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All Journal Rekayasa Mesin JMM (Jurnal Masyarakat Mandiri) Jurnal Polimesin
Musyaroh, Musyaroh
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Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Efek Intermolecular Forces: Perubahan Physical Properties pada Campuran Premium dan Bio-Additive Orange Peel Musyaroh, Musyaroh; Wijayanti, Widya; Sasongko, Mega Nur; Rizaldy, Ahmad Difal
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.15

Abstract

The addition of bio-additive in gasoline was needed in order to improve the anti-knock quality. The bio-additive used was orange peel in the form of essential oil. Nevertheless, it make any changes of fuel properties affecting standard compliances: physical properties, engine performances and exhaust gas emissions due to some main compound effects of orange oil; limonene up to 90%. The recent study aimed to analyze the blends of bio-additives and premium gasoline  experimentally related to improve the fuel properties theoretically. By verifying the blends, they were tested at blending concentration ratio from 1% to 75%. For each blend, the physical properties; kinematic viscosity, density, and calorific value were measured using ASTM D 445, ASTM D 92, and ASTM D 250.  The results show that the limonene gave many impacts on the change of properties fuel. Limonene is a non-polar compound with high intramolecular force intensity. It causes a spontaneous dipole and gave propagation effect on premium gasoline molecular compound. The effect influences dynamic molecular distribution by increasing the attractive force between opposite pole of premium gasoline and bio-additives blend. The decrease of intermolecular movement intensity will decrease the viscosity of the mixture. In contrary, the kinematic viscosity of the mixture will increase with increasing bio-additive concentration. In other pysical properties, the premium gasoline-bio-additive blends have low density at 1%, 5%, 10% and 25% addition concentration but it has high heating value of fuel blends.
PEMANFAATAN SAMPAH ORGANIK RUMAH TANGGA SEBAGAI PUPUK ORGANIK BERNUTRISI MENGGUNAKAN ALAT COPPER MANUAL DENGAN METODE VERMICOMPOST Fatkhurrohman, Fatkhurrohman; Zunairoh, Zunairoh; Ruviana, Rizqa; Musyaroh, Musyaroh; Izzah, Anisah Nurul
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 3 (2025): Juni
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i3.31510

Abstract

Abstrak: Kota Surabaya memiliki jumlah penduduk 2,9 juta jiwa dan terus mengalami peningkatan setiap tahunnya. Sejalan dengan hal tersebut, volume sampah yang dihasilkan mencapai 2.913 ton perhari. Oleh karena itu, diperlukan adanya pemanfaatan dari sampah guna mengurangi volume sampah yang setiap tahunnya mengalami peningkatan. Salah satu upaya yang bisa dilakukan yaitu dengan memanfaatkan sampah menjadi pupuk organik bernutrisi. Tujuan penyuluhan yaitu memberikan wawasan bagaimana memanfaatkan sampah organik rumah tangga menjadi pupuk organik bernutrisi dengan metode vermicompost. Metode pelaksanaan dilakukan dengan penyuluhan secara langsung didepan warga Kelurahan Medokan Semampir Kota Surabaya yang dihadiri sebanyak 30 orang. Evaluasi dilakukan menggunakan pre test dan post test berkaitan dengan pengetahuan dan pemahaman terhadap proses pembuatan pupuk organik menggunakan copper manual dengan metode vermicompost. Hasil pre test dan post test menunjukkan peningkatan pengetahuan dan pemahaman warga sebesar 71% menjadi 97%. Diharapkan dengan adanya kegiatan ini warga dapat memanfaatkan sampah organik rumah tangga sehingga dapat mengurangi volume sampah di Kota Surabaya.Abstract: The city of Surabaya has a population of 2.9 million people and continues to increase every year. In line with this, the volume of waste produced reaches 2,913 tons daily. Therefore, it is necessary to utilize waste to reduce the volume of waste which increases every year. One effort that can be made is to utilize waste into nutritious organic fertilizer. The purpose of the counseling is to provide insight into how to utilize household organic waste into nutritious organic fertilizer using the vermicompost method. The implementation method is direct counseling in front of residents of Medokan Semampir Village, Surabaya City, which was attended by 30 people. The evaluation was carried out using a pre-test and post-test related to insight and understanding of the process of making organic fertilizer using manual copper with the vermicompost method. The results of the pre-test and post-test showed an increase in residents' insight and understanding 75% to 97%. It is hoped that with this activity, residents can utilize household organic waste so that they can reduce the volume of waste in the city of Surabaya.
Investigation on hardness and microstructural behavior of mahogany–brass reinforced bio-composite brake pads under varying compaction pressure Fatkhurrohman, Fatkhurrohman; Ruviana, Rizqa; Musyaroh, Musyaroh; Izzah, Anisah Nurul
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8593

Abstract

The gradual elimination of asbestos in brake pad manufacturing has intensified the search for sustainable and non-toxic friction materials. This study presents waste-based bio-composite brake pads reinforced with mahogany sawdust and brass shavings, fabricated using a compaction-sintering approach. The scientific novelty of this study lies in the combined influence of reinforcement composition and compaction pressure on the microstructure-hardness relationship of wood-metal hybrid composites for brake pad applications. The effects of varying mahogany-to-brass ratio and compaction pressure on Shore D hardness and morphological characteristics were systematically evaluated. The results showed that increasing compaction pressure and reinforcement proportion improved composite densification and interfacial bonding, thereby increasing hardness. Increased hardness indicates better structural integrity and load-bearing capacity, which are important mechanical requirements for brake pad materials. The highest hardness value of 76.6 Shore D was obtained at a pressure of 3400 psi with a 4:4 composition, while the lowest value of 70.6 Shore D occurred at 3000 psi with a 1:4 ratio. These findings highlight the role of controlled compaction and balanced hybrid reinforcement in tailoring the mechanical characteristics of sustainable brake pad composites, supporting the potential utilization of wood and metal waste as environmentally friendly friction material components.
Co-Authors Anisah Nurul Izzah Fatkhurrohman Fatkhurrohman, Fatkhurrohman Mega Nur Sasongko Rizaldy, Ahmad Difal Rizqa Ruviana Widya Wijayanti Zunairoh, Zunairoh