Porous superhydrophobic polymer/carbon composites for lightweight and self-cleaning EMI shielding application

Ma, Xinxue; Shen, Bin; Zhang, Lihua; Liu, Yinfeng; Zhai, Wentao; Zheng, Wenge

doi:10.1016/j.compscitech.2018.02.006

Cited by 157 publications

(65 citation statements)

References 52 publications

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“…The superhydrophobic and superhydrophilic behaviors of different surfaces have attracted much attention in industrial fields as well as scientific research [1,2]. The superhydrophilic coating material leads to a water contact angle (Θ) lower than 5° on solid surface.…”

Section: Introductionmentioning

confidence: 99%

“…These materials are already commercially used for antifogging glasses, mirrors and outward walls of buildings. [1,2]. After the discovery of the photo-induced superhydrophilicity of photocatalyst (TiO 2 ) layers in 1997 [3], commercially applicable photofunctional materials that have self-cleaning properties were synthetized with the use of pure TiO 2 particles and composite thin films [4].…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to extend the absorption spectrum of the semiconductor photocatalysts by, for example, modifying the catalyst particles with different metallic or non-metallic elements. The synthetized functionalized catalysts can be excited by Photoreactive composite coating with composition dependent wetting properties L. Mérai 1 , Á. Deák 1 , D. Sebők 1 , E. Csapó 1,2 , T. S. Kolumbán 3,4 , B. Hopp 4 , I. Dékány 1,2 , L. Janovák 1* the near-UV or visible (VIS) light due to the absorption of metal nanoparticles at lower energy wavelengths [5,6]. The incorporation of semiconductor photocatalystic particles in an appropriate polymer-based support or binder material is expected to create antimicrobial and self-cleaning properties, which would extend its field of application.…”

Section: Introductionmentioning

confidence: 99%

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Photoreactive composite coating with composition dependent wetting properties

Mérai¹,

Deák²,

Sebők³

et al. 2018

Express Polym. Lett.

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Photoreactive composite thin layers with tunable wetting properties from superhydrophilic to superhydrophobic nature were prepared. To achieve extreme wetting properties, the adequate surface roughness is a crucial factor, which was achieved by the incorporation of plasmonic Ag-TiO 2 particles, as polymer filler, into the smooth polymer film with adjusted hydrophilicity. The initial copolymer films were synthesized from hydrophilic 2-hydroxyethyl-acrylate (HEA) and hydrophobic perfluorodecyl-acrylate (PFDAc) monomers. In the case of hydrophobic PFDAc, the photocatalyst-roughened thin films displayed superhydrophobic behavior (γ s tot~ 2.3±1.7 mJ/m 2 , Θ > 150°), while the roughened hydrophilic pHEA layers possessed superhydrophilicity (γ s tot~ 72.1±0.2 mJ/m 2 , Θ~ 0°). The photoactivity of the composites was presented both in solid/ gas (S/G) and solid/ liquid (S/L) interfaces. According to the light-emitting diode (LED) light photodegradation tests on ethanol (EtOH) as volatile organic compound (VOC) model-molecules at the S/L interface, the superhydrophobic hybrid layer was photooxidized 88.3% of the initial EtOH (0.36 mM). At S/L interface the photocatalytic efficiency was depended on the polarity of the model pollutant molecules: the photooxidation of hydrophobic SUDAN IV (c 0 = 0.25 mg/mL) dye reached 80%, while in the case of the hydrophilic Methylene Blue dye (c 0 = 0.002 mg/mL) it was only 17.3% after 90 min blue LED light (λ = 405 nm) illumination.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoreactive composite coating with composition dependent wetting properties

Mérai¹,

Deák²,

Sebők³

et al. 2018

Express Polym. Lett.

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“…In addition, according to the Ling et al ., the MXene film showed a contact angle of 35° and fabricated fabric dramatically improved the contact angle by 3.5 times . Hence, the fabricated hydrophobic fabric can act as a self‐cleaning fabric …”

Section: Resultsmentioning

confidence: 98%

“…reported that the MXene thin film with thickness below 30 nm exhibited an excellent electrical conductivity of 4300 S/cm. The Ti 3 C 2 T x /Poly (diallyldimethylammonium chloride) (PDDA) and MXene/polyvinyl alcohol (PVA) composite showed 2 S/cm and almost zero depending on PVA content, respectively . In addition, Cao et al .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Nonwetting Flexible Free‐Standing MXene‐Carbon Fabric for Electromagnetic Shielding in S‐Band Region

Raagulan

Braveenth

Jang

et al. 2018

Bulletin Korean Chem Soc

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MXene and nonwoven carbon fabric are good candidate for flexible, light‐weight electromagnetic interference (EMI) shielding fabric. The prepared composite was characterized using X‐ray diffraction, X‐ray photo electron spectroscopy, energy‐dispersive X‐ray spectroscopy, scanning electron microscope, mapping, and Raman spectroscopy. The 15 times coated composite displayed a contact angle of 123°, a wetting energy of −39.86 mN/m, a spreading coefficient of −112.66 mN/m, and 32.94 mN/m work of adhesion. The fabricated composites inhibited thermal degradation until 235 °C. The composite revealed an excellent electric conductivity of 8.5 S/cm with a sheet resistance of 6.5 Ω/sq. The composite showed a maximum EMI shielding of 43.2 dB at 2.3 GHz with 8534.7 dB cm2/g. The composite displays better outlook application areas such as aviation, portable electronics, radars, aerospace, and military.

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Mechanical and Electromagnetic Shielding Properties of Carbon Foam

Feng

Shi

et al. 2021

Adv Eng Mater

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More importance is being attached to the harm caused by electromagnetic interference (EMI) problems. Plenty of research in this field has used carbon foam materials to solve EMI, and some excellent results are obtained, whereas the mechanical properties of carbon foam are poor, which limit applications in particular fields. The physical mechanism of electromagnetic shielding is unanswered and further study is needed. Herein, a kind of carbon foam material is obtained by the templating method; the effect of foam structure on the electromagnetic shielding properties of the carbon foam material is investigated through experiment and simulation. The electromagnetic shielding performance, mechanical properties, and thermal stability of carbon foam are also studied. The electromagnetic shielding performance of carbon foam material is 20 dB in the X‐band range with the thickness and density as 2 mm and 0.121 g cm−3, respectively. In addition, the compressive strength of the carbon foam is 0.55 MPa.

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Porous superhydrophobic polymer/carbon composites for lightweight and self-cleaning EMI shielding application

Cited by 157 publications

References 52 publications

Photoreactive composite coating with composition dependent wetting properties

Photoreactive composite coating with composition dependent wetting properties

Fabrication of Nonwetting Flexible Free‐Standing MXene‐Carbon Fabric for Electromagnetic Shielding in S‐Band Region

Mechanical and Electromagnetic Shielding Properties of Carbon Foam

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