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All Journal Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Jurnal Polimesin
muwaffaq, Abiyyu Sayyid
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Astronomy Automotive Engineering Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Effect of Speed and Turning Time Pulley on the Quantity and Quality of Output Multipurpose Chopper Machine Sari, Kartika; Sunardi, Sunardi; muwaffaq, Abiyyu Sayyid; Aminuddin, Jamrud; Khoryanton, Ampala; Warso, Warso; Budi Utomo, Agung Bambang
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4098

Abstract

Variation of pulley rotational speed on the yield and cut of the multipurpose chopper aims to determine the optimum quality and quantity of chopping results. Testing using cassava and bananas. The diameter of the pulley used is 2 inches and the driven pulley is 6, 7, and 10 inches with a pulley speed of 467, 400, and 275 rpm. The result of bananas shows that the average chopping was 573, 864, and 864 grams, respectively with the spin pulley time being 46, 90, and 59 seconds. Meanwhile, for cassava, the results of chopping were 984, 995, and 823 grams, respectively with the spin pulley time being 23, 59, and 35 seconds, respectively. The optimum chopping quality for bananas used a pulley diameter of 10 inches and an optimum rotation time was 59 seconds. The optimum slicing quality for cassava uses a pulley diameter of 7 inches with an optimum rotation time was 59 seconds. The conclusion is that the diameter of the pulley affects the thickness of the sample, the time and speed of the pulley rotation, and the quality of the chopping results.
Gugus Fungsi Kitosan/LiOH Terdispersi Silika Fly Ash untuk Membran Polimer Elektrolit Padat Sari, Kartika; Sudaryanto, Sudaryanto; Muwaffaq, Abiyyu Sayyid; Marsudi, Sulis
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2025: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2025
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v0i0.115657

Abstract

Membran elektrolit padat berbasis bahan ramah lingkungan menggunakan limbah abu bakar batu bara (fly ash) dalam bentuk silika sedang dikembangkan. Sintesis dan karakterisasi membran polimer padat berbasis kitosan dan LiOH dengan penambahan silika (SiO2) dari fly ash bertujuan untuk meningkatkan konduktivitas ionik dan stabilitas membran. Variasi komposisi penambahan silika fly ash sebesar 2% (S2), 4% (S4), dan 6% (S6) terhadap massa kitosan menggunakan metode solution casting. Sedangkan, Pengujian untuk menentukan gugus fungsi membran menggunakan spektroskopi Fourier Transform Infrared Spectroscopy (FTIR) dan Electrochemical Impedance Spectroscopy (EIS). Hasil FTIR untuk sampel (S2), (S4), dan (S6) menunjukkan pergeseran bilangan gelombang pada gugus O–H, N–H, C=O, dan Si–O yang memperkuat interaksi molekuler serta meningkatkan potensi jalur konduktif ion. Hasil EIS menunjukkan bahwa komposisi silika fly ash 6% menghasilkan impedansi terbaik. Hasil ini ditandai dengan bentuk kurva semicircle, yang mengindikasikan proses relaksasi ionik yang lebih efisien. Penambahan silika fly ash dapat memperbaiki struktur kimia dan meningkatkan interaksi antar molekul. Sehingga, membran polimer elektrolit padat kitosan/LiOH terdispersi ilika fly ash   dapat digunakan sebagai salah satu material elektrolit padat yang aman dan efisien untuk baterai lithium.
Co-Authors Aminuddin, Jamrud Budi Utomo, Agung Bambang Kartika Sari Khoryanton, Ampala Marsudi, Sulis SUDARYANTO SUDARYANTO Sunardi Sunardi Warso Warso, Warso