کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7214554 1469466 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Poly(vinylidene fluoride)-Based composites modulated via multiscale two-dimensional fillers for high dielectric performances
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Poly(vinylidene fluoride)-Based composites modulated via multiscale two-dimensional fillers for high dielectric performances
چکیده انگلیسی
Ultrathin two-dimensional (2D) semiconductor molybdenum disulfide (MoS2) nanosheets have wide applications in electronic devices. Incorporation of MoS2 nanosheets into poly(vinylidene fluoride) (PVDF) renders a type of dielectric composite regulated with 2D architecture. However, due to the semiconducting behavior of MoS2, the accompanying high dielectric loss prevents the composite being good dielectrics. Aluminum flakes (AFs), another 2D structure in micron scale, were thus introduced into the MoS2/PVDF composite to block leakage path as well as providing another source for electric polarization. The effects of multiscale 2D fillers on adjusting the dielectric and electrical properties of the ternary MoS2/AFs/PVDF composites were investigated systematically. The largely suppressed dielectric loss and electrical conductivity of ternary composite compared with those of MoS2/PVDF composite is ascribed to the parallel arranged self-passivated AFs, which effectively inhibit the direct connection and overlapping of MoS2 nanosheets along the electric field direction. Meanwhile, formation of numerous micro-capacitors with AFs as electrodes and MoS2/PVDF composite as dielectric medium makes an additional contribution to the high dielectric constant of the ternary composite. Furthermore, the dielectric polarization and relaxation process of composites were investigated in terms of electric modulus to explain the variation tendency of dielectric and electric property of the composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 159, 3 May 2018, Pages 162-170
نویسندگان
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