Self-healing superhydrophobic polyvinylidene fluoride/Fe3O4@polypyrrole fiber with core–sheath structures for superior microwave absorption
self-healing, superhy drophobicity, core–sheath structure, microwave absorption
Self-healing superhydrophobic polyvinylidene fluoride/Fe3O4@polypyrrole (FPVDF/Fe3O4@PPyx) fibers with core–sheath structure were successfully fabricatedby electrospinning of a PVDF/Fe3O4 mixture and in situ chemical oxidativepolymerization of pyrrole, followed by chemical vapor deposition with fluoroalkylsilane. The F-PVDF/Fe3O4@PPy0.075 fiber film produces a superhydrophobic surfacewith self-healing behavior, which can repetitively and automatically restoresuperhydrophobicity when the surface is chemically damaged. Moreover, themaximum reflection loss (RL) of the F-PVDF/Fe3O4@PPy0.075 fiber film reaches–21.5 dB at 16.8 GHz and the RL below –10 dB is in the frequency range of10.6–16.5 GHz with a thickness of 2.5 mm. The microwave absorption performanceis attributed to the synergetic effect between dielectric loss and magnetic lossoriginating from PPy, PVDF and Fe3O4. As a consequence, preparing suchF-PVDF/Fe3O4@PPyx fibers in this manner provides a simple and effective route todevelop multi-functional microwave absorbing materials for practical applications.
Tsinghua University Press
Yunan Li,Yong Zhao,Xianyong Lu,Ying Zhu,Lei Jiang, Self-healing superhydrophobic polyvinylidene fluoride/Fe3O4@polypyrrole fiber with core–sheath structures for superior microwave absorption. NanoRes.2016, 9(7): 2034–2045