Reinforcement of Electromagnetic Wave Absorption Characteristics in PVDF‑PMMA Nanocomposite by Intercalation of Carbon Nanofibers

Anam Naseer; Muhammad Mumtaz; Muhammad Raffi; Izhar Ahmad; Sabih D. Khan; Rana I. Shakoor; Shaista Shahzada

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자료유형: 학술저널

저자정보: Anam Naseer (International Islamic University) Muhammad Mumtaz (National Institute of Lasers and Optronics) Muhammad Raffi (National Institute of Lasers and Optronics) Izhar Ahmad (National Institute of Lasers and Optronics) Sabih D. Khan (National Institute of Lasers and Optronics) Rana I. Shakoor (Air University) Shaista Shahzada (International Islamic University)

저널정보: 대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.15 No.2

발행연도: 2019.1

수록면: 201 - 207 (7page)

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With the recent developments in the millimeter and sub-millimeter wave instruments and devices, there is a need to developelectromagnetic (EM) wave absorbing materials in these frequency bands for applications like electromagnetic interferencecontrol, electromagnetic compatibility, etc. In this work, carbon nanofi bers (CNF) were uniformly dispersed in a blend ofpoly(methyl methacrylate), polyvinylidene fl uoride and cyanoacrylate for air spray coating a fi lm on the cellulosic substrates. The samples were characterized for evaluation of their structure, morphology, electrical and EM absorption properties in0.15–1.2 THz range by X-ray diff raction, fi eld emission electron microscopy, I–V measurements and terahertz time domainspectroscopy. These coatings can conveniently be applied to the material surfaces by conventional air spray painting method,which makes this technique cost-eff ective as well as easy to deploy in various applications. The electrical conductivityenhancement in the samples has been attributed to the formation of conducting network by uniform distribution of CNFs inthe insulating polymer matrix. As a result, the shielding eff ectiveness (SE) has been observed to improve with the increasein CNF’s loading in the polymer matrix. The SE is also a function of frequency, which is attributed to the increase in theskin depth. A SE of 20 dB has been estimated in these samples for the frequencies 1 THz and higher, which is of signifi cantimportance for the use of this technique in practical applications.

#Carbon nanofi bers · Polymer nanocomposites · Electromagnetic interferences shielding · Terahertz time domain spectroscopy

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