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All Journal Jurnal Akuakultur Indonesia JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Materi Indonesia Sinergi JURNAL INTEGRASI PROSES CHEMPUBLISH JOURNAL Jurnal Teknik Mesin Syntax Literate: Jurnal Ilmiah Indonesia Indonesian Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Rekayasa Energi dan Mekanika Makara Journal of Science Makara Journal of Technology International Journal of Innovation in Mechanical Engineering and Advanced Materials
Alfian Noviyanto
Universitas Mercu Buana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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THE EFFECT OF ADDITION GREEN INHIBITOR D-GALACTOSE ON CORROSION RATE OF ALUMINUM ALLOY 5052 IN SULFURIC ACID (H2SO4) MEDIA Muhajirin Muhajirin; I. G. A. Arwati; S. Hartati; H. Hakim; Alfian Noviyanto; Arramel Arramel; T. Zakly
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 4, No 2 (2022)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v4i2.16610

Abstract

Aluminum alloy 5052 (Al5052) is one of the metals used as a bipolar plate in a Proton Exchange Membrane Fuel Cell (PEMFC) due to has its light mass and being easy to form, and, has high conductivity and resistivity properties. This material is prone to corrosion and current knowledge to protect its surface is currently lacking. The product of PEMFC produces electrical energy, hot steam (313 – 353 K), and water. These conditions have an impact on the degraded bipolar plate caused by the acidic nafion membrane. This increases the risk of corrosion on the cathode side of the bipolar plate. Coating with a green inhibitor using the electrophoretic deposition technique (EPD) is one way to deal with the corrosion that occurs. The analysis method used electrochemical with potentiodynamic polarization techniques, electrochemistry impedance spectroscopy (EIS), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). In this study, green inhibitor D-galactose was used with a concentration of 0.5 – 1.5 g and an, EPD time of 15 – 45 minutes in 0.5 M sulfuric acid (H2SO4) media pH 1-4. Potentiodynamic polarization analysis at the lowest corrosion current value (Icorr) at demonstrates (the inhibitor concentration of 1.5 g with an and EPD time of 45 minutes) resulted corrosion rate of Al5052 before EPD was 0.0075 mmPY while the corrosion rate of Al5052 after EPD was 0.0041 mmPY with (inhibitors efficiency 45.2%). The FTIR spectrum, broad peak appeared in the range of 3000-3600 cm-1, which refers to the formation of hydrogen bonding of hydroxyl group. Methyl group of D-galactose also appear on 2918 cm-1 and 2850 cm-1 which attributed to =CH2 asymmetric stretch and −CH3 symmetric stretch, respectively. Carbonyl group on 1500 – 1700 cm-1 represent C=O bond of amide, and aldehyde. Peak 1097 – 1035 cm-1 which attributed to C-O were connected to the secondary and primary alcohols. The resistance value for Al5052 before and after EPD are 1.2 kΩ/cm2 after and 2.2 kΩ/cm2, respectively. Here we find that the resistance increases with the increasing concentration and time of EPD. The results cross section Al5052 within average 29.8 μm, and morphology with SEM Al5052 before EPD showed pitting corrosion. On the other hand, the image of Al5052 inhibitor coating 1.5 gr with EPD of 45 minutes shows a smooth surface and visible black lumps, suggesting Al5052 is successfully reduced a corrosion rate by the D-galactose. Our simple and robust method inferred a protection route towards a viable and physically stable green inhibitors.
FAILURE ANALYSIS OF SCREW COMPRESSOR AND ITS MODIFICATIONS Aat Safaat; Alfian Noviyanto
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 3 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.3 KB) | DOI: 10.22441/ijimeam.v3i3.12963

Abstract

Screw compressor is one of critical equipment at many industries. Therefore, its reliability and performance shall be maintained. One problem that often arises with screw compressors is the lubrication system. This study investigates the cause of the screw compressor failure and its modification to prevent failure in the future. The failure analysis of the screw compressor was successfully conducted using the fishbone analysis diagram and visual examination. The presence of water in the oil was found due to a change of oil color. The water content analysis showed that 6% of water was found in the oil in the third month. Indeed, the presence of water has a detrimental effect on the screw compressor part, showing that corrosion has occurred in the inner part of the screw ompressor element. We found the water source comes from the air due to high humidity. Therefore, modification in the air supply is needed to prevent water contamination in the oil. The air supply modification is done using dry air at the screw compressor outlet, flowing into the breather system. The modification results showed that the oil's water content decreased significantly from 6% to 0.0035%. In addition, the vibration that occurs decreases from 80 dB to 58 dB. This shows the effectiveness of the modification process to extend the life of the tool and maintain the plant's operational continuity.
Optimized Synthesis of FeNi/TiO2 Green Nanocatalyst for High-Quality Liquid Fuel Production via Mild Pyrolysis Riny Yolandha Parapat; Muhamad Firmansyah Rizkiawan Putra; Zamaludin Zamaludin; Didin Agustian Permadi; Imam Aschuri; Yuono Yuono; Alfian Noviyanto; Michael Schwarze; Reinhard Schomäcker
Jurnal Kimia Sains dan Aplikasi Vol 26, No 10 (2023): Volume 26 Issue 10 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.10.391-403

Abstract

In sustainable energy improvement, the strategic design of economical nanocatalysts has emerged as a pivotal pathway, notably within intricate processes such as asphalt pyrolysis. This study presents a new endeavor, conceptualizing a non-precious metal nanocatalyst FeNi deposited on TiO2, synthesized through an environmentally conscious green synthesis methodology employing mangosteen peel extract as a sustainable reductant. Asphalt, the most complex compound, is used as the pyrolyzed material to measure the activity of nanocatalysts in mild pyrolysis. In this study, the synthesis of the nanocatalyst and pyrolisis are optimized. The research outcomes reflect a notable work towards efficiency enhancement. Initial investigations showcased the highest values before optimization for nanocatalyst synthesis, oil yield, and calorific value, which are 63.23%, 50.78%, and 10684 cal/g, respectively. However, these values increase significantly after optimization to 68.44%, 53.72%, and 10775 cal/g, respectively. Careful validation endeavors have underscored the closeness, manifesting slight errors of 2.52%, 1.86%, and 0.36% for catalyst yield, oil yield, and calorific value, respectively. This validation features the reliability of the research findings. Intriguingly, the GC-MS analysis establishes compelling parallels in composition between the derived product and conventional diesel fuel. The minimal errors and the analogous composition to diesel fuel present a promising trajectory. The results obtained from this study contribute to the development of greener and more efficient energy production technologies, paving the way for a sustainable and eco-friendly approach to utilizing energy resources.
Synthesis of Polystyrene Fiber Membranes Prepared by Electrospinning: Effect of AgNO3 on the Microstructure Budi, Hanifah Setyaning; Zulfi, Akmal; Setyaningsih, Lia Dwi; Fahroji, Muhammad; Amalia, Ratih; Angel, Julia; Arrosyid, Bagas Haqi; Handika, Gugus; Saputro, Kurniawan Eko; Noviyanto, Alfian; Rezeki, Yulianto Agung
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 1 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i1.84601

Abstract

Polystyrene (PS) is commonly employed in insulation, packaging, filters, and medical equipment, with recent studies exploring its potential in fiber membrane production. The electrospinning technique is discussed to synthesize PS fiber membranes with high porosity and controllable diameter. Additionally, incorporating silver nitrate into PS composite fibers is explored for enhanced functionalities such as catalytic activity, high electrical conductivity, and antibacterial activity. However, PS composite fiber membranes with silver nitrate (AgNO3) metal variations are rarely observed. This research aims to modify the microstructure of PS fiber membranes produced using electrospinning by adding silver nitrate (AgNO3) with varying concentrations. PS-Ag fiber membranes are produced using N,N-dimethylformamide (DMF) solvent, which serves as a solvent and a reducing agent for Ag. The results show that the effect of Ag affected the diameter of the PS-Ag fiber membrane, with an average diameter of around 3.67 - 6.93 micrometers. Degradation occurred in these samples at a strong broadening peak near ~1300 cm-1 until ~1600 cm-1 from the Raman results. The FTIR results show that the wavelength of ~3500 cm-1 indicated the presence of OH. The presence of OH indicates that the PS-Ag fiber membrane has the potential for water filtration application
PENGARUH AMPLITUDO DAN WAKTU SONIKASI TERHADAP PENURUNAN REFLECTION LOSS PADA SINTESIS MATERIAL ABSORBER BERBASIS PASIR BESI BANTEN UNTUK APLIKASI PESAWAT ANTI RADAR Erlina Yustanti; Agung Trisdian; Alfian Noviyanto
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.24310

Abstract

Pada era industri 5.0 kebutuhan akan perangkat elektronik dan teknologi informasi berkembang sangat pesat. Rekayasa material untuk memenuhi kebutuhan pengguna dan perkembangan zaman melibatkan penggunaan gelombang elektromagnetik dari frekuensi rendah hingga ultra tinggi. Gelombang elektromagnetik banyak membantu dalam mendukung teknologi informasi, namun efek radiasi gelombang elektromagnetik sangat mengganggu kesehatan manusia, sehingga perlu dikembangkan bahan penyerap gelombang elektromagnetik. Pada penelitian ini dikembangkan material penyerap gelombang elektromagnetik berbasis muatan lokal pasir besi dari wilayah Banten. Barium heksaferit merupakan salah salah satu kandidat terbaik sebagai bahan baku untuk sintesis material penyerap gelombang mikro. Fe2O3 sebagai bahan baku barium heksaferit yang saat ini masih impor dapat digantikan fungsinya melalui penggunaan pasir besi lokal sebagai sumber Fe melalui teknik kopresipitasi menghasilkan FeCl3. Pada penelitian ini dilakukan kombinasi rekayasa melalui substitusi Mg-Al pada Fe untuk meningkatkan unjuk kinerja material anti radar yang lebih maksimal. Prinsip kopresipitasi pada penelitian ini mencampurkan BaCl2, FeCl3, MgCl2 dan AlCl3 dan diendapkan menggunakan NaOH 4M. Sampel hasil kopresipitasi disinter pada temperatur 1050°C selama 2 jam dilanjutkan sonikasi pada variasi 0, 3, dan 6 jam dengan variasi amplitudo 45 dan 55%. Karakterisasi komposisi unsur penyusun menggunakan XRF, dilanjutkan analisis struktur kristal menggunakan XRD. Ukuran partikel dikarakterisasi menggunakan particle size analyser (PSA) dan unjuk kinerja sebagai material anti radar menggunakan vector network analyzer (VNA). Penelitian ini menghasilkan FeCl3 sebagai bahan baku dengan kemurnian 41,65% menggantikan peran Fe2O3 dalam sintesis barium heksaferit. Material anti radar fase tunggal BaFe11,8Mg0,1Al0,1O19 berhasil disintesis dengan ukuran partikel 151 nm menghasilkan reflection loss -23,39 dB pada sonikasi 6 jam dengan amplitudo 55%. Material cerdas anti radar hasil penelitian ini dapat penyerapan gelombang elektromagnetik hingga 99,50% pada frekuensi X-Band 8-12 GHz.
Studi kelayakan ekonomi budidaya udang Litopenaeus vannamei: investasi nanobubble dalam meningkatkan produktivitas hasil panen Mauladani, Syifa; Rahmawati, Asri Ifani; Absirin, Muhammad Fahrurrozi; Saputra, Rizki Nugraha; Pratama, Aprian Fajar; Hidayatullah, Arief; Dwiarto, Agus; Syarif, Ahmad; Junaedi, Hardi; Cahyadi, Dedi; Saputra, Henry Kasman Hadi; Prabowo, Wendy Tri; Kartamiharja, Ujang Komarudin Asdani; Noviyanto, Alfian; Rochman, Nurul Taufiqu
Jurnal Akuakultur Indonesia Vol. 19 No. 1 (2020): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.468 KB) | DOI: 10.19027/jai.19.1.30-38

Abstract

Tujuan dari penelitian ini adalah untuk menentukan kelayakan ekonomi usaha budidaya udang Litopenaeus vannamei dengan padat tebar 400 ekor/m2 selama 56 hari. Penelitian ini dilakukan pada kolam HDPE berukuran 800 m2 dengan menggunakan nanobubble dan non-nanobubble. Tingkat sintasan udang dan total panen pada kolam nanobubble berturut-turut meningkat mencapai 92% dan 2.255 kg. Parameter ekonomi yang dihitung terdiri dari Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), Break Even Point (BEP), Benefit Cost Ratio (B/C Ratio), dan Sensitivity Analysis (SA). Biaya investasi total yang dibutuhkan untuk budidaya ini yaitu Rp 182.887.700. Pendapatan per siklus diestimasi mencapai Rp 157.850.000 dengan harga jual Rp 70.000 per kg udang. PP diestimasi setelah 4 siklus dengan NPV Rp 172.329.247 diproyeksikan setelah 10 siklus. Nilai IRR diestimasi sebesar 18% dan BEP diraih setelah produksi udang mencapai 7.058 kg. Rasio B/C diestimasi sebesar 1,26 dan SA menunjukkan bahwa produktivitas merupakan parameter yang paling berpengaruh dalam analisis ini. Berdasarkan hasil studi, budidaya udang menggunakan nanobubble layak diberi investasi.
Pengaruh Variasi Densitas Resin PVC terhadap Koefisien Gesek dan Mikrostruktur Komposit Kampas Rem Berbasis Serat Sabut Kelapa dan Serbuk Arang Pandriana, Aap; Alva, Sagir; Noviyanto, Alfian; Kurniawan, Kurniawan
Jurnal Rekayasa Energi dan Mekanika Vol 5, No 1 (2025): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v5i1.50

Abstract

Penelitian ini bertujuan mengembangkan kampas rem ramah lingkungan berbahan komposit dengan menggunakan serat sabut kelapa sebagai penguat, serbuk arang batok kelapa sebagai pengisi, dan resin polivinil klorida (PVC) sebagai matriks. Proses pembuatan komposit dilakukan melalui metode hot press pada suhu 180 °C dan tekanan 7 MPa. Variasi resin PVC diperoleh dari perbedaan rasio pelarut cyclohexanone terhadap serbuk PVC, yaitu G01 (1,036 g/ml), G02 (1,069 g/ml), dan G03 (1,136 g/ml). Pengujian yang dilakukan meliputi pengukuran massa jenis, koefisien gesek, serta pengamatan struktur mikro menggunakan mikroskop optik. Hasil menunjukkan bahwa meningkatnya densitas resin sebanding dengan peningkatan massa jenis dan nilai koefisien gesek komposit. Spesimen G03 dengan densitas resin tertinggi menghasilkan nilai koefisien gesek tertinggi, yaitu 0,19. Hal ini menunjukkan bahwa kekuatan ikatan antar material semakin baik seiring peningkatan kandungan resin. Pengamatan struktur mikro memperlihatkan bahwa resin PVC lebih merata dan menyelimuti serat dengan lebih baik pada spesimen G03, yang mengindikasikan distribusi material yang lebih homogen dan ikatan antar fase yang lebih kuat. Hasil pengujian menunjukkan bahwa koefisien gesek meningkat seiring dengan peningkatan kandungan resin dan spesimen komposit G03 masuk dalam standar SAE J661-1997. (0,14–0,27), kondisi ini diduga disebabkan oleh pengujian yang dilakukan pada temperatur rendah. Secara keseluruhan, komposit ini memiliki potensi untuk digunakan sebagai kampas rem non-asbes yang aman, ringan, dan memiliki sifat mekanik serta mikrostruktur yang mendukung performa pengereman yang baik.
Unraveling the Density and Hardness of Sintered Hydroxyapatite: A Conclusive Comparison of Laboratory-Synthesized Versus Commercial Variants Ramdhani, Rizal Fauzuddin Noor; Arrosyid, Bagas Haqi; Noviyanto, Alfian
Jurnal Kimia Sains dan Aplikasi Vol 28, No 3 (2025): Volume 28 Issue 3 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.3.130-137

Abstract

Hydroxyapatite (HA) is a bioceramic widely utilized in the medical field as a substitute for bone and dental applications. The mechanical properties of HA are influenced by its microstructure, which varies based on the source of the material, whether it is commercially acquired or laboratory-synthesized. This study aims to investigate and compare the properties of commercially available HA with those of laboratory-synthesized HA, as well as their mixtures, focusing on density and hardness. To conduct this investigation, both laboratory-synthesized and commercial HA were sintered at temperatures of 800°C, 900°C, 1000°C, and 1100°C for a duration of two hours. Additionally, various mixtures of the two sources of HA were prepared in weight percent ratios of 0:100, 30:70, 50:50, 70:30, and 100:0 using a planetary ball mill, also for two hours. The density of sintered HA was determined using Archimedes’ principle, while its hardness was evaluated using a Vickers hardness tester. The findings revealed that laboratory-synthesized HA sintered at 1100°C exhibited the highest density and hardness, measuring 3.15 g/cm3 and 488.9 MPa, respectively. This superior performance can be attributed to the smaller particle size of the laboratory-synthesized HA, which enhances densification. The dense structure of the laboratory-synthesized HA results in reduced porosity and smaller grain sizes, as evidenced by scanning electron microscopy images. In contrast, the commercial HA achieved a density of only 3.00 g/cm3 at the same sintering temperature of 1100°C, attributable to poorer densification and a resultant porous microstructure. Notably, the mixture of commercial and laboratory-synthesized HA at a ratio of 30:70 demonstrated properties closely aligned with those of pure laboratory-synthesized HA, achieving a density of 3.14 g/cm3 and a hardness of 477.3 MPa. These results underscore the importance of source material and processing conditions in determining the mechanical properties of hydroxyapatite.
A Review : The Effect of Nanoparticles in Vegetable Oil on Surface Roughness in Machining Processes Pratiwi, Ayu; Noviyanto, Alfian
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 15, No 01 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v15i01.36830

Abstract

The use of mineral oil based and synthetic coolants in machining processes remains dominant, despite their negative impacts on the environment and occupational health. Vegetable oils have emerged as an environment friendly alternative due to their biodegradable, non toxic properties, and renewable sources. However, thermal and tribological limitations restrict their performance under extreme conditions. To address this, various studies have investigated the addition of nanoparticles to vegetable oils to form nanofluids with improved lubrication and cooling performance. Nanoparticles such as aluminum oxide (Al₂O₃), molybdenum disulfide (MoS₂), and graphene have been shown to enhance thermal conductivity, reduce friction, and form protective tribological layers. This literature review discusses the effect of the combination of vegetable oil and nanoparticles on surface roughness in machining processes. The results show that nanofluids can significantly reduce surface roughness, particularly in Minimum Quantity Lubrication (MQL) systems. The effectiveness of nanofluids is greatly influenced by the type, size, and concentration of nanoparticles, where the optimal concentration varies but remains within a certain range (e.g., 2.5% for Al₂O₃). This study emphasizes that the development of plant-based nanofluids is a strategic approach toward efficient, environment friendly, and sustainable machining.
Co-Authors Aat Safaat Absirin, Muhammad Fahrurrozi Aga Ridhova Agung Trisdian Agus Sukarto Wismogroho Agus Sukarto Wismogroho Agus Sukarto Wismogroho, Agus Sukarto Ahmad Syarif Amal, Muhamad Ikhlasul Amalia, Ratih Amirudin Wibowo Angel, Julia Arif Tjahjono Arramel Arramel Arrosyid, Bagas Haqi Ayu Pratiwi, Ayu Budi, Hanifah Setyaning Dedi Cahyadi Desrilia Nursyifaulkhair Didik Aryanto Didik Aryanto Didin Agustian Permadi Dwiarto, Agus Erlina Yustanti Fahroji, Muhammad Faras Afifah Fiqhi Fauzi H. Hakim Handika, Gugus Hardi Junaedi HIDAYATULLAH, ARIEF Huda, Ihsanul I. G. A. Arwati Ihsanul Huda Imam Aschuri Iwan Setiawan Kartamiharja, Ujang Komarudin Asdani Kurniawan Kurniawan Leanddas Nurdiwijayanto Mauladani, Syifa Mi'raj Shabrin Jamil Michael Schwarze Muhajirin Muhajirin Muhamad Firmansyah Rizkiawan Putra Nishimura, Toshiyuki Nurul Taufiqu Rochman Nurul Taufiqu Rochman Nurul Taufiqu Rochman Nurul Taufiqu Rochman Nurul Taufiqu Rochman Pandriana, Aap Pipit Fitriani Prabowo, Wendy Tri Pramitha Yuniar Diah Maulida Pratama, Aprian Fajar Rahmawati, Asri Ifani Ramdhani, Rizal Fauzuddin Noor Reinhard Schomäcker Retno Kusumaningrum Riny Yolandha Parapat S. Hartati Sagir Alva Saputra, Henry Kasmanhadi Saputra, Rizki Nugraha Saputro, Kurniawan Eko Setyaningsih, Lia Dwi Sri Harjanto Sukmarani, Galuh Sulthoni Akbar T. Zakly Toto Sudiro Wahyu Bambang Widayatno Wahyu Bambang Widayatno, Wahyu Bambang Wisnu Ari Adi Yulianto Agung Rezeki Yuono Yuono Zamaludin Zamaludin Zulfi, Akmal