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Inovasi Fisika Indonesia (IFI)
Published by Universitas Negeri Surabaya
ISSN : 23024216     EISSN : 28301765     DOI : https://doi.org/10.26740/ifi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Jurnal Inovasi Fisika Indonesia(IFI) is a peer-reviewed journal, ISSN: 2302-4216, which is managed and published by the Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA). This journal is accessible to all readers and covers developments and research in physics (Materials Physics, Earth Physics and Instrumentation Physics).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 431 Documents
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ANALISIS KEAKURATAN SOLUSI CENTROID MOMENT-TENSOR (CMT) PADA JOKO TINGKIR MENGGUNAKAN METODE MEAN ABSOLUTE ERROR (MAE) DAN SUDUT KAGAN DI WILAYAH JAWA TIMUR Novalianto, Muhammad Ramdhani; Madlazim, Madlazim; Realita, Arie
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p243-252

Abstract

Abstrak Wilayah Jawa Timur merupakan kawasan aktif secara tektonik yang rawan terjadi gempa bumi. Untuk menunjang mitigasi bencana, diperlukan pemahaman yang akurat terhadap mekanisme sumber gempa. Penelitian ini bertujuan untuk mengevaluasi kualitas solusi Centroid Moment-Tensor (CMT) dari sistem Joko Tingkir dengan membandingkannya terhadap solusi dari GlobalCMT. Metode yang digunakan mencakup Mean Absolute Error (MAE) untuk menilai selisih absolut parameter mekanisme sumber (strike, dip, rake) dan sudut Kagan untuk mengukur kesesuaian orientasi bidang patahan. Hasil menunjukkan bahwa nilai MAE masing-masing adalah 64,5° (strike), 14,00° (dip), dan 27,17° (rake). Sementara itu, sudut Kagan berada dalam rentang 2,066° hingga 22,814°, yang masih di bawah ambang batas toleransi 60°. Temuan ini menunjukkan bahwa solusi CMT dari Joko Tingkir cukup konsisten dengan GlobalCMT dan dapat dijadikan referensi awal dalam analisis mekanisme gempa bumi di Jawa Timur. Abstract East Java is one of Indonesia’s tectonically active regions with high seismic risk. To support disaster mitigation, accurate understanding of earthquake source mechanisms is essential. This study aims to assess the accuracy of Centroid Moment Tensor (CMT) solutions generated by Joko Tingkir software by comparing them with GlobalCMT solutions. The Mean Absolute Error (MAE) method was employed to evaluate absolute differences in strike, dip, and rake parameters, while Kagan angle was used to assess the consistency of fault plane orientation. The results show MAE values of 64.5° for strike, 14.00° for dip, and 27.17° for rake. The Kagan angles ranged from 2.066° to 22.814°, well below the 60° tolerance threshold. These findings indicate that Joko Tingkir’s CMT solutions are sufficiently accurate and consistent with GlobalCMT data for preliminary earthquake source mechanism estimation in East Java.
Analisis Keakuratan Katalog Data Gempa Bumi Indonesia pada Software Joko Tingkir terhadap Global Centroid Moment Tensor (GCMT) menggunakan Uji-T Berpasangan, Wilcoxon, dan Sudut Kagan Dewanti, Adek Putri; Madlazim, Madlazim; Fahmi, Muhammad Nurul
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p178-201

Abstract

Abstrak Penelitian ini dilakukan dengan tujuan untuk menganalisis keakuratan focal mechanism yang dihasilkan software Joko Tingkir terhadap GCMT dengan perhitungan sudut Kagan dan menganalisis keakuratan data katalog Joko Tingkir terhadap GCMT melalui perhitungan uji-t berpasangan dan Wilcoxon ditinjau dari hipotesis yang telah ditetapkan. Data yang diuji memiliki magnitudo momen  ≥ 5,0 selama periode 2020-2024 dengan lima daerah penelitian yaitu daerah Jawa, Sumatera, Sulawesi, Maluku, Nusa Tenggara, dan Papua. Parameter yang diuji diantaranya waktu kejadian (origin time), kedalaman, longitude, latitude, dan focal mechanism diantaranya strike, dip, rake. Seluruh data gempa memiliki karakteristik gempa bumi tektonik atau presentase komponen Double Couple (DC) lebih dominan. Hasil perhitungan sudut Kagan dari 50 data uji menunjukkan tidak ada yang mencapai batas 60° sebagaimana dikemukakan oleh Kagan (1991). Nilai ini mengindikasikan bahwa focal mechanism dan bentuk beachball yang dihasilkan oleh software Joko Tingkir relatif sesuai dan homogen terhadap GCMT. Selain itu, nilai-t dari hasil uji-t berpasangan pada parameter kedalaman (-0,88), dip (1,64), dan longitude (-1,23) tidak ada yang mencapai nilai-t kritis . Begitupula untuk nilai z-score dari Wilcoxon pada parameter magnitudo momen (-1,46), strike (-0,25), rake (-0,69) dan latitude (-0,32) tidak ada yang mencapai nilai-z kritis . Dapat disimpulkan bahwa semua parameter peneilitian tidak memiliki perbedaan signifikan antara data katalog Joko Tingir terhadap GCMT.   Abstract This study was conducted with the aim of analyzing the accuracy of focal mechanisms produced by the Joko Tingkir software compared to GCMT using Kagan angle calculations, as well as assessing the accuracy of the Joko Tingkir catalog data against GCMT through paired t-test and Wilcoxon test calculations based on the established hypotheses. The tested data consist of earthquakes with a moment magnitude  ≥ 5.0 during the 2020–2024 period across five study regions: Java, Sumatra, Sulawesi, Maluku, Nusa Tenggara, and Papua. The parameters analyzed include origin time, depth, longitude, latitude, and focal mechanism parameters such as strike, dip, and rake. All tested earthquakes exhibit tectonic characteristics or a dominant Double Couple (DC) component. The Kagan angle results from 50 test data points showed that none exceeded the 60° threshold as stated by Kagan (1991). This indicates that the focal mechanisms and beachball diagrams generated by the Joko Tingkir software are relatively consistent and homogeneous with those of GCMT. In addition, the t-values from the paired t-test for the parameters of depth (-0.88), dip (1.64), and longitude (-1.23) did not reach the critical t-value of ±2.01. Similarly, the z-scores from the Wilcoxon test for the parameters of moment magnitude (-1.46), strike (-0.25), rake (-0.69), and latitude (-0.32) did not reach the critical z-value of ±1.96. It can be concluded that none of the parameters in this study showed significant differences between the Joko Tingkir catalog data and GCMT.
Analisis Seismisitas Wilayah Turki sebagai akibat Aktivitas Seismo-Tektonik Patahan Anatolia Dewi, Karlita; Fahmi, Muhammad Nurul; Realita, Arie
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p276-291

Abstract

This study aims to analyze the seismicity and tectonic stress in Turkey based on earthquake data from the period 1924–2024 using the Frequency-Magnitude Distribution (FMD) approach with the ZMAP7.0 software. The study area is divided into four zones: Zone 1 (northwestern Turkey), Zone 2 (northeastern Turkey), Zone 3 (southwestern Turkey), and Zone 4 (southeastern Turkey). The parameters analyzed include the a-value for seismicity levels and the b-value for estimating subsurface tectonic stress. The results show that a-values ranging from approximately 5.80 to 6.03 are higher in Zones 3 and 4, indicating more frequent seismic activity in the southern regions. Conversely, Zones 1 and 2 have lower a -value, indicating less frequent earthquake occurrences. Lower b-value were found in the northern regions 0.58–0.66, suggesting higher tectonic stress and a greater potential for large earthquakes, particularly along the North Anatolian Fault. The southern regions exhibit higher b-values, reflecting lower stress levels and predominantly smaller earthquakes. For intermediate-depth sources, analysis was conducted only in Zone 3, where a low b-value indicates the potential for large earthquakes at these depths. This study contributes to a better understanding of Turkey's seismic characteristics and is essential for earthquake disaster mitigation planning.
Seismisitas Pulau Sumatera dan Wilayah Sekitarnya Akibat Aktivitas Seismo-Tektonik Zona Subduksi dan Patahan Choirunnisa, Kayla; Fahmi, Muhammad Nurul; Realita, Arie
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p253-267

Abstract

This study aims to analyze the seismicity of Sumatra Island and its surrounding areas, which are known for their intense seismic activity due to complex geological and tectonic conditions. The analysis was conducted using the frequency–magnitude distribution (FMD) to estimate three seismic parameters: Mc, b-value, and a-value. Earthquake data were obtained from the ISC–GEM catalog (1924–2024) with a magnitude range of 4.0 ≤ Mw ≤ 9.5 and processed using ZMAP7.0 in Matlab2018a. Earthquake source depths were classified into shallow and intermediate sources. The analysis results show a dominance of shallow earthquakes, with higher a-values in the western zones (highest in Zone 3: 6.02), indicating intense seismic activity. In contrast, the eastern zones exhibit lower a-values and more stable seismic behavior. The b-values range from 0.4 to 0.9, reflecting high tectonic stress across the study area. Low b-values in the western zones suggest significant seismic energy accumulation and potential for large future earthquakes. The relationship among Mc, b, and a illustrates the characteristics of earthquake sources and supports probabilistic modeling and microzonation prioritization in vulnerable regions.
Gangguan Magnetik dan Elektrik Akibat Perambatan Gelombang Tsunami arianto, Fadia shifa; Fahmi, Muhammad Nurul; Realita, Arie
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p292-306

Abstract

This research aims to study electromagnetic disturbances as the generation of secondary magnetic field signals and total electron content (TEC) variations in the ionosphere due to major trans-Pacific tsunamis. Analysis was conducted on three major tsunami events, namely Hunga Tonga 2022, Tohoku 2011, and Chile 2010. Magnetic disturbance data were obtained using three main parameters taken from the official NOAA website. The data was then compared with the observations from the global INTERMAGNET magnetic stations. Meanwhile, the electrical disturbance data was obtained through GNSS-TEC satellite observations. The data obtained is then processed using statistical methods and signal observation to detect anomalies before and during a tsunami. The analysis results show a high level of agreement in bz values between the analytical estimates and observations. In the Tonga tsunami 2022, the difference ranged from 0.04-0.60 nT; Tohoku 2011 ranged from 0.00-0.90 nT; and Chile 2010 ranged from 0.00-0.06 nT. Additionally, TEC variations show significant disturbances in the ionosphere, with decreases and fluctuations in TEC values detected from before to several hours after the tsunami event. These findings confirm that tsunamis, whether triggered by earthquakes or volcanic eruptions, can produce measurable electromagnetic disturbances, and have the potential to be utilized for preliminary studies of early disaster detection systems.  
SINTESIS DAN KARAKTERISASI REDUCED GRAPHENE OXIDE DARI CANGKANG SAWIT TERMODIFIKASI SILIKA ali, Mohamad Fikri Aliansah; Munasir, Munasir
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p268-275

Abstract

Abstrak Penelitian ini melaporkan hasil sintesis reduced graphene oxide (rGO) yang dimodifikasi silika (SiO₂) dari bahan alam; rGO dibuat dari cangkang inti sawit menggunakan metode hummer kemudian dilapisi dengan SiO₂ dari prekursor TEOS menggunakan metode sol-gel dan direduksi menggunakan metode hidrotermal-hidrazin. Analisis XRD menunjukkan bahwa rGO cangkang inti sawit yang dimodifikasi SiO₂ menunjukkan pergeseran kisi yang disebabkan oleh penjangkaran SiO₂ pada struktur grafen yang konsisten dengan hasil SEM/EDX. Pengamatan FTIR menunjukkan bahwa SiO₂ telah terbentuk pada rGO dengan adanya gugus Si-O-C dan Si-OH serta reduksi gugus OH yang menunjukkan bahwa proses modifikasi rGO terjadi melalui ikatan hidrogen. Pada pengamatan konduktivitas sampel, sampel rGO memiliki konduktivitas sebesar 23,65x10⁻² S/m sedangkan sampel rGO@SiO₂ memiliki konduktivitas sebesar 16,71x10⁻² S/m dimana terjadi penurunan konduktivitas yang disebabkan oleh sifat intrinsik SiO₂ yang bersifat sangat isolator.   Abstract This work reports the results of the synthesis of silica (SiO₂)-modified reduced graphene oxide (rGO) from natural materials; rGO was made from palm kernel shells using the hummer method then coated with SiO₂ from TEOS precursor using the sol-gel method and reduced using hydrothermal-hydrazine. XRD analysis showed that SiO₂-modified palm kernel shell rGO exhibited rid shift caused by SiO₂ anchoring on the graphene structure which was consistent with the SEM/EDX results. FTIR observations showed that SiO₂ had formed on rGO with the presence of Si-O-C and Si-OH groups and a reduction in OH groups indicating that the rGO modification process was through hydrogen bonds. In the observation of sample conductivity, the rGO sample had a conductivity of 23.65x10⁻² S/m while the rGO@SiO₂ sample had a conductivity of 16.71x10⁻² S/m where there was a decrease in conductivity caused by the intrinsic nature of SiO₂ which was very insulating.
KARAKTERISTIK TIO₂ HASIL SINTESIS KIMIA DAN GREEN SYNTHESIS MENGGUNAKAN EKSTRAK BUNGA MELATI (JASMINUM SAMBAC) SEBAGAI FOTOKATALIS POTENSIAL Monika Dea Prahesti; Munasir
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p224-233

Abstract

Abstrak Kontaminasi air oleh senyawa pewarna organik seperti Congo Red merupakan masalah lingkungan serius karena sifat karsinogenik dan resistensinya terhadap degradasi alami. Titanium dioksida (TiO₂) dikenal sebagai fotokatalis yang efektif untuk menguraikan senyawa berbahaya menjadi produk yang lebih aman. Penelitian ini membandingkan karakteristik TiO₂ yang disintesis secara kimia dengan TiO₂ yang disintesis menggunakan metode green synthesis berbasis ekstrak bunga melati (Jasminum sambac). Sintesis hijau menggunakan senyawa fitokimia sebagai agen reduksi alami. Karakterisasi dilakukan menggunakan XRD dan FTIR untuk menganalisis struktur kristal dan gugus fungsional dari kedua sampel. Hasil XRD menunjukkan bahwa kedua metode menghasilkan fase anatase dengan ukuran kristal rata-rata 7,19 nm, namun green synthesis menunjukkan intensitas difraksi yang lebih tinggi. FTIR mengidentifikasi keberadaan gugus Ti–O dan O–H pada kedua sampel, dengan variasi intensitas akibat pengaruh senyawa alami dari ekstrak bunga melati. Uji fotokatalitik memperlihatkan bahwa TiO₂ mampu mendegradasi larutan Congo Red hingga 98,7% dalam 60 menit, menegaskan efektivitasnya dalam aplikasi pengolahan limbah cair berwarna. Hasil ini menunjukkan bahwa penggunaan ekstrak bunga melati (Jasminum sambac) sebagai agen pada green synthesis dapat menghasilkan TiO₂ dengan struktur dan sifat fotokatalitik yang mendukung degradasi senyawa organik berbahaya dalam air.   Abstract Water contamination by organic dyes such as Congo Red is a serious environmental problem due to its carcinogenic properties and resistance to natural degradation. Titanium dioxide (TiO₂) is known as an effective photocatalyst for decomposing hazardous compounds into safer products. This study compared the characteristics of chemically synthesized TiO₂ with TiO₂ synthesized using a green synthesis method based on jasmine (Jasminum sambac) flower extract. Green synthesis uses phytochemical compounds as natural reducing agents. Characterization was carried out using XRD and FTIR to analyze the crystal structure and functional groups of both samples. XRD results showed that both methods produced anatase phase with an average crystal size of 7.19 nm, but green synthesis showed higher diffraction intensity. FTIR identified the presence of Ti–O and O–H groups in both samples, with variations in intensity due to the influence of natural compounds from jasmine flower extract. Photocatalytic tests showed that TiO₂ was able to degrade Congo Red solution up to 98.7% in 60 minutes, confirming its effectiveness in colored wastewater treatment applications. These results indicate that the use of jasmine (Jasminum sambac) flower extract as an agent in green synthesis can produce TiO₂ with a structure and photocatalytic properties that support the degradation of hazardous organic compounds in water.
ANALISIS OPTIK PEROVSKIT KERANG TEBALAN SEBAGAI BIO-MATERIAL SEL SURYA Rohmah, Roihatur; Yuwita, Pelangi Eka; Hilmi, Allif Rosyidy; Farikhah, Ainun Nurul
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p202-208

Abstract

Abstrak Semikonduktor merupakan material yang terus dikembangkan, termasuk melalui pemanfaatan bahan alam sebagai kandidat bio-material sel surya. Penelitian ini berfokus pada pemanfaatan kalsium karbonat alami dari cangkang kerang tebalan Pantai Tuban sebagai bahan baku perovskit CaTiO₃ untuk material bio-sel surya, yang masih jarang diteliti. Proses sintesis dilakukan melalui tahapan pembersihan, pemanasan, dan pencampuran dalam reaksi padatan antara kalsium karbonat dan titanium dioksida (TiO₂). Analisis dilakukan menggunakan metode Tauc plot untuk menentukan celah energi serta difraksi sinar-X (XRD) guna mengidentifikasi struktur kristal. Hasil karakterisasi menunjukkan bahwa material yang terbentuk memiliki struktur kristal perovskit dengan fasa ortorombik, ditunjukkan oleh parameter kisi a = 5,388 Å, b = 5,432 Å, c = 7,639 Å, dan volume sel sebesar 223,567 ų. Selain itu, diperoleh nilai energi gap dengan transisi direct allowed (n = 1/2) sebesar 3,94 eV dan transisi indirect allowed (n = 2) sebesar 3,67 eV. Temuan ini menegaskan bahwa CaTiO₃ hasil sintesis dari cangkang kerang tebalan memiliki karakter semikonduktor yang potensial untuk diaplikasikan sebagai bio-material sel surya, khususnya sebagai aditif dalam lapisan penyangga maupun lapisan transpor elektron.   Abstract Semiconductors are materials that continue to be widely developed, including through the utilization of natural resources as potential bio-materials for solar cells. This study focuses on the use of natural calcium carbonate derived from Tebalan seashells collected from Tuban Beach as a precursor for CaTiO₃ perovskite, which remains rarely investigated. The synthesis process was carried out through several stages, namely cleaning, heating, and solid-state reaction between calcium carbonate and titanium dioxide (TiO₂). Characterization was performed using the Tauc plot method to determine the energy band gap and X-ray diffraction (XRD) to identify the crystal structure. The results show that the synthesized material possesses a perovskite crystal structure with an orthorhombic phase, indicated by lattice parameters a = 5.388 Å, b = 5.432 Å, c = 7.639 Å, and a unit cell volume of 223.567 ų. Furthermore, the band gap energy values were found to be 3.94 eV for the direct allowed transition (n = 1/2) and 3.67 eV for the indirect allowed transition (n = 2). These findings confirm that CaTiO₃ synthesized from Tebalan seashells exhibits semiconductor characteristics with promising potential for application as a bio-material in solar cells, particularly as an additive in buffer layers or electron transport layers.
IDENTIFIKASI STRUKTUR BATUAN BAWAH PERMUKAAN KAWASAN GUNUNG MERAPI DAN GUNUNG KELUD DENGAN METODE GRAVITASI Nadya; Zainul Arifin Imam Supardi; Arie Realita
Inovasi Fisika Indonesia Vol. 14 No. 3 (2025): Vol 14 No 3
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n3.p307-315

Abstract

Abstrak Mineral pasir merupakan komoditas penting dalam sektor konstruksi. Pasir yang berkualitas bagus secara teknis ditandai oleh ukuran butir yang seragam, kandungan lempung yang rendah, tingkat kepadatan dan ketahanan yang tinggi. Salah satu pasir berkualitas bagus adalah pasir Merapi dan Kelud yang banyak digunakan sebagai bahan campuran beton. Kualitas pasir tersebut diduga berhubungan dengan material vulkanik penyusun struktur batuan bawah permukaan Gunung Merapi dan Gunung Kelud. Tujuan penelitian ini untuk mengidentifikasi struktur batuan bawah permukaan kawasan Gunung Merapi dan Gunung Kelud menggunakan metode gravitasi berbasis data satelit. Proses pengolahan data melibatkan koreksi data gravitasi (FAC, koreksi Bouguer, dan koreksi Terrain) yang diterapkan untuk mengubah raw data menjadi corrected data dalam bentuk Complete Bouguer Anomali (CBA). Beberapa aplikasi yang digunakan dalam penelitian ini adalah Global  Mapper, Surfer, Oasis Montaj, Grablox, dan aplikasi phyton. Hasil penelitian ini menunjukkan bahwa jenis batuan Gunung Merapi adalah andesit sedangkan jenis batuan Gunung Kelud adalah basalt. Abstract Sand mineral is an important commodity in the construction sector. Good quality sand is technically characterized by uniform grain size, low clay content, high density and durability. One of the good quality sands is Merapi and Kelud sand which is widely used as a concrete mixture. The quality of the sand is thought to be related to the volcanic material that makes up the subsurface rock structure of Mount Merapi and Mount Kelud. The purpose of this study was to identify and interpret the subsurface rock structure of the Mount Merapi and Mount Kelud areas using a gravity method based on satellite data. The data processing process involves gravity data correction (FAC, Bouguer correction, and Terrain correction) which is applied to convert raw data into corrected data in the form of Complete Bouguer Anomaly (CPA). Some of the applications used in this study are Global Mapper, Surfer, Oasis Montaj, Grablox, and the phyton application. The results of this study indicate that the type of rock of Mount Merapi is andesite while the type of rock of Mount Kelud is basalt.  
PENGARUH KOMPOSISI PANI/SIO2 SEBAGAI BAHAN PELAPIS ANTI KOROSI PADA BAJA TIPE SS 304 dhiny_erlindasari; Kusumawati, Diah Hari; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 14 No. 3 (2025): Vol 14 No 3
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n3.p316-325

Abstract

Abstrak PANi merupakan polimer konduktif yang mudah disintesis, memiliki konduktivitas tinggi, dan mampu menghambat pergerakan ion-ion elektrolit yang bersifat merusak. SiO2 merupakan bahan keramik anorganik dengan stabilitas termal tinggi dan isolator listrik yang baik. Paduan kedua material ini, membentuk PANi/SiO2 yang terbukti efektif dalam meningkatkan ketahanan korosi, terutama pada permukaan logam PANi disintesis melalui reaksi polimerisasi oksidasi, sedangkan pembuatan PANi/SiO2 menggunakan metode pencampuran basah (wet mixing). PANi/SiO2 dilapiskan pada substrat baja SS 304 menggunakan metode dip coating. Pelapisan dilakukan dengan variasi konsentrasi PANi/SiO2 yang telah ditentukan sebelumnya, dengan tujuan agar mendapatkan komposisi optimal dan ketahanan korosi yang maksimal. PANi/SiO2 dikarakterisasi menggunakan FTIR, XRD, dan SEM. Laju korosi diperoleh dengan uji korosi menggunakan potensiostat. Hasil uji korosi menunjukkan bahwa konsentrasi 5,5% memberikan penurunan laju korosi terbaik dibandingkan variasi konsentrasi lainnya, yaitu sebesar 0,63 x 10-3 mm/year. Konsentrasi ini mampu membentuk lapisan pelindung yang optimal dengan distribusi partikel SiO2 yang merata serta jaringan konduktif PANi yang efektif menghambat penetrasi ion-ion agresif. Abstract PANi is a conductive polymer that is easy to synthesize, possesses high electrical conductivity, and is capable of inhibiting the movement of destructive electrolyte ions. SiO2 is an inorganic ceramic material with high thermal stability and excellent electrical insulation properties. The combination of these two materials forms a PANi/SiO2 composite, which has been proven effective in enhancing corrosion resistance, particularly on metal surfaces. PANi is synthesized through oxidative polymerization, while the PANi/SiO2 composite is prepared using the wet mixing method. The composite is applied to SS 304 stainless steel substrates using the dip coating technique. The coating process was carried out with various predetermined concentrations of PANi/SiO2, aiming to obtain the optimal composition and maximum corrosion resistance. The PANi/SiO2 composite was characterized using FTIR, XRD, and SEM. Corrosion rate was measured through electrochemical corrosion testing using a potentiostat. The results showed that the 5,5% concentration yielded the best reduction in corrosion rate compared to other variations, with a value of 0,63 x 10-3 mm/year. This concentration successfully formed an optimal protective layer, characterized by a uniform distribution of SiO2 particles and a conductive PANi network that effectively inhibits the penetration of aggressive ions.

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