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Jurnal Rekayasa Material, Manufaktur & Energi
Published by Universitas Muhammadiyah Sumatera Utara
ISSN : 26227398     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Rekayasa Material, Manufaktur & Energi, yang diterbitkan oleh Fakultas Teknik, Program Studi Teknik Mesin, Universitas Muhammadiyah Sumatera Utara (UMSU), Medan, Sumatera Utara, Indonesia, Jurnal Rekayasa Material, Manufaktur & Energi menerima artikel ilmiah hasil-hasil penelitian, dan eksperimen, yang mencakup pada bidang Rekayasa Material, Manufaktur dan Energi, Mesin, dan ilmu yang relevan pada sektor terkait.
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Articles 230 Documents
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Pemanfaatan Ekstrak Spirulina Platens Sebagai Bio-Material Kamuflase Multifungsi Untuk Samaran TNI Yang Melindungi Kulit Dari Radiasi, Panas, Dan Kondisi Lingkungan Ekstrem Azza, Athira; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.17083

Abstract

Spirulina platensis is a species of microalgae from the cyanobacteria group known for its high nutritional value and extensive health benefits. This microalgae is spiral or helical in shape and bluish green in color due to its phycocyanin content, a protein pigment that also has antioxidant properties. Spirulina platensis is often used as a food supplement because of its high protein content, reaching 50-70%, and contains vitamins, minerals, and essential fatty acids that support health. This study developed a peel-off gel mask from Spirulina platensis extract with Polyvinyl Alcohol (PVA) and Hydroxypropyl Methylcellulose (DMC) as gelling agents in various compositions. Formulas with a ratio of PVA 2.25%: DMC 1.25% (formula A) and PVA 2.00%: DMC 1.05% (formula B) showed good physical stability, including pH close to skin pH, viscosity, and ideal drying time. These results show the potential of Spirulina platensis as a multifunctional camouflage material that can protect the skin from UV radiation and extreme environmental conditions.
Karakterisasi Dan Aktivitas Fotokatalitik Green Synthesized Nanokomposit Fe3O4/TiO2 Menggunakan Ekstrak Daun Kelor Untuk Degradasi Methylene Blue Br Situmorang, Dinda Agelia; Lubis, Ridwan Yusuf; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21753

Abstract

This research focuses on Fe3O4/TiO2 nanocomposites (produced through green synthesis) using moringa leaf extract to degrade methylene blue. The coprecipitation synthesis method was successfully employed to synthesize Fe3O4/TiO2. The aim of this study is to evaluate the effects of characterization results and photocatalytic activity on morphological structure, crystal size, and methylene blue degradation percentage. To assess these parameters, the study compared different mass composition ratios: 2:1, 1:1, and 1:2. The samples were characterized using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and UV-Vis Spectrophotometry.SEM results indicated that agglomeration occurred in the 1:2 mass ratio variation. XRD analysis showed that as the mass ratio increased, the crystal size decreased, with crystal sizes recorded at 30.71 nm, 28.38 nm, and 28.59 nm. UV-Vis results demonstrated that higher mass ratios corresponded to higher degradation percentages, reaching up to 97.80% for the FTMO1:2 sample.
PENGARUH KARBON AKTIF DAN SODIUM ALGINAT TERHADAP PENURUNAN KADAR GLIFOSAT TANAH TERCEMAR RESIDU PESTISIDA Sucitawati, Nopita; Daulay, Abdul Halim; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21507

Abstract

The widespread use of pesticides has led to soil contamination, one of which is caused by glyphosate residues. This study aims to examine the influence of activated carbon and sodium alginate on reducing glyphosate levels in contaminated soil. Various compositions of coconut shell-based activated carbon and sodium alginate were applied to soil samples to determine the effectiveness of glyphosate reduction. The results showed that the combination of these two materials significantly contributed to lowering glyphosate levels. Surface morphology characterization of the activated carbon using Scanning Electron Microscope (SEM) revealed that the pores and surface structure of the activated carbon play a crucial role in glyphosate adsorption. Activated carbon samples with sodium alginate variations demonstrated increased efficiency in pesticide residue absorption, particularly in samples with ratios of 100%:0%, 90%:10%, and 80%:20%. These findings confirm that activated carbon and sodium alginate are effective in reducing glyphosate levels, with the activated carbon’s morphology supporting optimal adsorption.
Karakterisasi Arang Karbon Hasil Pirolisis Limbah Kulit Pinang Dengan Dan Tanpa Ethanol Sebagai Aktivator Peday, Harold Thijs Nadyo; Sialana, Jufri; Mini, Marthina; Nanlohy, Hendry Y
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21862

Abstract

Activated carbon is a crucial material widely used in various applications, including water purification and waste treatment. Areca nut husk, often regarded as waste, shows great potential as an alternative raw material for activated carbon. This study aims to characterize the structure and chemical properties of activated carbon derived from areca husk waste through an ethanol activation process. The activation process was conducted to enhance the porosity and surface area of the activated carbon, thereby increasing its adsorption capacity. Microstructure observations, XRD, TGA, and FTIR analyses were conducted to evaluate the quality of the activated carbon. The results showed that activated carbon with activation has a more complex pore structure, higher crystallinity, and additional functional group such as hydroxyl, which improve adsorption capacity and thermal stability. This study demonstrates that ethanol-activated areca husk has significant potential for various environmental and industrial applications.
Tinjauan Material High-Performance sebagai Nosel Roket: Nickel Superalloy, Refractory Metals, CMCs, dan C-C Composites Setyanjana, Andre Yoan; Yogaswara, Y. H; Marsono, Marsono; Junjunan, Soleh Fajar
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.20385

Abstract

The advancement of rocket propulsion technology relies heavily on the development and optimization of high-performance materials capable of withstanding the extreme conditions inside rocket nozzles. This review comprehensively discusses four major material classes for rocket nozzles: Nickel-Based Superalloys, Refractory Metals, Ceramic Matrix Composites (CMCs), and Carbon-Carbon (C-C) Composites. This review highlights the unique properties, advantages, and limitations of each material in rocket nozzle applications using the Systematic Literature Review research method. Nickel-Based Superalloys are renowned for their outstanding high-temperature strength and oxidation resistance, but face challenges in terms of density and cost, thus requiring improvements in composition and processing techniques. Refractory Metals such as tungsten, molybdenum, and tantalum have very high melting points and thermal conductivity, but brittleness and oxidation at high temperatures are major constraints, requiring further research into coatings and alloying strategies. CMCs, mainly based on silicon carbide (SiC), offer high thermal stability, low density, and resistance to thermal shock. However, CMCs materials are also prone to oxidation at high temperatures and rely heavily on fiber-matrix interactions, requiring exploration of manufacturing methods for structural integrity under dynamic thermal loads. Whereas, C-C Composites excel in thermal resistance and light weight, ideal for nozzle throats and exit cones, they are prone to oxidation, requiring protective coatings and treatments to enhance their longevity in oxidative environments.
Pembuatan Alat Pelipat Baju Otomatis Berbasis Arduino Uno Untuk UMKM Laundry Umurani, Khairul; Rahmatullah, Rahmatullah; Muharnif, M.; Asfiati, Sri; Sandi, Didik Mei
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.22371

Abstract

Laundry workers are required to be able to fold quite a lot of clothes in a fairly short time and neatly. Based on this, an innovation is needed in terms of folding clothes that can help household chores and the UMKM scale laundry industry in terms of folding clothes. The main aim of the research is to create an Arduino-based automatic clothes folding device. Arduino Uno is a microcontroller that is often used in making prototypes of electronic circuits which are useful for making things easier for users. Making an Arduino-based module requires a circuit schematic which is useful for making things easier when making tools. Electronic circuit schematics are needed as a guide in making electronic circuits. The electronic circuit schematic should be designed or drafted first before carrying out the process of making the electronic circuit. Testing of this servo motor is carried out by starting the rotation of the servo motor from an angle of 0⁰ to a rotation of 180⁰. The test results can be concluded that the three servo motors used are in good condition. Having an automatic clothes folding tool can help with daily housework and help laundry entrepreneurs in folding clothes neatly, saving time and energy. The time required to fold a short-sleeved t-shirt is 3.56 seconds and a short-sleeved shirt is 3.66 seconds
Modifikasi Jubah Tembus Pandang Militer Dengan Memanfaatkan Material Kristal Anisotropik (Kalsit [CaCO3]) Talalu, Lidya Ananda; Sianipar, Alexcandro Hibertus; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21906

Abstract

The need for camouflage technology in the military is becoming increasingly urgent due to advancements in technology. Particularly in disguise operations, more sophisticated efforts are required to assist military personnel. Replacing facial camouflage gel with cloaks is considered more efficient as it can cover larger portions of soldiers' bodies. Therefore, an invisible cloak is developed utilizing anisotropic crystal materials, specifically calcite crystals (CaCO3), which work through light reflection to make the cloak's wearer appear invisible when light reflects off the cloak. With the help of transformational optics, this invisible cloak operates by bending the light wave paths around the object to be concealed.
Karakterisasi Dan Kapasitansi Elektroda Karbon Aktif Tempurung Kemiri Dengan Variasi Aktivator Asam Fosfat (H3po4) Cahyani, Rahmatika Fitri; Nasution, Nazaruddin; Lubis, Ridwan Yusuf
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.19474

Abstract

This research aims to determine the quality of activated carbon used as capacitor electrodes. This research used the basic ingredients of candlenut shells taken at the petalni kemiri walrgal village of Balru Laldalng Balmbu Village. The samples were then tested to determine the effect of varying activator concentration of phosphoric acid (H3PO4) on the characterization and capacitance values in making activated carbon capacitor electrodes. This research was carried out in three stages, namely carbonization, activation and dehydration. The carbonization process at a temperature of 700oC, 90 minutes and chemical activation uses varying concentrations for samples A, B and C, namely 5%, 10% and 15%. The addition of the H3PO4 activator had an influence on the morphological structure of the activated carbon which was tested using SEM, functional groups using the FTIR test and surface area using the Methylen Blue method with UV-Vis as well as the capacitance value of the supercapacitor electrode made with activated carbon and tested with a digital multimeter. The resulting pore diameters were 3.572 µm, 3.894 µm, and 2.7549 µm respectively, with the functional groups O-H, C ≡ N, C ≡ C, and C – Br, and the pore surface area of activated carbon was 16.6018m2/g , 16.8808 m2/g and 16.3050 m2/g. The capacitance values of the candlenut shell activated carbon capacitor electrodes produced were 527.1 µF, 784.1 µF, and 497.4 µF. So the most optimal activated carbon sample is sample B with a 10% H3PO4 variation.
Studi Pembuatan Material Komposit Tahan Lentur dari Serat Ampas Tebu yang Digiling Halus untuk Komponen Automotif Nusyirwan, Nusyirwan; Hizhar, Yul; Malik, Adam
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21870

Abstract

Composite material is one of the materials widely used in the field of construction engineering as a candidate for replacing metal materials. The advantages of this material include its low mass, ease of shape, and moisture resistance. However, this material still has many disadvantages, including low bending stress and easy to crack. Utilisation of waste materials such as bagasse which is worthless is one of the things that is very valuable, in this study we use it to be utilized as a high-value composite material to be used as the main material for making composite polymer materials in the field of engineering such as vehicles and ship hulls. In this study, we studied the flexural strength of composite materials from finely ground sugarcane fibre. From the test results, it is known that the flexural strength of the test material shows an increase in the variable of adding finely ground sugarcane fibre, the flexural strength increases from 10% to 20%, and after 20% the flexural stress value tends to decrease. The maximum flexural stress value was obtained with a mixture of finely ground sugarcane fibre with a percentage of 20% with a flexural stress value of 102.32 MPa, this value can increase the maximum flexural stress value of pure polyester by 42.52 MPa, showing an increase of 249.63%.
Karakteristik Penyalaan Droplet Minyak Kelapa Dengan Campuran Biokatalis Karbon Aktif Kulit Pinang Walintukan, Akbar Vicky V; Riupassa, Helen; Nanlohy, Hendry Yoshua
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21756

Abstract

This study aims to reveal the combustion characteristics of coconut oil as an alternative fuel by adding active bio-carbon catalysts from areca nut skin. 1-3 ppm catalysts reduce viscosity, so the fuel quickly absorbs heat and ignites. This study uses the www droplet ignition method to increase the contact area between air and fuel so that the reactivity of fuel molecules increases. The results showed that adding areca nut skin-activated carbon catalysts improved fuel performance, whereas coconut oil fuel can absorb heat and release energy quickly. This was clarified from the results of the TGA test, where when compared with a mixture of 1 to 3 ppm, it was seen that the mix of coconut oil with a two ppm catalyst was the most effective because it had a high temperature with a stable heat flow. These results indicate that activated carbon from areca nut skin has excellent potential to be used as a biocatalyst for environmentally friendly and economical vegetable oil.

Page 19 of 23 | Total Record : 230

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