کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7833803 | 1503524 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement in electroactive crystalline phase and dielectric performance of novel PEG-graphene/PVDF composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this work, polyethylene glycol grafted graphene (PEG-graphene) was obtained from the amidation reaction between graphene oxide and methoxypolyethylene glycol amine followed by the NaHB4 reduction and characterized by transmission electron microscope, Fourier transform infrared spectroscope, wide-angle X-ray diffraction, Raman spectroscope, X-ray photoelectron spectroscope, and thermogravimetric analysis. The PEG-graphene was incorporated into polyvinylidene fluoride (PVDF) to form novel PEG-graphene/PVDF composites by the solution blending method. The well dispersion of PEG-graphene in the PEG-graphene/PVDF composite was confirmed by scanning electron microscopy. Based on the results of FTIR, WAXD, differential scanning calorimetry, and XPS, it was found that the presence of PEG-graphene effectively enhanced the electroactive crystalline content of PVDF from 24.6% for the pure PVDF to 90.5% for the PEG-graphene (15â¯wt.%)/PVDF composite by the interfacial interaction. Moreover, the PEG-graphene (10â¯wt.%)/PVDF composite near the percolation threshold possessed a much higher dielectric constant of 53.3 compared to the pure PVDF (8.2), and a relatively low dielectric loss of 0.265 at 1000â¯Hz.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 448, 1 August 2018, Pages 320-330
Journal: Applied Surface Science - Volume 448, 1 August 2018, Pages 320-330
نویسندگان
Jun-Jun Chen, Ying Li, Xu-Min Zheng, Fu-An He, Kwok-Ho Lam,