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All Journal POSITRON Padjadjaran Journal of Dentistry Greensusmater
Kusumaatmaja, Ahmad
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health

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Pengaruh NaClO2 terhadap Membran Nanofiber Polisulfon dengan Metode Electrospinning Fauji, Najmudin; Kusumaatmaja, Ahmad; Triyana, Kuwat
POSITRON Vol 7, No 2 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1433.482 KB) | DOI: 10.26418/positron.v7i2.1996

Abstract

Polisulfon merupakan polimer termoplastik yang banyak digunakan dalam pembuatan membran karena ketangguhan dan stabilitasnya pada suhu tinggi. Dalam penelitian ini, dibuat membran polisulfon kosentrasi 20% dengan metode electrospinning. Selanjutnya pada larutan polisulfon konsentrasi 20% dilakukan penambahan NaClO2 0,015 gram, 0,020 gram, dan 0,030 gram. Material-material pada membran tersebut diidentifikasi dengan menggunakan FTIR, sedangkan morfologi permukaan membran diamati dengan SEM. Hasil spektrum FTIR menunjukkan tidak adanya ikatan pada penambahan NaClO2. Ini berarti, tidak terjadi perubahan sifat pada membran sebelum dan setelah ditambahkan NaClO2. Diameter fiber membran polisulfon konsentrasi 20% dengan penambahan NaClO2 0,015 gram mengalami perubahan menjadi lebih kecil dari diameter fiber membran polisulfon konsentrasi 20%. Diameter membran polisulfon 20% memiliki diameter rata-rata nanofiber (801±185) nm, sedangkan diameter membran polisulfon 20% dengan penambahan NaClO2 0,015 gram memiliki diameter rata-rata nanofiber (252±57) nm. Ini berarti penambahan NaClO2 pada larutan polisulfon 20% berpengaruh pada perubahan diameter. Pada membran polisulfon 20% dengan penambahan NaClO2 0,020 gram dan 0,030 gram tidak terbentuk membran (hanya terbentuk spray).  
Investigating the influence of polyacrylonitrile nanofiber thickness on particulate matter filtration performance from cigarette smoke Wardiningsih , Dina; Aflaha , Rizky; Maharani , Chlara Naren; Triyana , Kuwat; Kusumaatmaja, Ahmad
Greensusmater Vol. 1 No. 1 (2024): Inaugural issue
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2024.1.1.32-38

Abstract

This study successfully fabricated polyacrylonitrile (PAN) nanofiber in various thicknesses as particulate matter (PM) filtration membranes using the electrospinning method. The PM source used was derived from cigarette smoke. Scanning electron microscopy (SEM) images and Fourier-transform infrared (FTIR) spectra are provided in the manuscript to observe the morphology and chemical composition of the fabricated nanofiber membrane. The thickness of the nanofiber was controlled based on the volume of the polymer solution, which was 4 mL, 6 mL, and 8 mL, and had a thickness of (52 ± 2) µm, (176 ± 27) µm, and (479 ± 38) µm, respectively (denoted as NF-4, NF-6, and NF-8 membranes). The results showed that the nanofiber membrane performed well against PM0.3, PM1, and PM2.5, with efficiency above 95.7%. Furthermore, it was observed that increasing the thickness of the nanofiber resulted in higher filtration efficiency. This trend is evident in the NF-8 membrane, which exhibited an efficiency of (97.9 ± 0.3)%, compared to only (95.7 ± 0.2)% for the NF-4 membrane against PM0.3. However, the pressure drop is also higher ((0.03 ± 0.005) kPa), which causes a trade-off in the quality factor (QF) of fabricated nanofiber performance as a PM filtration membrane.
Effect of sandblasted large grit acid etching and ultraviolet-c photofunctionalization of titanium on osteoblast cell viability: an in vitro study Tjandra, Andreas; Murdiastuti, Kwartarini; Kusumaatmaja, Ahmad; Susilowati, Heni
Padjadjaran Journal of Dentistry Vol 38, No 2 (2026): July 2026
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol38no2.70560

Abstract

Introduction: Sandblasted Large Grit Acid Etching (SLA) is a widely used titanium implant surface modification technique that enhances osseointegration. Ultraviolet C (UV-C) photofunctionalization is a method that modifies the physicochemical properties of titanium surfaces by removing hydrocarbon contaminants and increasing hydrophilicity. However, the combined effects of these modification techniques on MC3T3-E1 osteoblast cell viability require further investigation. Therefore, this study aimed to analyze the effect of SLA treatment and its interaction with UV-C irradiation on MC3T3-E1 osteoblast cell viability on titanium disks. Methods: This in vitro experimental study used titanium disks (10 mm in diameter and 1 mm in thickness), which were divided into SLA-treated and non-SLA groups. Each group was further subdivided according to UV-C irradiation (90 W, 254 nm) into four subgroups: non-UV (control), 10 minutes, 30 minutes, and 48 hours (n = 4 per subgroup). MC3T3-E1 osteoblasts (1.2×104 cells/well) were seeded onto disk surfaces and cultured for 24 hours. Cell viability was assessed using the MTT assay. Data normality was evaluated using the Shapiro-Wilk test, homogeneity using the Brown-Forsythe test, and differences between groups using two-way ANOVA, with statistical significance set at p <0.05. Results: Two-way ANOVA revealed that UV irradiation had no significant effect on cell viability (F=2.388; p=0.093). Similarly, SLA treatment showed no significant effect (F= 1.679; p = 0.207), and no significant interaction was observed between SLA treatment and UV-C irradiation (F=0.041; p=0.988). The highest mean cell viability was observed in the non-SLA group exposed to UV-C irradiation for 10 minutes (88.53 ± 25.22), whereas the lowest mean cell viability was found in the SLA group without UV-C irradiation (45.55 ± 16.29). Conclusion: Neither UV-C irradiation nor SLA treatment significantly affected MC3T3-E1 osteoblast cell viability, and no significant interaction was observed between the two treatments.
Co-Authors Aflaha , Rizky Heni Susilowati Kuwat Triyana Kwartarini Murdiastuti Maharani , Chlara Naren Najmudin Fauji Tjandra, Andreas Triyana , Kuwat Wardiningsih , Dina