High dielectric constant and low loss in poly(fluorovinylidene-co-hexafluoropropylene) nanocomposite incorporated with liquid-exfoliated oriented graphene with assistance of hyperbranched polyethylene Original Research Article Polymer, Available online 4 May 2018, Pages Huijian Ye, Nan Meng, Chunfeng Xu, Zhu Meng, Lixin Xu
Graphical abstractThe fabrication of polymer dielectrics combining large dielectric constant and low loss is still challenge for now. Here we demonstrate that the significantly enhanced dielectric property is achieved in P(VDF-HFP) nanocomposite incorporated with few-layer graphene, which is liquid exfoliated with assistance of HBPE based on CH-π stacking. The arrayed nanosheets in nanocomposite is accomplished via uniaxial stretching and is modeled based on Jeffery equation. High dielectric performance is obtained in stretched nanocomposite due to formation of micro-capacitor and large content of electroactive phase, which is attributed to macromolecular crystallization and electrostatic force between matrix and modifier of graphene.Image 1
 | Morphology-control synthesis of a Cu-based metal-organic framework directed by carboxyl-functionalized graphene Original Research Article Polyhedron, Available online 3 May 2018, Pages Shuang Liu, Li-Xian Sun, Lan-Tao Liu, Yan-Li Zhou, Fen Xu
Graphical abstractIn this work, a hexagonal prism shaped CuBTC/carboxyl-functionalized graphene composite was synthesized through a precursor-resolvothermal method, compared to the original octahedral CuBTC. And the mechanism of crystal morphology-control was proposed that carboxyl-functionalized graphene plays a dual role of structure-directing nucleation sites and framework linkers in the process of CuBTC crystal growth.

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