@article{Pan2017, 
author = {Ya-Fei Pan and Guang-Sheng Wang and Lei Liu and Lin Guo and Shu-Hong Yu},
title = {Binary synergistic enhancement of dielectric and microwave absorption properties: A composite of arm symmetrical PbS dendrites and polyvinylidene fluoride},
year = {2017},
journal = {Nano Research},
volume = {10},
number = {1},
pages = {284-294},
keywords = {synergistic enhancement, arm symmetrical dendrites, PbS, dielectric properties, microwave absorption, polyvinylidene fluoride (PVDF)},
url = {https://www.sciopen.com/article/10.1007/s12274-016-1290-8},
doi = {10.1007/s12274-016-1290-8},
abstract = {Arm symmetrical PbS dendrite (ASD-PbS) nanostructures can be prepared on a large scale by a solvothermal process. The ASD-PbSs exhibit a three-dimensional symmetrical structure, and each dendrite grows multiple branches on the main trunk. Such unique ASD-PbSs can be combined with polyvinylidene fluoride (PVDF) to prepare a composite material with enhanced dielectric and microwave-absorption properties. A detailed investigation of the dependence of the dielectric properties on the frequency and temperature shows that the ASD-PbS/PVDF composite has an ultrahigh dielectric constant and a low percolation threshold. The dielectric permittivity is as high as 1, 548 when the concentration of the ASD-PbS filler reaches 13.79 vol.% at 102 Hz, which is 150 times larger than that of pure PVDF, while the composite is as flexible as pure PVDF. Furthermore, the maximum reflection loss can reach -36.69 dB at 16.16 GHz with a filler content of only 2 wt.%, which indicates excellent microwave absorption. The loss mechanism is also elucidated. The present work demonstrates that the addition of metal sulfide microcrystals to polymer matrix composites provides a useful method for improving the dielectric and microwave-absorption properties.}
}