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All Journal Jurnal Sains dan Seni ITS Jurnal Neutrino : jurnal fisika dan aplikasinya Teknosains: Media Informasi Sains dan Teknologi JOURNAL ONLINE OF PHYSICS JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Fisika dan Terapannya Science Get Journal
Rani, Sefrilita Risqi Adikaning
Universitas Islam Negeri Alauddin Makassar
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Mathematics Physics Other

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STUDI SIFAT MEKANIK KOMPOSIT PEG (POLYETHYLENE GLYCOL) - 4000 PENAMBAHAN 10 WT% SiO2 QUARTZ DARI PASIR ALAM DENGAN MENGGUNAKAN DYNAMIC MECHANICAL ANALYSIS (DMA) Sefrilita Risqi Adikaning Rani
JFT : Jurnal Fisika dan Terapannya Vol 8 No 1 (2021): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i1.21134

Abstract

The mechanical properties of (Polyethylene glycol) PEG4000 +10 wt% SiO2 have been investigated using DMA (Dynamic Mechanical Analysis). SiO2 processed from natural sand was added as much as 10 wt % SiO2 as a filler to the composite and PEG-4000 as a matrix. The results show that the addition of SiO2 filler makes the mechanical properties of the PEG-4000 polymer as a matrix increase when influenced by temperature and frequency including shear modulus (G') and tensile modulus (E'). Composites (PEG4000 + 10wt% SiO2 quartz) are more resistant to tensile loads when viewed from their tensile modulus.
Potensi Pemanfaatan Limbah Tulang Ikan Sunu (Plectropomus Leopardus): Analisis FTIR dan XRF untuk Karakterisasi Serbuk Material Rani, Sefrilita Risqi Adikaning; Ihsan, Ihsan; Asriani, Asriani; Putri, Ananda Anidya
JFT : Jurnal Fisika dan Terapannya Vol 11 No 2 (2024): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i2.52274

Abstract

This study aims to investigate the potential utilization of fish bone waste from Sunu as a material source through characterization analysis using FTIR (Fourier Transform Infrared Spectroscopy) and XRF (X-ray Fluorescence). The results of the FTIR analysis show characteristic peaks indicating the presence of important functional groups such as hydroxyl, phosphate, and carbonate. The presence of calcium phosphate as a major component suggests the potential of this bone powder for biomedical applications, such as the production of bone implants and bioceramic materials. Additionally, the XRF analysis reveals high concentrations of calcium (84.8%) and phosphorus (13.5%), along with other relevant oxides, indicating its potential use as a nutritional supplement and building material. Overall, this study demonstrates that fish bone powder from Sunu holds significant potential for applications in the fields of health, food, and composite materials, while also supporting sustainability in fisheries waste management.
POTENSI KITOSAN DARI CANGKANG INTERNAL CUMI SEBAGAI ADSORBEN LOGAM BERAT TIMBAL (Pb) DI PERAIRAN SUNGAI TALLO SULAWESI SELATAN Fadilla, A. Ainur; Nurrahmi, Sitti; Rani, Sefrilita Risqi Adikaning
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.38100

Abstract

Heavy metal pollution in aquatic environments is one of the serious problems that threaten the health of ecosystems and humans. Various methods have been developed to overcome this pollution, one of which is using natural materials such as chitosan. This study aims to explore the potential of chitosan produced from squid (Loligo sp.) internal shells as heavy metal adsorbents in filtration systems. Chitosan is a biopolymer known to have a high ability to bind metal ions through its amino and hydroxyl groups. In this study, chitosan was synthesized through several processes, namely Deproteination, mineralization and deacetylation of chitin extracted from squid internal shells. The resulting chitosan was characterized using infrared spectroscopy (FTIR) to identify groups formed from the chitin deacetylation process. The results showed that chitosan based on squid internal shells has an adsorption capacity that meets the standard water content of 2%, ash content of 1% and Deacetyl Degree (DD) of 82.8%. Based on the characterization of functional groups using FTIR, the hydroxyl group -OH and the amine group (-NH2) play a significant role in the heavy metal adsorption process. Because these groups are able to form complex bonds with heavy metal ions. Application in the absorption of Pb metal in water samples of the Tallo River in South Sulawesi, obtained an adsorption effectiveness of 96.4%. Overall, chitosan from squid internal shells has the potential as a heavy metal adsorbent in water filtration applications. This study opens up new opportunities in the development of natural materials for sustainable water treatment technology.
PENGARUH PENAMBAHAN INHIBITOR ALAMI EKSTRAK LIMBAH KULIT JAGUNG TERHADAP LAJU KOROSI MATERIAL BAJA ST 37 DALAM MEDIUM NaCl 3% Rahmaniah, Rahmaniah; Rani, Sefrilita Risqi Adikaning; Abidin, Kurniati; Fitriyanti, Fitriyanti; Ratih, Ratih
Teknosains Vol 17 No 1 (2023): Januari-April
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v17i1.35191

Abstract

Korosi merupakan reaksi antara logam dengan lingkungan di sekitarnya yang mengakibatkan mutu dari logam mengalami penurunan. Salah satu cara untuk menghambat terjadinya korosi pada logam adalah dengan cara membuat permukaan logam tersebut terlindungi oleh suatu inhibitor sehingga tidak terjadi kontak langsung antara logam dengan media korosif. Tujuan penelitian ini untuk mengetahui pengaruh variasi konsentrasi inhibitor terhadap laju korosi, efisiensi inhibitor ekstrak limbah kulit jagung pada baja ST 37 dan untuk mengetahui karakteristik morfologi dan unsur penyusun baja ST 37 tanpa dan dengan inhibitor dengan menggunakan SEM-EDx. Metode yang digunakan pada penelitian ini adalah metode kehilangan massa (Mass Loss). Medium korosif yang digunakan adalah NaCl 3%, dengan suhu medium sebesar 40̊C, waktu ekspos spesimen dilakukan selama 240 jam dengan dengan empat variasi konsentrasi inhibitor yaitu 0 ppm, 400 ppm, 500 ppm dan 600 ppm. Hasil penelitian menunjukkan laju korosi terbesar pada konsentrasi 0 ppm (tanpa inhibitor) yaitu sebesar 88,08 mpy, sementara laju korosi terendah yaitu pada konsentrasi 600 ppm yaitu sebesar 0 mpy. Efisiensi inhibitor korosi yang paling besar terjadi pada konsentrasi 600 ppm sebesar 100%. Karakterisasi Scanning Electron Microscopy (SEM) memperlihatkan agglomeration (gumpulan) tidak merata dengan ukuran kecil, lubang (hole) dan retakan (crack) juga lebih sedikit pada spesimen dengan inhibitor 500 ppm. Hal ini menunjukkan bahwa spesimen telah mengalami korosi dengan jenis retak tegang. Hasil Uji EDX menunjukkan adanya kandungan unsur oksigen yang cukup tinggi dan unsur Fe yang paling rendah pada specimen (a) sebesar 31,03% dan 46,48%, hal ini menunjukan bahwa Fe banyak yang teroksidasi oleh unsur O, sehingga memiliki laju korosi paling tinggi.
Synthesis and Characterization of Optical Properties of Talc/Montmorillonite Nanocomposites via Sol-Gel and Ball Milling Methods Sefrilita Risqi Adikaning Rani; Eka Cahya Muliawati
Science Journal Get Press Vol 2 No 3 (2025): July, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/science.v2i3.164

Abstract

Nanocomposites derived from talc (Mg₃Si₄O₁₀(OH)₂) and montmorillonite (MMT) have gained considerable attention due to their tunable optical, mechanical, and thermal properties. This study systematically compares two synthesis techniques—sol-gel processing and ball milling—for fabricating talc/MMT nanocomposites, with a focus on their optical characteristics. The sol-gel method promoted homogeneous nanoparticle dispersion, while ball milling enhanced exfoliation and reduced particle size. Comprehensive characterization via X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, and photoluminescence (PL) spectroscopy revealed that the nanocomposites exhibit strong UV absorption in the 200–400 nm range, a reduced optical bandgap from 4.5 eV to 3.8 eV, and enhanced PL intensity compared to pristine materials. These findings suggest promising applications in UV shielding, optoelectronics, and photocatalytic systems. The study concludes that the choice of synthesis method plays a pivotal role in tailoring the nanocomposites’ structural integrity and optical functionality, with sol-gel favoring intercalation and uniformity, while ball milling enhances exfoliation and defect-mediated performance. This comparative study highlights the critical influence of synthesis method on the structural, morphological, and optical properties of talc/MMT nanocomposites, providing valuable insights for optimizing layered silicate-based materials for advanced functional applications.
Studi Karakterisasi XRD Pada Material CNT Melalui Variasi Tegangan Hot Wire Kurniati Abidin; Rahmaniah Ilham; Hernawati Hernawati; Sefrilita R.A.R; Dirwan Dirwan
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 11 No 1 (2023)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v11i1.35554

Abstract

Co-Authors Ananda Anindia Putri Asriani Asriani Asriani Asriani Cindi Regita Cahyani Dirwan Dirwan Dwi Febri Isradati Eka Cahya Muliawati Fadilla, A. Ainur Fira Yurdanianti Fitriyanti Fitriyanti Hernawati Hernawati Hernawati Hernawati Hernawati Hernawati Hernawati HERNAWATI HERNAWATI Ihsan Ihsan Ika Widya Wahyuningsih Kurniati Abidin Kurniati Abidin, Kurniati M. Said L Muh. Said L Muh. Yusuf Nidya Lena Fitriah Laksana Nuraeni Nuraeni Nurhidayah Nurhidayah Nurlailiyah Isnaini Nurlinda Jusli Nurrahmi, Sitti Prasepvianto Estu Broto Putri, Ananda Anidya Rahmaniah Ilham RAHMANIAH RAHMANIAH Rahmaniah Rahmaniah Rahmaniah, Rahmaniah ratih ratih Suasmoro Suasmoro Sulaiman Yahirah Muhammad Zelviani, Sri