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Journals / Politeknik Dergisi / 2026 / Cilt: 27 Sayı: 1

Long-Term Stability of Novel Surface-Modified Fe3O4 Nanoparticles Used for Preparing Water Based Nanofluids

Su Bazlı Nanoakışkanların Hazırlanmasında Kullanılan Yeni Yüzey Modifiye Fe3O4 Nanopartiküllerinin Uzun Vadeli Kararlılıklarının İncelenmesi

Burak Muratçobanoğlu(ERZURUM TECHNICAL UNIVERSITY)0000-0003-0671-2861
Emre Mandev(ERZURUM TECHNICAL UNIVERSITY)0000-0002-6791-4136
Bayram Şahin(İSTANBUL TEKNİK ÜNİVERSİTESİ)0000-0002-7016-644X
Eyüphan Manay(ERZURUM TECHNICAL UNIVERSITY)0000-0002-5456-8756
Shabnam Rahimpour(University of Tabriz)0000-0003-4998-957X
Reza Teimuri-mofrad(University of Tabriz)0000-0002-5812-6445
Faraz Afshari(ERZURUM TECHNICAL UNIVERSITY)0000-0001-9192-5604
Pages
81–89
Publication Date
2024-02-29
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The most important analyses in this study are Scanning Electron Microscope, X-Ray Diffraction, and Transmission Electron Microscope.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Nanofluids are produced by suspending different solid nano-size materials (metal and nonmetal) in a base liquid and are often used in energy systems to increase thermal performance and heat transfer rate.
📊
Key Findings & Data:In this work, Fe3O4 nanoparticles were subjected to chemical processes and their surfaces were modified.
💡
Conclusion & Impact:The most important analyses in this study are Scanning Electron Microscope, X-Ray Diffraction, and Transmission Electron Microscope.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Nanoakışkan · Kararlılık · Yüzey Modifikasyonlu Nanopartiküller

Abstract

Nanofluids are produced by suspending different solid nano-size materials (metal and nonmetal) in a base liquid and are often used in energy systems to increase thermal performance and heat transfer rate. The main problem observed in nanofluids used in heat transfer applications is their instability. Researchers have developed and proposed some solutions to obtain stable nanofluids. One of the most important solutions, is the nanoparticles surface modification method. In this work, Fe3O4 nanoparticles were subjected to chemical processes and their surfaces were modified. Three different modified nanoparticles were synthesized, which are Fe3O4@SiO2@Si(CH2)3-IM [Cl], Fe3O4@Si(CH2)3-IM [Cl], and Fe3O4@SiO2&Si(CH2)3-IM [Cl] nanoparticles. The nanofluids were prepared in 0.2% Vol. fraction by using the produced particles in base fluid which was distilled water, and stability of nanofluids were observed for 3 months. Nanofluids were subjected to ultrasonication for 3.5 h to obtain homogeneous nanofluid. Not modified water-based Fe3O4 nanofluid completely collapsed in approximately 1 week. In modified nanofluids, although sedimentation occurred, it was observed that a certain amount of the particles remained suspended even after 3 months. The most important analyses in this study are Scanning Electron Microscope, X-Ray Diffraction, and Transmission Electron Microscope.

Özet

Nanoakışkanlar, farklı katı nano boyutlu materyallerin (metal veya metal olmayan) bir baz sıvı içinde süspanse edilmesiyle üretilir ve genellikle enerji sistemlerinde termal performansı ve ısı transfer hızını artırmak için kullanılır. Isı transferi uygulamalarında kullanılan nanoakışkanlarda gözlenen temel problem kararsızlıklarıdır. Araştırmacılar tarafından kararlı nanoakışkanlar elde etmek için bazı çözümler geliştirilmiş ve önerilmiştir. En önemli çözümlerden biri nanopartikül yüzey modifikasyon yöntemidir. Bu çalışmada Fe3O4 nanopartikülleri kimyasal işlemlere tabi tutulmuş ve yüzeyleri modifiye edilmiştir. Fe3O4@SiO2@Si(CH2)3-IM [Cl], Fe3O4@Si(CH2)3-IM [Cl], ve Fe3O4@SiO2&Si(CH2)3-IM [Cl] nanopartiküller olmak üzere üç farklı modifiye nanopartikül sentezlenmiştir. Üretilen partiküller arıtılmış su olan baz akışkan içerisinde kullanılarak %0,2 hacim oranında nanoakışkanlar hazırlanmış ve nanoakışkanın kararlılığı 3 ay boyunca gözlemlenmiştir. Homojen nanoakışkanlar elde etmek amacıyla nanoakışkanlar 3.5 saat ultrasonikasyona tabi tutulmuştur. Su bazlı modifikasyonsuz Fe3O4 nanoakışkanı yaklaşık 1 hafta içinde tamamen çökmesi gözlemlenmiştir. Modifiye edilmiş nanoakışkanlarda ise, çökelme meydana gelmesine rağmen 3 ay sonra bile partiküllerin belirli bir miktarının süspanse kaldığı gözlemlenmiştir. Bu çalışmada, Taramalı Elektron Mikroskobu, X-Işını Kırınımı ve İletim Elektron Mikroskobu gibi önemli analiz yöntemleri kullanılmıştır.

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Cite This Article

Muratçobanoğlu, B., Mandev, E., Şahin, B., Manay, E., Rahimpour, S., Teimuri-mofrad, R., Afshari, F. (2024). Long-Term Stability of Novel Surface-Modified Fe3O4 Nanoparticles Used for Preparing Water Based Nanofluids. Politeknik Dergisi, Cilt: 27 Sayı: 1, 81–89. https://doi.org/10.2339/politeknik.1103490

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