Effect of plasma pretreatment on adhesion and mechanical properties of sol-gel nanocomposite coatings on polycarbonate

Raju, K. R. C. Soma; Sowntharya, L.; Lavanya, S.; Subasri, R.

doi:10.1080/15685543.2012.702580

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…No signi cant changes in WCA were detected with increase in plasma exposure time. It is obvious that the contact angle reduction by DBD in open air was higher than PC treated by atmospheric air (43°) [22] and in N 2 plasma (60° for 1 min treatment) [23]. It proved that more wettability was obtained by DBD system used in this work.…”

Section: Dbd Preparation Of the Pc Substratesmentioning

confidence: 53%

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Producing of high-transparent antiscratch nanohybrid thin films on polycarbonate substrate

Kiomarsipour

Eshaghi

Ramazani

et al. 2022

Preprint

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In the present work, a new aqueous sol–gel procedure has been used for producing hard transparent organic–inorganic nanohybrid coatings on polycarbonate (PC) substrate for improving its optical and mechanical properties. Sol-gel thins films were prepared by mixing Si and Al aqueous precursors and applied them on the cold plasma treated PC substrate. TEOS, GPTMS and aluminum tri sec-butoxide were used as main precursors. In order to improve the adhesion strength onto polymer, PC substrates were treated by Dielectric Barrier Discharge (DBD) system being conducted at atmosphere pressure in open air. The effects of sol ratios, curing temperature and aging time on the prepared coatings properties were investigated. Chemical, structural, morphological, optical and mechanical characteristics of the samples were studied by ATR-FTIR, EDS, XRD, FE-SEM, TEM, UV/vis spectroscopy, pencil hardness and eraser scratch methods. The obtained results indicated that the water contact angle of PC (73.24°) decreased to 6.32° by 45 second plasma treatment due to added functional groups on the treated surfaces. All of the films showed higher optical transmittance (89%) than the raw PC (86%) that was stemmed from the lower refractive index of the prepared films. Films indicated good adhesion onto the plasma treated substrates (5B). The pencil hardness of the PC substrate (4B) improved to 3H (8 pencil grade increment) with just a single layer coating (about 200 nm thickness) due to the preparation of new hard structures of interlocked Si and Al atoms.

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Section: Dbd Preparation Of the Pc Substratesmentioning

confidence: 53%

“…There was no sol left on the substrate. After plasma treatment due to polar groups made on the surface adhesion was improved [22,24,25]. Figure 3 Figure 4 shows the ATR-FTIR spectra of the PC substrates before and after plasma treatment.…”

Section: Dbd Preparation Of the Pc Substratesmentioning

confidence: 99%

Producing of high-transparent antiscratch nanohybrid thin films on polycarbonate substrate

Kiomarsipour

Eshaghi

Ramazani

et al. 2022

Preprint

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“…Finally, abrasion resistance tends to be better with thicker coating as Sowntharya et al [73] who work on hybrid Si/Ti sol suggest by comparing thick GPTMS-based (GB) coating with thin MPTMS-based (MB) coating. The problem in this specific case is the difficulty to conclude because of the difference of hardness between both coatings, around 0.1 and 0.5 GPa for GB and MB coatings, respectively [18].…”

Section: Process Parameters Influence 41 Thicknessmentioning

confidence: 85%

Mechanical properties of sol–gel coatings on polycarbonate: a review

Bail

Benayoun

Toury

2015

J Sol-Gel Sci Technol

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Organic/inorganic hybrid coatings prepared via the sol-gel process have received lot of interests during the early twenty-first century. Devices obtained thanks to this low-temperature route display a large panel of bulk and surface properties that can be modulated according to the target. Moreover, this versatility enables to offer solutions in various domains and industrial applications such as microelectronics, optic, aeronautic, automotive, health. When the aimed application required polymer as substrate, the use of sol-gel process takes its full interest as soft chemistry. This review is dedicated to mechanical properties improvement of a common polymer substrate, e.g., polycarbonate, when a transparent sol-gel coating recovered it. Graphical Abstract

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“…In the case of the air plasma modification of the support, a slight decrease in the water contact angle on the coating can be observed (sample #1 compared to #2 and sample #4 compared to #5), while argon plasma modification causes a slight increase of the contact angle (sample #1 compared to #3) or does not affect surface wettability (sample #4 compared to #6). Moreover, plasma activation will improve the coatings adhesion [57,58]. However, it is necessary to carry specialized durability tests out in order to investigate this phenomenon.…”

Section: Resultsmentioning

confidence: 99%

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

et al. 2021

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In this paper, we focus on fabrication and physicochemical properties investigations of silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) composite coatings deposited on the glass supports activated by cold plasma. Air or argon was used as the carrier gas in the plasma process. Multiwalled carbon nanotubes were modified with poly(dimethylsiloxane) in order to impart their hydrophobicity. The silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) nanocomposite was synthesized using the sol–gel technique with acid-assisted tetraethyl orthosilicate hydrolysis. The stability and the zeta potential of the obtained suspension were evaluated. Then, the product was dried and used as a filler in another sol–gel process, which led to the coating application via the dip-coating method. The substrates were exposed to the hexamethyldisilazane vapors in order to improve their hydrophobicity. The obtained surfaces were characterized by the wettability measurements and surface free energy determination as well as optical profilometry, scanning electron microscopy, and transmittance measurements. In addition, the thermal analyses of the carbon nanotubes as well as coatings were made. It was found that rough and hydrophobic coatings were obtained with a high transmittance in the visible range. They are characterized by the water contact angle larger than 90 degrees and the transmission at the level of 95%. The X-ray diffraction studies as well as scanning electron microscopy images confirmed the chemical and structural compositions of the coatings. They are thermally stable at the temperature up to 250 °C. Moreover, the thermal analysis showed that the obtained composite material has greater thermal resistance than the pure nanotubes.

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Effect of plasma pretreatment on adhesion and mechanical properties of sol-gel nanocomposite coatings on polycarbonate

Cited by 15 publications

References 24 publications

Producing of high-transparent antiscratch nanohybrid thin films on polycarbonate substrate

Producing of high-transparent antiscratch nanohybrid thin films on polycarbonate substrate

Mechanical properties of sol–gel coatings on polycarbonate: a review

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

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