaharuddin, Izzuddin Mohamad; Aminuddin, Siti Nur Eyisha Wafa Mohd
Journal of Material Science and Radiation Vol. 1 No. 2 (2025)
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i2.373

Abstract

This work investigates the formulation of a radiation-curable coating that integrates functionalized carbon nanotubes (f-CNT) to improve surface characteristics. Trimethylolpropane triacrylate (TMPTA) was employed as the monomer, with epoxy acrylate and urethane acrylate as oligomers and Irgacure-500 as the photoinitiator. To cure the coatings, the formulations were subjected to ultraviolet (UV) light, and the surface properties were investigated using Fourier-transform infrared spectroscopy (FTIR), pendulum hardness testing, and thermogravimetric analysis (TGA). The results show that altering the ratios of f-CNT in the formulations have a considerable impact on the mechanical and thermal characteristics of the coating. The findings show that ideal compositions of these additives improve the hardness, crosslinking density, and thermal stability of the cured films, offering insight into their potential
Chemical, Structural and Thermal Analysis of PET Flakes induced by Electron Beam Irradiation Ismail, Nor Batrisya; Harun, Mohd Hamzah; Zaharuddin, Izzuddin Mohamad; Othman, Norfazlinayati; Mohamed, Mahathir; Alias, Mohd Sofian; Rahman, Mohd Faizal Abd; Umar, Khairil Nor Kamal; Mudri, Nurul Huda; Halim, Khairul Azhar Abdul; Tajau, Rida; Ghazali, Rusdyana Natasa; Aminuddin, Siti Nur Eyisha Wafa Mohd
Journal of Material Science and Radiation Vol. 1 No. 2 (2025)
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i2.393

Abstract

This study presents a comprehensive chemical, structural, and thermal characterization of polyethylene terephthalate (PET) flakes subjected to electron beam irradiation at doses of 0, 40, and 120 kGy. Post-consumer PET bottle flakes were analyzed using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Thermogravimetric Analysis (TGA) to determine irradiation-induced modifications. FTIR results reveal noticeable variations in key functional groups, particularly in the ester (C=O and C–O) and aromatic regions, indicating chain scission, partial cross-linking, and oxidation with increasing radiation doses. XRD analysis shows a progressive reduction in peak intensity and an increase in peak broadening, signifying decreased crystallinity and enhanced amorphous character due to structural disorder. TGA measurements demonstrate improved thermal stability of irradiated PET, with major degradation shifting from ~450 °C in the non-irradiated sample to ~480 °C after irradiation, and a clearer two-stage degradation pattern associated with structural rearrangements. These findings confirm that electron beam irradiation induces significant yet controlled modifications on PET’s molecular structure, crystallinity, and thermal behavior. Such property alterations highlight the potential of electron beam treatment as an effective pre-processing approach to enhance the recyclability and performance of waste PET, contributing to more sustainable plastic waste management strategies
Co-Authors Alias, Mohd Sofian Aminuddin, Siti Nur Eyisha Wafa Mohd Aziz, Aisha Dalila Ab Ezani, Nor Adnin Ezani Mohd Faisal, Sharilla Mohd Ghazali, Rusdyana Natasa Halim, Khairul Azhar Abdul Harun, Mohd Hamzah Hilmi, Farah Fadzehah Ismail, Nor Batrisya Ismail, Rosley Che Khairi, Khairul Aiman Mejus, Lakam Mohamed, Mahathir Mudri, Nurul Huda Mustafa, Mohamad Syahiran Othman, Norfazlinayati Rahman, Mohd Faizal Abd Razalim, Faizal Azrin Abdul Sani, Abdul Muiz Mohd Tajau, Rida Zaharuddin, Izzuddin Mohamad Zaharuddin, Izzuddin Mohd