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Harun, Mohd Hamzah
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Materials Science & Nanotechnology Physics

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Effect of Gamma Irradiation on the Optical Characteristics of PVA-PANI Composite Polymer Films Othman, Norfazlinayati; Harun, Mohd Hamzah; Mohamed, Mahathir; Alias, Mohd Sofian; Talib, Zainal Abidin
Journal of Material Science and Radiation Vol. 1 No. 3 (2025): December
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/jmsr.v1i3.394

Abstract

This manuscript reports the optical and structural characteristics of PVA/PANI composite polymer films synthesized through gamma-irradiation-induced in-situ polymerization. The in-situ formation of the conductive emeraldine salt phase of polyaniline (PANI) within the polyvinyl alcohol (PVA) binder matrix was achieved under different irradiation doses. The formation of the conductive PANI phase and the presence of Cl⁻ counter-ions were confirmed through FESEM morphological analysis and EDAX elemental mapping, respectively. XRD spectra further verify the semi-crystalline nature of the composite and indicate the structural role of PVA as a binder in stabilizing the polymeric composite system. Thermal behavior analysis using TGA reveals four distinct decomposition phases, with the most pronounced thermal transition observed in the composite irradiated at 50 kGy, suggesting enhanced structural interactions between PVA and PANI at this irradiation dose. Overall, the results demonstrate that gamma irradiation is an effective route for modifying the optical, structural, and thermal properties of PVA/PANI composites, making them promising candidates for optoelectronic and conductive polymer applications
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): December
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): December
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.
Co-Authors Alias, Mohd Sofian Aziz, Aisha Dalila Ab Ezani, Nor Adnin Ezani Mohd Faisal, Sharilla Mohd Halim, Khairul Azhar Abdul Hilmi, Farah Fadzehah Ismail, Rosley Che 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 Talib, Zainal Abidin Umar, Khairil Nor Kamal Zaharuddin, Izzuddin Mohamad Zaharuddin, Izzuddin Mohd