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All Journal JURNAL FISIKA JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX INDONESIAN JOURNAL OF APPLIED PHYSICS Journal of Applied Sciences and Advanced Technology JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Utiya Hikmah
Program Studi Fisika, Fakultas Sains Dan Teknologi, Universitas Islam Negeri Maulana Malik Ibrahim
Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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Analysis of Tensile Strength of Jute and Coconut Coir Reinforced Polymer Matrix Composite Berliana Maulani Naziha; Putri Ayu Nurmakhmuda; Utiya Hikmah
Journal of Applied Sciences and Advanced Technology Vol 5, No 1 (2022): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.1.1-6

Abstract

A Composite is a mixture of two or more elements that are physicochemical and different from one another which can produce new products with better properties. As technology advances, conventional composite materials began to be replaced with polymer materials. One way of making polymer composites is to use polyester resin with natural fiber reinforcement. Coconut coir is a natural fiber with a high cellulose content and can produce high lignin is the cause of coconut coir having stiffer properties than other natural fibers. It is this rigid nature that causes coconut coir to be widely ogled by the textile industry. Another example that is often used as a reinforcement for polymer composites is jute fiber. Jute fiber is a natural fiber with high quality derived from the extraction of plant stems with a multicellular structure. This research is about measuring the tensile test of composites with a polyester resin matrix reinforced by jute and coconut fiber.
ANALISIS SIFAT MEKANIK LIST GYPSUM BERBASIS SERAT RAMI Irvan Wahyubil Rizki; Adhea Yunita Sari; Utiya Hikmah
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 2 (2023): JOP (Journal Online of Physics) Vol 8 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan penelitian pembuatan komposit list gypsum dengan serat rami sebagai filler. Penelitian ini bertujuan untuk mengetahui sifat uji mekanik dari list gypsum dengan filler berupa serat rami, dengan variasi komposisi campuran serat rami dan list gypsum yaitu A= 0%:100%, B= 2%: 98%, C= 4%:96%, dan D= 6%:94%, dengan nilai FAS (Faktor Air Semen) 0,5. Proses pembuatan sampel list gypsum menggunakan cetakan standar UTM dengan waktu pengeringan selama 5 hari. Sampel yang telah jadi selanjutnya dilakukan uji menggunakan UTM (Universal Tensile Machine) untuk mengetahui kuat patah dan regangan pada sampel. Dari hasil pengujian menunjukkan bahwa list gypsum berbahan serat rami memiliki nilai kuat patah sebesar 12.720 - 28.160 kgf/cm2. Nilai kuat patah yang diperoleh ini tidak kurang dari minimal nilai standar mutu papan serat pada SNI 01-4449-2006 yaitu sebesar 20.0 kgf/cm2. Untuk mengetahui perubahan panjang pada sampel saat diberi gaya tarik, telah dilakukan analisis regangan yang terjadi pada sampel dan diketahui bahwa list gypsum berbahan serat rami memiliki nilai regangan sebesar 0.558 mm - 1.175 mm.
Analisis Sifat Mekanis Komposit Matriks Polyester dengan Penguat Cangkang Kerang Hijau Ayu Ariska, Lambang Putri; Sahlan, Mohammad Agus; Hikmah, Utiya
Jurnal Fisika Vol 13, No 1 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v13i1.38835

Abstract

Sebagai upaya pemanfaatan potensi limbah cangkang kerang hijau (Perna Viridis L.), cangkang kerang hijau dapat dimanfaatkan sebagai penguat (filler) pada komposit dengan matriks polyester. Tujuan dari penelitian ini yaitu untuk menganalisis sifat mekanis komposit matriks polyester dengan filler cangkang kerang hijau. Pada penelitian ini digunakan beberapa bahan matriks berupa Resin Polyester dan Methyl Ethyl Keton Peroxide (MEKP) yang berfungsi sebagai katalis. Sampel yang telah dibuat selanjutnya akan dilakukan karakterisasi uji tarik menggunakan mesin UTM (Universal Tensile Machine). Pengujian tarik terhadap komposit ini dilakukan untuk mengetahui kekuatan tarik matriks polimer dengan penguat cangkang kerang hijau. Penelitian kali ini menggunakan partikel cangkang kerang hijau berukuran 100 mesh, kemudian variasi fraksi volume filler yang digunakan yaitu 0%, 10%, 20% dan 30%. Metode hand lay up yang digunakan dalam pembuatan material komposit ini. Diperoleh data hasil penelitian dengan nilai kekuatan tarik tertinggi terdapat pada variasi fraksi volume filler 10%  dengan nilai sebesar 18,49 MPa.
Synthesis of Material Composite rGO-TIO2 From Coconut Shells by Sol-Gel Methods as Photocatalyst Utiya Hikmah; Diah Risma Yanti; David Lee Giant Axala
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.77714

Abstract

The rGO- TiO2 composite photocatalyst is receiving great attention because of its high performance. But the study of rGO- TiO2 composite with sources of rGO material derived from the utilization of organic waste such as coconut shells is limited. In this study, the synthesis of nanocomposite rGO- TiO2 was described with rGO obtained from coconut shells. The rGO samples produce through the oxidation and reduction process. The transformation of graphene oxide into reduced graphene oxide was assisted by microwave irradiation. The obtained rGO was then composite with Titanium tetraisopropoxide (TTIP) by the sol-gel method. The composite of rGO- TiO2 was characterized by XRD, FTIR, UV-Vis, and SEM. The photocatalytic performance of the rGO- TiO2 composite was conducted on Methylene blue. The result shows that rGO- TiO2composite has a good photocatalytic performance with the highest number at 96%.
Crystal Structure Parameter Analysis of Reduced Graphene Oxide (rGO) from Coconut Shell Charcoal Hikmah, Utiya; Azizah, Aghea Tahta Wahyu; Hastuti, Erna
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 2 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i2.17135

Abstract

In this research, reduced graphene oxide (rGO) material from coconut shell charcoal was synthesized using the modified Hummer method. The reduction process of Graphene Oxide (GO) to rGO uses the reducing agent L-Ascorbic Acid (LAA) and is assisted by microwave radiation. The samples obtained were then characterized using XRD to analyze the crystal structure parameters of the rGO samples obtained. Based on the XRD results, the data obtained was then analyzed using the Scherrer and modified Scherrer equations to determine the crystal size in the sample. In addition, the Williamson-Hall equation is also used to analyze crystal size and lattice strain. This article also analyzes XRD data using the Rietveld method using Rietica software. The output from the Rietica software obtained lattice parameter values a ≠ b ≠ c and angle α = β = γ = 90° which indicates an orthorhombic crystal lattice structure. In the refinement process, Rietica's software affects the suitability parameters in the form of R and GOF indicator values. The sample obtained was also measured for the electrical conductivity value of the rGO sample using an LCR meter.
Pengaruh Variasi Fraksi Volume Filler Terhadap Sifat Mekanik pada Komposit Polyester Berpenguat Serat Pelepah Pisang Rosmawati, Erlina; Apsarini, Syarifatunnisa Eka; Hikmah, Utiya; Nayiroh, Nurun
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 9 No. 1 (2025): May Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/mvexk077

Abstract

The purpose of this study is to ascertain how changes in the volume proportion of banana stems affect the composite's mechanical characteristics and microscopic structure.  Banana stem fibre served as a natural reinforcement in this investigation together with a polyester matrix.  The selection of banana stem fibre was based on its broad availability and possible mechanism.  The hands lay-up approach is used in this study.  The volume proportion of banana stem fibre was varied from 0% to 25% in order to mould each sample into a composite.  A two-hour alkalisation treatment with 5% NaOH was applied to banana stem fibre. A Universal Testing Machine (UTM) was used to assess the samples' tensile strength, and an optical microscope was used to examine their microstructure.  According to the study's findings, the tensile strength values of composites with volume fractions of 0%, 10%, 15%, 20%, and 25% were 5.9 Mpa, 11.9 Mpa, 8.9 Mpa, and 7.9 Mpa, respectively.  It is evident that the sample with the best tensile stress value, 11.9 Mpa, has a 15% banana stem volume fraction.
Co-Authors Adhea Yunita Sari Apsarini, Syarifatunnisa Eka Ayu Ariska, Lambang Putri Azizah, Aghea Tahta Wahyu Berliana Maulani Naziha David Lee Giant Axala Diah Risma Yanti Erna Hastuti Irvan Wahyubil Rizki Nayiroh, Nurun Putri Ayu Nurmakhmuda Rosmawati, Erlina Sahlan, Mohammad Agus