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All Journal Jurnal Teknik Kimia USU Jurnal Teknik Kimia USU Journal of Community Services in Sustainability JURNAL REKAYASA KIMIA & LINGKUNGAN
Nisa, Khadijah Sayyidatun
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Perbaikan Kualitas Produksi dengan Metode Failure Mode and Effect Analysis (FMEA) di PT. ABC Nisa, Khadijah Sayyidatun; Melyna, Ella; Maulana, Muhammad Iqbaal; Ridwan, Muhammad Arsyi Arrizqi
Journal of Community Services in Sustainability Vol. 1 No. 1 (2023): Journal of Community Services in Sustainability
Publisher : Politeknik STMI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52330/jocss.v1i1.139

Abstract

PT. ABC merupakan perusahaan yang bergerak di bidang produksi komponen-komponen otomotif. Failure Mode and Effect Analysis (FMEA) merupakan metode yang umum digunakan untuk melakukan pemetaan potensi kegagalan pada mesin. Dengan adanya pemetaan potensi kerusakan mesin, strategi perawatan maupun perbaikan mesin dapat ditentukan. Penyusunan FMEA pada di PT. ABC dilakukan pada 48 peralatan yang terdiri dari 2 unit kompresor, 33 unit injection molding, 2 unit cooling tower, 2 unit water chiller, 2 unit dehumidifier, 1 unit mixer, dan 6 unit crusher. Setiap risiko kegagalan pada peralatan pabrik dianalisis penyebab dan tingkat kegagalannya, kemudian berdasarkan data-data tersebut dilakukan penyusunan strategi preventive maintenance, predictive maintenance, dan breakdown maintenance. Hasil strategi maintenance yang disusun dapat menjadi bahan evaluasi maupun referensi bagi industri dalam menentukan kebijakan terkait maintenance peralatan pabrik. Beberapa strategi maintenance yang dapat dilakukan yakni mencatat laju alir dan tekanan operasi, mengganti motor mesin, serta mengganti dies.
Properties of Recycled Polyethylene Terephthalate (rPET)/Stearic Acid/Green Mussel Shell (GMS) Composite Ariani, Desi Budi; Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Hanifati, Ghina Sabrina
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.45134

Abstract

The increasing accumulation of plastic waste, particularly polyethylene terephthalate (PET), presents significant environmental challenges. This study explores the incorporation of green mussel shell (GMS) as a bio-filler in recycled polyethylene terephthalate (rPET) composites to promote sustainability and circular economy practices. rPET/SA/GMS composites were fabricated using injection molding, with GMS compositions of 0%, 5%, 10%, and 15% and a fixed 1% stearic acid (SA) content as a coupling agent. The effects of GMS on thermal, mechanical, rheological, and morphology properties were analyzed using differential scanning calorimetry (DSC), universal testing machine (UTM), melt flow index (MFI) testing, and scanning electron microscopy (SEM). The results indicate that 10% GMS exhibited the highest melting temperature (249.5C) due to enhanced interfacial interactions, despite a decrease in crystallinity. However, tensile strength decreased significantly at 5% GMS (8.52 MPa) due to weak interfacial bonding, whereas 10% GMS (12.91 MPa) showed slight improvement due to better SA-assisted dispersion. Rheological analysis revealed the highest melt flow rate (162.87 g/10 min) at 5% GMS, but higher GMS concentrations reduced flowability due to increased CaCO content and filler agglomeration. Morphological analysis confirmed that GMS addition increased surface roughness, induced void formation, and disrupted stress transfer, weakening composite integrity. These findings highlight the potential of GMS as a functional bio-filler in rPET composites, emphasizing the need for optimized filler concentration and interfacial modifications to develop sustainable high-performance materials.
Pengaruh Penambahan Bio-filler Serbuk Pelepah Pisang pada Sifat Termal, Reologi, dan Mekanik Komposit Termoplastik Berbasis Polipropilena Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Wedian, Ariya
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.20963

Abstract

This study examines the effect of banana stem powder (SPP) addition on the thermal, rheological, and mechanical properties of polypropylene (PP) composites with the addition of stearic acid. The composites were made with variations of PP:SPP of 100:0%, 98:2%, 96:4%, and 94:6% by weight. Differential Scanning Calorimetry testing showed the highest melting temperature of 165.4°C at 4% SPP, while the highest crystallinity of 42.64% was obtained at 2% SPP. The highest flow rate was obtained at 2% SPP of 8.83 g/10 min, and there was a decrease in the flow rate at 4% and 6% SPP. The tensile strength test results showed a decrease, from 30.10 MPa in pure PP to 23.40 MPa at 2% SPP. The results indicate that SPP can improve the thermal and rheological properties of the composite within certain limits, but excessive addition decreases the mechanical strength.
Pengaruh Penambahan Bio-filler Serbuk Pelepah Pisang pada Sifat Termal, Reologi, dan Mekanik Komposit Termoplastik Berbasis Polipropilena Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Wedian, Ariya
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.20963

Abstract

This study examines the effect of banana stem powder (SPP) addition on the thermal, rheological, and mechanical properties of polypropylene (PP) composites with the addition of stearic acid. The composites were made with variations of PP:SPP of 100:0%, 98:2%, 96:4%, and 94:6% by weight. Differential Scanning Calorimetry testing showed the highest melting temperature of 165.4°C at 4% SPP, while the highest crystallinity of 42.64% was obtained at 2% SPP. The highest flow rate was obtained at 2% SPP of 8.83 g/10 min, and there was a decrease in the flow rate at 4% and 6% SPP. The tensile strength test results showed a decrease, from 30.10 MPa in pure PP to 23.40 MPa at 2% SPP. The results indicate that SPP can improve the thermal and rheological properties of the composite within certain limits, but excessive addition decreases the mechanical strength.
Co-Authors Ariani, Desi Budi Fitria Ika Aryanti Hanifati, Ghina Sabrina Maulana, Muhammad Iqbaal Melyna, Ella Ridwan, Muhammad Arsyi Arrizqi Wedian, Ariya