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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia TELKOMNIKA (Telecommunication Computing Electronics and Control) ROTOR: JURNAL ILMIAH TEKNIK MESIN JURNAL NASIONAL TEKNIK ELEKTRO Spektra: Jurnal Fisika dan Aplikasinya Jurnal Teknologi Pertanian Andalas Indonesian Journal of Electrical Engineering and Computer Science Teknomekanik Andalasian International Journal of Applied Science, Engineering, and Technology METAL : Jurnal Sistem Mekanik dan Termal Journal of Fibers and Polymer Composites Journal of Engineering and Technological Sciences ASEAN Journal for Science and Engineering in Materials Analit: Analytical And Environmental Chemistry
Abral, Hairul
Universitas Andalas
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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Impact of Relative Humidity on Electrochemical Performance of MXene-Zn-CNC Composite Films Rudy Fernandez; Hairul Abral; Ikhwana Elfitri
ASEAN Journal for Science and Engineering in Materials Vol 4, No 2 (2025): AJSEM: Volume 4, Issue 2, September 2025
Publisher : Bumi Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examines the influence of relative humidity (RH) on the electrochemical and structural properties of polyvinyl alcohol (PVA) composite films reinforced with MXene, zinc oxide (ZnO), and cellulose nanocrystals (CNC). Composite films were fabricated via solvent casting and conditioned at RH levels of 50%, 75%, and 94%. Cyclic voltammetry and four-point probe tests revealed substantial enhancements in current density, specific capacitance, and bulk conductivity with increasing RH, attributed to improved ionic mobility and interfacial polarization. X-ray diffraction indicated reduced crystallinity due to polymer swelling, while scanning electron microscopy showed enhanced MXene dispersion at higher RH. Fourier-transform infrared spectroscopy confirmed intensified hydroxyl interactions, reflecting increased hydrophilicity. These humidity-induced improvements suggest promising applications in humidity-responsive flexible electronics and sensors. However, potential trade-offs include reduced mechanical stability under prolonged exposure. The findings offer new insights for optimizing hydrophilic polymer composites to enhance environmental adaptability and advanced device performance. 
Modified PVA Film from Methanol-Soluble Phenolic Extracts of Spatholobus littoralis Hask as Active Pharmaceutical Packaging Kadriadi Kadriadi; Hairul Abral; Melbi Mahardika; Ilhamdi Ilhamdi; Akmal Akmal; Dian Handayani; Yulianis Yulianis; Mohamad Haafiz Mohamad Kassim; Jeri Ariksa
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.567

Abstract

The development of active pharmaceutical packaging based on biodegradable materials is an important strategy to reduce dependence on single-use plastics and their environmental impact. Polyvinyl alcohol (PVA) is a potential biodegradable polymer, but it has limitations in terms of exposure to ultraviolet (UV) radiation and microbial contamination. This study aims to develop a modified PVA film with methanol-soluble phenolic extract of Spatholobus littoralis Hask as active pharmaceutical packaging with UV protection, antioxidant, and antibacterial functions. The phenolic extract was obtained through a maceration method using methanol as a solvent, while the PVA film was fabricated using the solution casting technique. The PVA film was modified with varying concentrations of phenolic extract of 0, 1.25, 2.5, and 5wt% (PPE0, PPE1.25, PPE2.5, and PPE5), then evaluated for its UV protection properties, antioxidant activity, and antibacterial activity. The results showed that the addition of S. littoralis phenolic extract was able to increase the ability of PVA films to block UV radiation completely (100%) in the 200–400 nm wavelength range. Antioxidant activity testing using the DPPH method showed an increase in free radical scavenging ability as the concentration of phenolic extract increased. In addition, the modified PVA film showed significant antibacterial activity against Staphylococcus aureus and Escherichia coli. These findings indicate that S. littoralis Hask phenolic extract has potential as a natural bioactive agent in the development of environmentally friendly and multifunctional active pharmaceutical packaging, with dual protection capabilities against UV degradation and microbial contamination. This research makes an important contribution to the development of sustainable pharmaceutical packaging materials based on renewable natural resources.
The Effect of Temperature on Manufacturing Process of Tannin Acid-Based Adhesive Materials on Mechanical and Physical Properties Mastariyanto Perdana; Hairul Abral; Lovely Son; Nanang Masruchin; Muhammad Azmi; Kadriadi Kadriadi
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.570

Abstract

This study focuses on the development and characterization of adhesives based on Polyvinyl Alcohol (PVA), Tannic Acid (TA), and Cellulose Nanofibre (CNF). The main objective is to optimize the temperature used in the production process. Phenol-formaldehyde and other synthetic adhesives frequently encounter environmental obstacles, necessitating the search for more ecologically sound alternatives. TA, a naturally occurring polyphenolic molecule, has significant potential as an eco-friendly glue ingredient. This study assesses the impact of temperature fluctuations (30, 45, 60, 75, and 90°C) during the glue manufacturing process on its mechanical characteristics, specifically emphasizing shear stress. Experiments were conducted at a rotational speed of 1500 revolutions per minute (RPM) for 30 minutes. The results indicated that the adhesive performed best at 90°C, achieving a maximum shear stress value of 3.41 MPa. The results demonstrated a significant enhancement in the shear strength of the bioadhesive, exhibiting an approximately sixfold increase as the processing temperature was elevated from 30°C to 90°C. Microstructural analysis reveals that the voids formed during the mixing process decrease at this specific temperature. The results indicate that elevated temperatures lead to a significant reduction in void formation. The FTIR measurement revealed the absorption of hydroxyl groups around 3305 cm⁻¹, suggesting the presence of robust crosslinking. Furthermore, elevated temperatures lead to a significant reduction of free OH- groups within the bioadhesive. The PVA/TA/CNF adhesive possesses extensive potential for application in industries that necessitate adhesives with exceptional strength. The study is anticipated to offer comprehensive understanding of how to improve the manufacturing process of TA-based adhesives, and its impact on the creation of adhesive materials that are more sustainable and environmentally friendly.
Co-Authors . Darwison A, Yufrizal Adam Malik Adjar Pratoto Adjar Pratoto, Adjar Ahmad Novi Muslimin Akmal Akmal Alfi Asben Anwar Kasim Ariadi Hazmi Aulia . Dian Handayani Dieter Rahmadiawan Dieter Rahmadiawan Edi Syafri Eka Putra Waldi Eka Satria Eko Kasmianto, Eko Elisabeth Feberlian Gulo Eni Sugiarti Exel Athoriq Fathoni, Andhy M Febrian Ilhamsyah Firman Ridwan Hendery Dahlan, Hendery Herwin Gevin Hery Sunarsono Ikhwana Elfitri Ikhwana Elfitri Ilhamdi Ilhamdi Ilhamsyah, Febrian Imtiaz Ali Laghari Imtiaz Ali Laghari Jeri Ariksa Kadriadi Kadriadi Laghari, Imtiaz Ali Lovely Son, Lovely M. H. Ahmad Mahardika, Melbi Mastariyanto Perdana Mastariyanto Perdana Mat Uzir Wahit Mega Fatimah Rosana Melbi Mahardika Melbi Mahardika Melbi Mahardika Melbi Mahardika Melbi Mahardika Mochamad Asrofi Mochamad Asrofi Mohamad Haafiz Mohamad Kassim Mohd Hafizi Ahmad Muhammad Azmi Muhammad Hafiz Nabawi, Rahmat Azis Nanang Masruchin Ogah, Ogah Anselm Putra, Gerardo Janitra Puriadi Putra, Nandy Setiadi Djaya R Mutya Rahmadiawan, Dieter Rahmat Azis Nabawi Ratna Wardani Rezqi, Khairu Rudy Fernandez Shih-Chen Shi Siregar, Yasmine Karenita Syahril Syahril Syahril Syahril Syukri Arief Syukri Yunus Thiago F. Santos Tio Baskara Umah, Kuntum Khairah Vitri Aprila Handayani Yufrizal Yufrizal Yulianis Yulianis