Surface functionalization of silk fabric by PTFE sputter coating

Huang, Fenglin; Wei, Qufu; Liu, Ya; Gao, Weidong; Huang, Yubo

doi:10.1007/s10853-007-1580-3

Cited by 44 publications

(26 citation statements)

References 5 publications

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“…As reported in the literature, the contact angle of PTFElike films, deposited by RF Sputtering, depends on Ar ionbeam energy [40,41]. Basically, when large moieties of CF 2 and CF 3 groups are generated, the surface energy is reduced and thus the contact angle increases.…”

Section: Refractive Index Measurementmentioning

confidence: 87%

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Adjustable, (super)hydrophobicity by e-beam deposition of nanostructured PTFE on textured silicon surfaces

et al. 2015

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Polytetrafluoroethylene (PTFE)-like films, produced by electron beam (e-beam) deposition, have shown higher hydrophobicity than those deposited by RF sputtering under similar deposition rates. It was found that this results from both surface chemical composition and nano-roughness. X-ray photoelectron spectroscopy measurements revealed that larger moieties of CF 2 and CF 3 groups were present to reduce surface energy in the e-beam deposited films. RF sputtering led to a higher degree of PTFE target fragmentation producing a different perfluorinated film on the Si substrate. Scanning electron microscopy and atomic force microscopy measurements revealed a much larger rms roughness on the film surfaces produced by e-beam (25.13 nm, at 20 mA) than those by RF sputtering (2.42 nm, at 100 W), and allowed a broad power spectrum density analysis with determination of the j B wetting parameter. In addition, the e-beam deposited films presented a linear increase of contact angle with applied electron current in the range under study (5-20 mA). This allows easy water repellency adjustment, up to 159 ± 2°. For a superhydrophobic state with self-cleaning, a micropyramid structure was wet etched on the Si wafer, followed by PTFE deposition, and a very low contact angle (163 ± 2°) and hysteresis was attained (\3°). These first results indicate that e-beam PTFE deposition with adjustable hydrophobicity may become a useful technique for integrated production with present Si microelectronics technology and for Si solar cells.

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Section: Refractive Index Measurementmentioning

confidence: 87%

“…Previous reports are present in the literature on the properties of PTFE-sputtered films [39][40][41]. Particularly regarding chemical composition, wettability, and morphology, RF-sputtered PTFE coatings were grown under several bias voltages and gas compositions on silicon wafers [42,43].…”

Section: Introductionmentioning

confidence: 99%

Adjustable, (super)hydrophobicity by e-beam deposition of nanostructured PTFE on textured silicon surfaces

et al. 2015

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“…The contact angle of the PTFE coated fabric showed an increase from 68° to about 138°. The larger sputtering pressures brought less contact angle hysteresis [25]. The different films exhibited contact angles from 119° up to 153°, depending on the preparation conditions.…”

Section: Pfp Coatings On Fabricsmentioning

confidence: 98%

Protective applications of vacuum-deposited perfluoropolymer films

Grytsenko¹

2016

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. The paper summarizes in brief applications of perfluoropolymer thin films deposited from the gas phase by several different methods, for protection of various materials and devices both at the research stage and already in industry. Perfluoropolymer films protect from corrosion coated metals, attain superhydrophobic properties to various surfaces, enhance the lifetime of medical implants, passivating the surface of semiconductors, protect functional layers in organic light emitting diodes, field effect transistors etc. Organic molecules in the PTFE matrix revealed extreme stability and presents the new material for optical applications.

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“…The untreated and treated waste silk demonstrated rough bands in the region 1660-1630 cm −1 , which were attributed to the stretching vibration of amide I. Other characteristics peaks found at 1545-1525 cm -1 are the amide II and 1265-1235 cm −1 is the amide III [33,34]. The FT-IR spectra of sample wSF-PDA and wSF-PDA/Fe showed a characteristic bending at 570 cm −1 [35,36], indicating the formation of Fe-O due to the presence of PDA [30] and subsequent loading of iron particles.…”

Section: Fourier Transform Infrared (Ft-ir) Analysismentioning

confidence: 98%

Dopamine Grafted Iron-Loaded Waste Silk for Fenton-Like Removal of Toxic Water Pollutants

et al. 2019

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Dispersion of iron was achieved on waste silk fibers (wSF) after grafting of polydopamine (PDA). The catalytic activity of the resulting material (wSF-DA/Fe) was investigated in Fenton-like removal of toxic aromatic dyes (Methylene Blue, Cationic Violet X-5BLN, and Reactive Orange GRN) water. The dye removal yield reached 98%, 99%, and 98% in 10–40 min for Methylene Blue, Cationic Violet X-5BLN, and Reactive Orange GRN, respectively. The catalytic activity was explained in terms of the effects of temperature, dyes, and electrolytes. In addition, the kinetic study showed that the removal of dyes followed pseudo-1st order adsorption kinetics. These findings allow envisaging the preparation of fiber-based catalysts for potential uses in environmental and green chemistry.

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Surface functionalization of silk fabric by PTFE sputter coating

Cited by 44 publications

References 5 publications

Adjustable, (super)hydrophobicity by e-beam deposition of nanostructured PTFE on textured silicon surfaces

Adjustable, (super)hydrophobicity by e-beam deposition of nanostructured PTFE on textured silicon surfaces

Protective applications of vacuum-deposited perfluoropolymer films

Dopamine Grafted Iron-Loaded Waste Silk for Fenton-Like Removal of Toxic Water Pollutants

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