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SIFAT MEKANIK DAN FISIK 3D-PRINTED DENTAL PHOTOPOLYMER RESINS DALAM KONDISI PEMROSESAN YANG BERBEDA Ahmad Mamba'udin; Muhammad Akhsin Muflikhun; Adam Zuyyinal Adib; Dianisa Khoirum Sandi; Elfrida Rizky Riadini; Yuris Bahadur Wirawan
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.796

Abstract

Photopolymer resins have widely applied in dentistry to fabricate temporary restorations. This work gives a complete characterization of a dental non-castable photopolymer resin prepared via Digital Light Processing (DLP) 3D printing. Specimens were printed at layer thicknesses of 0.05, 0.075, and 0.1 mm, followed by post-cured treatments under UV light for 10, 20, and 30 minutes. A series of material characterization tests were performed, including assessments of hardness, moisture absorption behavior, and density measurements. The results indicate that hardness and moisture content are significantly impacted by post-curing time, while extended curing times resulted in greater specimen’s hardness and decreased moisture content. An increase in layer thickness led to a gradual reduction in hardness. A maximum hardness value of 57.7 Shore D was observed in the 3D-printed specimen, along with a highest moisture content of 1.05% MC. As expected, the specimens exhibited consistent density (1.19 ± 0.02 g/cm³) throughout all layer thickness and curing time variations. This study highlights the critical need to understand how process parameters affect dental non-castable photopolymer resin properties prior to clinical implementation.
Airflow Channel-Integrated Structured Fabric for High-Efficiency Solar Desalination Polonia, Betti Ses Eka; Yuswanda, Ikko; Jamasri, Jamasri; Fikry, M J Mohammad; Muflikhun, Muhammad Akhsin
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 10 No. 1 (2026): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v10i1.31434

Abstract

The global shortage of freshwater and energy issues require the advancement of sustainable desalination technologies. This work introduces a novel structured fabric combined with an airflow channel for enhanced solar steam generation (SSG) efficiency. The instrument employs a synergistic composite of carbon fiber, serving as a wide-band photothermal absorber, and Tencel, which facilitates rapid capillary water movement due to its hydrophilic cellulose structure. Engineered airflow channels were incorporated into the evaporator design to surmount the thermodynamic limitations of stagnant vapor boundary layers. The findings indicate that a 5 mm channel width offers the ideal equilibrium between vapor diffusion and active photothermal surface area, resulting in a peak mass loss of approximately 1.75 kg/m² under 1 sun illumination. This layout markedly surpassed 2 mm, 10 mm, and non-channeled designs in both photothermal and convection-driven circumstances. This study presents a scalable and efficient approach to improving solar desalination by structural micro-environment alteration.