A parametric study on processing of scratch resistant hybrid sol–gel silica coatings on polycarbonate

Yavaş, Hakan; Selcuk, Cem; Ozhan, A.E.S.; Durucan, Caner

doi:10.1016/j.tsf.2014.01.024

Cited by 19 publications

(10 citation statements)

References 33 publications

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“…Higher hardness values are measured for thicker coatings, from 30 HV 1 to 250 HV 1 for a thickness around 2.2-8.0 lm, respectively. In this system, it is suggested that fast solvent evaporation occurring for thin coating leads to the formation of pores (detected by SEM) [7]. Indeed, in this specific case, hardness changes are more linked to the coating density than to its thickness.…”

Section: Process Parameters Influence 41 Thicknessmentioning

confidence: 92%

“…The most traditional remains the oven curing with a treatment typically ranged from 80 to 135°C [7,13,62,72], necessary inferior to 140°C to preserve polycarbonate. Since oven curing tends to accelerate sol-gel reactions by a faster solvent evaporation, it is an important parameter to control.…”

Section: Curing Processmentioning

confidence: 99%

“…(3-glycidoxypropyl)methyltrimethoxysilane, TEOS: tetraethoxysilane) can reach a hardness of 71 ± 25 HV [7] and a Young modulus of 10 GPa [8,9] when PC hardness is only 13 ± 2 HV [7,10] and Young's modulus is around 3 GPa [9].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Process Parameters Influence 41 Thicknessmentioning

confidence: 92%

Section: Curing Processmentioning

confidence: 99%

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

Bail

Benayoun

Toury

2015

J Sol-Gel Sci Technol

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“…UV-curable coating systems can be modified by incorporating different monomeric groups. Utilization of fluorosilane structures is one of the effective methods for modification of UV-curable systems, especially for the improvement of surface characteristics [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Coating Performance of UV-Curable Hybrid Polymers Containing 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Coated on Aluminum Substrates

Çakır

2017

Coatings

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This study describes preparation and characterization of fluorine-containing organicinorganic hybrid coatings. The organic part consists of bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin and 1,6-hexanediol diacrylate reactive diluent. The inorganically rich part comprises trimethoxysilane-terminated urethane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 3-(trimethoxysilyl) propyl methacrylate and sol-gel precursors that are products of hydrolysis and condensation reactions. Bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin was added to the inorganic part in predetermined amounts. The resultant mixture was utilized in the preparation of free films as well as coatings on aluminum substrates. Thermal and mechanical tests such as DSC, thermo-gravimetric analysis (TGA), and tensile and shore D hardness tests were performed on free films. Water contact angle, gloss, Taber abrasion test, cross-cut and tubular impact tests were conducted on the coated samples. SEM examination and EDS analysis was performed on the fractured surfaces of free films. The hybrid coatings on the aluminum sheets gave rise to properties such as moderately glossed surface; low wear rate and hydrophobicity. Tensile strength of free films increased with up to 10% inorganic content in the hybrid structure and this increase was approximately three times that of the control sample. As expected; the % strain value decreased by 17.3 with the increase in inorganic content and elastic modulus values increased by a factor of approximately 6. Resistance to ketone-based solvents was proven and an increase in hardness was observed as the ratio of the inorganic part increased. Samples which contain 10% sol-gel content were observed to provide optimal properties.

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“…The current trend focuses on making versatile coatings which cater the technological needs like scratch resistance, self cleanability, super-amphiphobicity etc. [4][5][6]. which pose potential industrial usage.…”

Section: Introductionmentioning

confidence: 99%