Flexible, Ultrathin, and High-Efficiency Electromagnetic Shielding Properties of Poly(Vinylidene Fluoride)/Carbon Composite Films

2017 ◽  
Vol 9 (24) ◽  
pp. 20873-20884 ◽  
Author(s):  
Biao Zhao ◽  
Chongxiang Zhao ◽  
Ruosong Li ◽  
S. Mahdi Hamidinejad ◽  
Chul B. Park
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Carbon Composite ◽  
Electromagnetic Shielding ◽  
Poly Vinylidene Fluoride ◽  
Shielding Properties

Tunable electromagnetic shielding properties of conductive poly(vinylidene fluoride)/Ni chain composite films with negative permittivity

2017 ◽  
Vol 5 (28) ◽  
pp. 6954-6961 ◽  
Author(s):  
Biao Zhao ◽  
Chul B. Park
Keyword(s):  
Vinylidene Fluoride ◽  
Composite Films ◽  
Compression Molding ◽  
Electromagnetic Shielding ◽  
Negative Permittivity ◽  
Solution Processing ◽  
Molding Method ◽  
Poly Vinylidene Fluoride ◽  
Shielding Properties

In this study, we fabricated various poly(vinylidene fluoride) (PVDF)/Ni-chain composites with different Ni contents using the solution processing and compression molding method.

scholarly journals Flexible PEBAX/graphene electromagnetic shielding composite films with a negative pressure effect of resistance for pressure sensors applications

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1535-1543 ◽  
Author(s):  
Biao Zhao ◽  
Xi Zhang ◽  
Jiushuai Deng ◽  
Chun Zhang ◽  
Yang Li ◽  
...  
Keyword(s):  
Negative Pressure ◽  
High Efficiency ◽  
Pressure Effect ◽  
Composite Films ◽  
Pressure Sensors ◽  
Electromagnetic Shielding ◽  
Good Sensitivity ◽  
Emi Shielding ◽  
Shielding Properties

Graphene/PEBAX composite films present high-efficiency EMI shielding properties and good sensitivity as well as sensing stability.

An ultra-thin carbon-fabric/graphene/poly(vinylidene fluoride) film for enhanced electromagnetic interference shielding

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13587-13599 ◽  
Author(s):  
Xiaokang Mei ◽  
Longsheng Lu ◽  
Yingxi Xie ◽  
Wentao Wang ◽  
Yong Tang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electromagnetic Interference ◽  
Vinylidene Fluoride ◽  
Electromagnetic Shielding ◽  
Light Weight ◽  
Carbon Fabric ◽  
Electromagnetic Interference Shielding ◽  
Thin Carbon ◽  
Poly Vinylidene Fluoride ◽  
Shielding Properties

A carbon-fabric/graphene/poly(vinylidene fluoride) film that is light weight, highly flexible, and mechanically robust with outstanding electromagnetic shielding properties and thermal conductivity.

Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

2020 ◽  
Vol 91 (3) ◽  
pp. 31301
Author(s):  
Nabil Chakhchaoui ◽  
Rida Farhan ◽  
Meriem Boutaldat ◽  
Marwane Rouway ◽  
Adil Eddiai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Research Work ◽  
Research Area ◽  
Interfacial Interaction ◽  
Tetraethyl Orthosilicate ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanofillers ◽  
The Impact ◽  
Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

The structural spectra of high dilutions and their unconventional application

2021 ◽  
Vol 15 (1) ◽  
pp. 1
Author(s):  
Saurav Arora
Keyword(s):  
Raman Spectroscopy ◽  
Electrical Properties ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Water Structure ◽  
Laser Raman Spectroscopy ◽  
Oh Groups ◽  
Laser Raman ◽  
Poly Vinylidene Fluoride ◽  
High Dilutions

Until few years, the so-called implausible science, homeopathy, was on the verge of being rejected on conventional physicochemical grounds. The mere selection of ultrahigh dilutions (UHD) (homeopathic potencies) for experimentation by mainstream scientists seemed impossible, but the curiosity to explore the science behind homeopathy kept igniting intellectual alma mater who subjected homeopathy to laboratories and test tubes, to know beyond its clinical application. Still, there exist a huge gap and a challenge to convince a conventional scientist to go beyond his domains and look for something which is apparently invisible (beyond Avogadro). But gradually we are overcoming this dogma and exploring the finer aspects and applications of UHDs. Much research has been undertaken, at least, to protect the identity of UHDs, and we are now verge of proving the plausibility of homeopathy from every aspect. This issue of International Journal of High Dilution Research features two interesting articles on nature of UHDs and their unconventional application. The first article by NC Sukul et al aimed to decipher the nature of the water structure of UHDs of two commonly used homeopathic drugs Natrum muriaticum and Sulphur by Laser Raman Spectroscopy. This work is in the series undertaken by the group, who earlier experimented using Nuclear Magnetic Resonance; Electronic, Vibrational and Raman spectroscopy to shown differences in UHDs of various drugs. The present experiment could differentiate the intensities (potencies) of Nat-m and Sulph when compared to their controls, on the basis of hydrogen bond strength and free OH groups. The second article by Nandy et al proposes a new dimension to the application of UHD. In an interesting manner, the author used UHDs of Ferrum metallicum and Zincum oxidatum to improve the electrical properties of the electroactive Poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP). The PVDF-HFP composite films were synthesized in their usual way, but an incorporation of Ferrum and Zinc-o could make the film as homeo-PVDF-composite. This enhancement of the electrical properties and are possibly due to the presence of nanoparticle, as hypothesized by the group. The nature and application of UHDs are promising but challenging areas, which can only be validated through extensive research and validation. The realm of UHDs is expanding, and the day is not far when plausibility of homeopathy would be proved from every aspect, but at the same time we should also keep the momentum of research at pace in clinical research too!

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