مواد و فناوری‌های پیشرفته

مواد و فناوری‌های پیشرفته

پوشش نانوکامپوزیتی چندجزیی منعطف برای جذب مؤثر امواج الکترومغناطیسی

نوع مقاله : مقاله کامل پژوهشی

نویسندگان
علی رشیدی 1
غلامرضا کیانی 2
ایوب کریم زاد قویدل 3
مهسا مهدوی نیا 4
1 کارشناسی ارشد، گروه مهندسی نانوفناوری، دانشکده برق و کامپیوتر، دانشگاه تبریز، تبریز، آذربایجان شرقی، ایران
2 دانشیار، گروه شیمی آلی و بیوشیمی، دانشکده شیمی، دانشگاه تبریز، تبریز، آذربایجان شرقی، ایران
3 مربی، گروه مهندسی مکانیک، دانشگاه فنی و حرفه‌ای، تهران، تهران، ایران
4 دانشجوی دکتری، گروه شیمی آلی و بیوشیمی، دانشکده شیمی، دانشگاه تبریز، تبریز، آذربایجان شرقی، ایران
10.30501/jamt.2022.329382.1216
چکیده
هدف از این پژوهش، ساخت پوشش نانوکامپوزیتی منعطف چندجزیی و با کارآیی بالا جهت جذب امواج الکترومغناطیس است. نمونه­ های نانوکامپوزیتی چندجزیی شامل: نانولوله­ های کربنی، ساختار هسته-پوسته پلی­آنیلین-اکسید­آهن و نانوسیم­های نیکل، با درصدهای وزنی 2، 4 و 6 درصد در زمینه پلی­ آکریلیک پایه آبی در ضخامت 2 میلی­متر تهیه شد و مشخصات ساختاری آن­ها، توسط میکروسکوپ الکترونی روبشی نشر میدانی بررسی شد. مقدار عایق­ سازی پوشش ­ها در برابر امواج الکترومغناطیس، توسط دستگاه تحلیل گر شبکه برداری در محدوده بسامدی 8-12 گیگاهرتز اندازه­گیری شد. نتایج نشان داد که با افزایش غلظت پرکننده­ ها، شبکه متراکم رسانا از آن­ها در زمینه شکل می­ گیرد که موجب برهم‌کنش بیشتر با امواج الکترومغناطیس شده و در نهایت جذب بیشتر می­شود. حضور هم‌زمانِ هر سه عامل تقویت‌کننده‌ جذب امواج شامل: نانولوله ­های کربنی، پلی ­آنیلین-اکسید آهن و نانوسیم­ های نیکل به‌ترتیب با بهبود هدایت الکتریکی و مغناطیسی زمینه، میزان عایق­ سازی مؤثر بزرگ‌تری را در مقایسه با حالت ­های تک و یا دو­جزیی ارایه کردند. درنهایت، ارزیابی­ ها مشخص نمود که نانوکامپوزیت متشکل از هر سه پرکننده با 6 درصد وزنی، با عایق ­سازی مؤثر 22 دسیبل، ایده ­آل­ ترین عملکرد را در محدوده بسامدی X در مقایسه با سایر نانوکامپوزیت­ ها دارد.
کلیدواژه‌ها
عایق منعطف امواج الکترومغناطیس
نانوکامپوزیت چندجزئی
پلی‌آنیلین
نانوسیم‌های نیکل
نانولوله‌های کربنی

موضوعات

عنوان مقاله English

Flexible Multicomponent Nanocomposite Cover for Efficient Absorption of Electromagnetic Waves

نویسندگان English

Ali Rashidi 1
Gholamreza Kiani 2
Ayub Karimzad Ghavidel 3
Mahsa Mahdavinia 4
1 M. Sc., Department of Nanotechnology Engineering, Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, East Azerbaijan, Iran
2 Associate Professor, Department of Organic Chemistry and Biochemistry, Faculty of Chemistry, University of Tabriz, Tabriz, East Azerbaijan, Iran
3 Lecturer, Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Tehran, Iran
4 Ph. D. Student, Department of Organic Chemistry and Biochemistry, Faculty of Chemistry, University of Tabriz, Tabriz, East Azerbaijan, Iran
چکیده English

The main objective of this research was to fabricate a flexible Multi-component Nanocomposite (MN) cover with high efficiency to absorb Electro-Magnetic Waves (EMW). For this purpose, nine MNs containing Carbon Nanotubes (CNTs), core-shell structure of Polyaniline-Fe3O4 (PANI), and Nickel Nanowires (NiNW) were prepared with different weight percentages of 2, 4, and 6 with the thickness of 2 mm within the waterborne polyacrylic. Then, their structural characteristics were investigated through Field-Emission Electron Microscopy (FE-SEM). The protection value of the covers against EMW were measured using a Vector Network Analyzer (VNA) machine at the frequency range of 8-12 GHz. The results revealed that followed by an increase in the concentration of the fillers, they formed a dense and conductive network within the matrix, thus leading to more interaction by EMW and eventually more absorption. The simultaneous presence of all three of EMW absorbtion enhancers including CNTs, PANI, and NiNW offered a more effective shielding than that in both single and double components by improving the matrix electrical and magnetic conductivity. Finally, the evaluations proved that the nanocomposite containing the mentioned three fillers with the wight percentage of  6 wt % and effective shielding of 22 dB exhibited the most ideal performance between other nanocomposites over the X-frequency range.

کلیدواژه‌ها English

Electromagnetic Wave Absorber
Multicomponent Nanocomposite
Polyaniline
Nickel Nanowires
Carbon Nanotubes
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مواد و فناوری‌های پیشرفته
دوره 11، شماره 2
تابستان 1401
صفحه 27-43

  • تاریخ دریافت 25 بهمن 1400
  • تاریخ بازنگری 06 فروردین 1401
  • تاریخ پذیرش 06 اردیبهشت 1401