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All Journal Phi : Jurnal Pendidikan Fisika dan Terapan Journal of Energy, Material, and Instrumentation Technology
Ginting, Pariaman
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Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Other

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Exploration the Influence of Ag+ Ion Solution Concentration Variations Coated on Biofoam Based on Cassava Starch and Corn Fiber on Crystallinity, Density, and Porosity Ginting, Pariaman; Sutiarno, Sutiarno; Wijaya, Galang Haedi; Karo, Pulung Karo; Suka, Ediman Ginting; Riyanto, Agus
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 2 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i2.177

Abstract

The bio-foam in this study was made from biopolymers in the form of cassava starch, cellulose from corn stalks, and a binder polymer in the form of polyvinyl alcohol (PVA). The bio-foam was molded using the thermo pressing method at T = 150 °C and pressed for t = 3 minutes. Ag+ ions were added as an initial review of the physics properties of the bio-foam to serve as a reference for future antibacterial bio-foam manufacturing. Ag+ ions were produced using the electrolysis method from AgBr rods with an electric voltage of 15 volts. Then, the electrolyzed solution containing Ag+ ions was varied in concentration (12 ppm, 17 ppm, 22 ppm, 27 ppm). The ions were then coated on the bio-foam using the dip coating method and dried at room temperature. Along with the increase in the concentration of the Ag+ ion solution coated on the bio-foam, there was an increase in the bio-foam crystallinity with test values of 34.4%, 40.8%, 41.2%, and 42.6%, respectively. Based on these data, the crystallinity value of the bio-foam does not change significantly. It also aligns with the density test values, which tend to be constant with an average test value of 0.322 g/cm³. Furthermore, the concentration of the solution containing Ag+ ions did not influence the bio-foam's porosity properties, where the four samples tended to remain with an average value of 5.9%.
Pengaruh Variasi Ion Ag+ terhadap Pembentukan Biofoam Antibakteri Berbasis Pati Singkong dan Selulosa Batang Jagung Wijaya, Galang Haedi; Sutiarno, Sutiarno; Ginting, Pariaman; Riyanto, Agus; Karokaro, Pulung; Syafriadi, Syafriadi
Phi: Jurnal Pendidikan Fisika dan Terapan Vol 7, No 2 (2021)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/p-jpft.v7i2.13369

Abstract

Telah dilakukan penelitian biofaom menggunakan biopolimer alam berupa pati singkong, selulosa dari serat jagung, dan polivinil Alkohol (PVA). Pembuatan biofoam tersebut dicetak menggunakan metode thermopressing dengan T=150 OC dan ditekan t = 3 menit. Untuk meningkatkan kualitas produk, ditambahkanlah bahan aditif berupa ion Ag+ yang dapat memberikan sifat antibakteri biofoam. Ion Ag+ diproduksi dengan menggunakan metode elektrolisis dari batang AgBr  menggunakan tegangan listrik 15 Volt. Kemudian, larutan yang mengandung ion Ag+  hasil elektrolisis divarisasikan konsentrasi (12 ppm, 17 ppm, 22 ppm, 27 ppm). Ion tersebut kemudian dilapiskan ke dalam produk biofoam menggunakan metode dip coating, lalu dikeringkan pada suhu ruangan. Berdasarkan hasil karakterisasi FTIR,  gugus fungsi O-H dan N-H bending diduga tempat menempelnya ion Ag+ pada biofoam. Hal ini dikarenakan tingginya afinitas gugus tersebut serta perbedaan nilai keelektronegatifan pada atom O dan N. Berdasarkan hasil uji antibakteri bakteri Bacillus sp didapatkanlah nilai diameter zona hambat pengujian pada keempat sampel berturut-turut 1,88 mm, 2,88 mm, 5,55 mm, dan 7,44 mm. Namun, hasil berbeda didapatkan pada pengujian bakteri Escherchia coli dengan tidak munculnya zona hambat yang dihasilkan. Kemudian, penambahan ion Ag+ pada biofoam tidak mempengaruhi pengujian daya serap air karena nilai pengujian cendrung tetap dengan rata-rata pengujian daya serap air mecapai 18,37%.
Co-Authors Agus Riyanto Karo, Pulung Karo Karokaro, Pulung Suka, Ediman Ginting Sutiarno, Sutiarno Syafriadi Syafriadi Wijaya, Galang Haedi