Deposition of Super‐Hydrophobic and Oleophobic Fluorocarbon Films in Radio Frequency Glow Discharges

Laguardia, L.; Ricci, D.; Vassallo, E.; Cremona, A.; Mesto, Ernesto; Grezzi, F.; Dell’Era, F.

doi:10.1002/masy.200750133

Cited by 25 publications

(32 citation statements)

References 14 publications

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“…Inspection of the as-deposited spectra shows loss of the monomer peaks at 1425, 967 and 990 cm -1 corresponding to loss of the C=C bonds of the vinyl group. Both vapour and liquid deposited samples show slight peaks in the region 1700 -1800 cm -1 which may suggest some C=O formation [11], [13], [14] in agreement with the XPS analysis. The vapour deposited samples also showed peaks below 3000 cm -1 indicative of saturated alkane chemistry and confirming polymerisation has occurred through the vinyl group.…”

Section: Resultssupporting

confidence: 82%

“…These values are lower than expected from the starting monomer indicating that some degradation of the monomer has occurred, as is typical of all such plasma processes [6], [10], [11], [14]. However, approximately 80% of the perfluoro chain has been retained intact, which compares favourably with previously reported soft plasma polymerisation processes [16].…”

Section: Resultssupporting

confidence: 80%

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A direct comparison between gas state and atomised liquid state precursor in the deposition of functional coatings by pin corona plasma

Herbert¹,

Jaroszyńska-Wolińska

2011

Eur. Phys. J. Appl. Phys.

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An atmospheric pressure non-thermal equilibrium pin corona plasma jet was used to deposit polymeric coatings from monomer precursor in both vapour and liquid aerosol states to allow a direct comparison of the quality and performance of the as-deposited coatings, specifically with respect to the achievement of soft plasma polymerisation (SPP) where the coating exhibits minimal fragmentation or damage to the monomer molecule while, at the same time, being highly cross-linked. A long chain perfluorocarbon molecule was introduced into the helium plasma and coatings deposited at rates of up to 50 nm/min. XPS, FTIR, contact angle and ellipsometric measurements indicated that a controlled polymerization reaction had taken place in the case of the vapour deposited samples through the vinyl group of the monomer, with only minor fragmentation of the functional perfluoro chain. Furthermore, a high level of cross-linking was achieved and the coatings were stable to a toluene wash. In contrast, while the liquid deposition samples showed good retention of monomer molecular structure, they exhibited negligible cross-linking and were readily removed by immersion in toluene rendering them functionally useless.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 80%

A direct comparison between gas state and atomised liquid state precursor in the deposition of functional coatings by pin corona plasma

Herbert¹,

Jaroszyńska-Wolińska

2011

Eur. Phys. J. Appl. Phys.

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“…Inspection of the spectra from the as‐deposited samples shows loss of the monomer peaks at 1 425, 967 and 990 cm −1 corresponding to loss of the CC bonds of the vinyl group. Both vapour and liquid deposited samples show slight peaks in the region 1 700–1 800 cm −1 which may suggest some CO formation 24, 25. The small peak at 1 350 cm −1 observed in all coated samples may be due to the CF vibration 25.…”

Section: Resultsmentioning

confidence: 85%

A Comparison between Gas and Atomized Liquid Precursor States in the Deposition of Functional Coatings by Pin Corona Plasma

Herbert¹,

O’Neill²,

Jaroszyńska-Wolińska

et al. 2011

Plasma Processes & Polymers

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This work directly compares vapour and liquid aerosol states for the deposition of perfluorocarbon coatings using an atmospheric pressure, non‐thermal equilibrium plasma jet system. The objective of the study is to evaluate how the physical state of the precursor (gas or liquid), influences the fragmentation of the monomer molecules in the plasma and the subsequent coating properties. Specifically the effect of gas or liquid aerosol precursor feed on the ability to achieve a soft plasma polymerization (SPP) is assessed with a view to producing a coating that exhibits minimal fragmentation, while being well cross‐linked. The precursor (perfluoro‐1‐decene) was introduced into a helium plasma and coatings deposited at rates of up to 50 nm · min−1. The deposited coatings were examined using XPS, FTIR, contact angle and ellipsometric measurements. These indicated that a controlled polymerization reaction through the vinyl group of the monomer had taken place in the case of the gas deposited samples with only minor fragmentation of the functional perfluoro chain. Furthermore, a high level of cross‐linking was achieved and the perfluorocarbon coatings were stable to a toluene wash. In contrast, while coatings deposited using the liquid deposition technique showed good retention of monomer molecular structure, they exhibited poor stability when immersed in toluene. This is attributed to lower levels of cross‐linking of the liquid precursor in the plasma, compared with coatings deposited using the gaseous precursor technique. magnified image

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“…The sharp and intense peaks at 1 205 and 1 149 cm −1 are attributed to the asymmetric stretching and symmetric stretching of the CF 2 groups, respectively. The IR peak at 1 234 cm −1 represents to the CF stretching vibration overlapped with the CH 2 wagging 44–46. A small absorption peak at 1 119 cm −1 is attributed to the CO stretching overlapped with the tail of the CF x band.…”

Section: Resultsmentioning

confidence: 97%

Amphiphilic Copolymer Coatings via Plasma Polymerisation Process: Switching and Anti‐Biofouling Characteristics

Kumar

Pulpytel

Giudetti

et al. 2011

Plasma Processes & Polymers

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Environmentally benign‐solvent free plasma process is employed to produce nanostructured PFDA‐co‐DEGDME amphiphilic coatings via plasma co‐polymerisation of 1H,1H,2H,2H‐perfluorodecyl acrylate (PFDA) and diethyleneglycol dimethyl ether (DEGDME) precursors in a low pressure‐RF‐inductively excited tubular plasma reactor using argon as a carrier gas. The plasma‐polymerised coatings are characterised by Fourier transform infrared spectroscopy (FT‐IR), X‐ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM) and contact angle measurements. PFDA‐co‐DEGDME coatings with varying chemical environments and morphologies are achieved by varying the plasma parameters such as, continuous wave (CW) and pulse modulated (PM) plasma mode, and plasma deposition time. Plasma polymerised PFDA‐co‐DEGDME coatings are found to exhibit a switching property in terms of wettability, i.e., from hydrophobic to hydrophilic and vice versa, in response to the contacting environment. Quartz crystal microbalance (QCM) is used to study the adhesion of two model proteins, namely, human serum albumin (HSA) and fibrinogen (FGN) in continuous flow conditions, which reveals the protein repellent, i.e., anti‐biofouling characteristics of the PFDA‐co‐DEGDME amphiphilic coatings.

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Deposition of Super‐Hydrophobic and Oleophobic Fluorocarbon Films in Radio Frequency Glow Discharges

Cited by 25 publications

References 14 publications

A direct comparison between gas state and atomised liquid state precursor in the deposition of functional coatings by pin corona plasma

A direct comparison between gas state and atomised liquid state precursor in the deposition of functional coatings by pin corona plasma

A Comparison between Gas and Atomized Liquid Precursor States in the Deposition of Functional Coatings by Pin Corona Plasma

Amphiphilic Copolymer Coatings via Plasma Polymerisation Process: Switching and Anti‐Biofouling Characteristics

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