Abrasion-resistant coatings for plastic and soft metallic substrates by sol–gel reactions of a triethoxysilylated diethylenetriamine and tetramethoxysilane

Li, Chenghong; Jordens, Kurt; Wilkes, Garth L.

doi:10.1016/s0043-1648(00)00408-7

Cited by 42 publications

(21 citation statements)

References 8 publications

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“…Since oven curing tends to accelerate sol-gel reactions by a faster solvent evaporation, it is an important parameter to control. It influences hardness, which is higher with a long treatment [74]. Fabbri et al also confirm that thermal curing is effective in promoting the cross-linking density of the hybrid system.…”

Section: Curing Processmentioning

confidence: 91%

“…Indeed, by increasing sol viscosity, coating thickness increases in the same way, all implementation parameters being equal. Li et al [74] notice that by increasing the OH/SiOR ratio from 1.1 to 4.4, transmittance after 500 cycles of abrasion (using a pair of CS10 wheels, 0.5 kg load each) increases from 86 to 98 % indicating a clear abrasion resistance enhancement. Same tendency is observed with hydrolysis time increasing (from 3.5 to 7.5 h).…”

Section: Aging Timementioning

confidence: 99%

“…In this context, a surface treatment (chemical, plasma, adherence promoter, etc) of the PC is commonly reported in order to enhance it [4,74]. Moreover, if this implementation is usual, studies reporting surface treatment effect on mechanical properties of the final coating are infrequent.…”

Section: Substrate/coating Interfacementioning

confidence: 99%

See 2 more Smart Citations

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: Curing Processmentioning

confidence: 91%

Section: Aging Timementioning

confidence: 99%

See 1 more Smart Citation

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

Bail

Benayoun

Toury

2015

J Sol-Gel Sci Technol

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“…While it is well known that in general the abrasion resistance of a material can be correlated to its surface hardness, 20 for organic-inorganic hybrid materials, the latter can be further linked to the crosslinking density reached by means of postcuring treatments. 15,21,22 For this reason, 29 Si MAS-NMR represents a useful tool for a direct comparison of the effectiveness of thermal and MW-assisted curing of organic-inorganic hybrid materials. Figure 3 shows the peak fitting of the Q set of peaks of 29 Si MAS-NMR spectra, in the spectral region between −140 and −60 ppm, for the PEOSiSiO 2 (20/80 wt/wt) dried sols subjected to either MW-assisted or thermal curing.…”

Section: Si Mas-nmrmentioning

confidence: 99%

Enhancing the scratch resistance of polycarbonate with poly(ethylene oxide)–silica hybrid coatings

et al. 2008

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Scratch-resistant coatings for bisphenol-A polycarbonate sheets were obtained by the sol-gel synthesis of an organic-inorganic hybrid system based on poly(ethylene oxide) and silica. The organic-inorganic hybrids were thermally cured into hard transparent coatings by using conventional and microwave (MW) ovens. Both techniques proved to be equally efficient in promoting the system's crosslinking, as evaluated by 29 Si MAS-NMR. The MW-assisted curing, however, was much faster. Photoelasticity analysis showed that MW-assisted curing causes localized overheating of the samples, inducing a state of residual plane stresses that bring about dimensional instability of the coated material. Instrumented scratch tests for the coated samples revealed an increase of 1 order of magnitude in the minimal load at which a scratch track appears on the sample surface. However, the friction coefficient values for samples with thermally cured coatings were lower than those produced by MW-assisted curing.

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“…For example, ceramic coatings directly obtained from the sol-gel process of alkoxysilane exhibited better scratch resistance, abrasion resistance, hardness, as well as high optical clarity and could be cast on glass, [6] polycarbonate,poly(methylmethacrylate)(PMMA), and steel substrates. [7] Poly(methyl methacrylate)/SiO 2 hybrids were prepared from the sol-gel process of tetraethoxysilane (TEOS) in PMMA solution [8] or MMAtrimethoxysilylpropyl methacrylate (TMSPM) copolymer, [9] or the in situ polymerization of MMA solution containing TMSPM modified colloidal silica particles, [10] and correspondingly offered the coatings with improved thermal stability, abrasion resistance, and high hardness.…”

Section: Introductionmentioning

confidence: 99%

Acrylic‐Based Polyurethane/Silica Hybrids Prepared by Acid‐Catalyzed Sol–Gel Process: Structure and Mechanical Properties

Chen

Zhou

et al. 2005

Macro Chemistry & Physics

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Summary: Silica sols were first prepared based on different ratios of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) by an acid‐catalyzed sol–gel process, and then incorporated into acrylic‐based polyurethanes. The structures and morphologies of silicone‐oxo clusters were studied by 29Si NMR, SAXS, and scanning electron microscopy (SEM), whereas the mechanical properties of polyurethane/silica hybrids were characterized by DMA and tensile tests. The silicone‐oxo clusters in both silica sol and polyurethane hybrids became denser and larger at a higher molar ratio of TEOS/MTES and higher silica content, and the silica‐oxo clusters of polyurethane/silica hybrids even became more compact and larger than those of silica sols, increasing the elastic modulus and tensile strength of polyurethane/silica hybrids.Typical structure of silica sol prepared from the hydrolysis and condensation of TEOS and MTES with acid as the catalyst.magnified imageTypical structure of silica sol prepared from the hydrolysis and condensation of TEOS and MTES with acid as the catalyst.

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Abrasion-resistant coatings for plastic and soft metallic substrates by sol–gel reactions of a triethoxysilylated diethylenetriamine and tetramethoxysilane

Cited by 42 publications

References 8 publications

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

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

Enhancing the scratch resistance of polycarbonate with poly(ethylene oxide)–silica hybrid coatings

Acrylic‐Based Polyurethane/Silica Hybrids Prepared by Acid‐Catalyzed Sol–Gel Process: Structure and Mechanical Properties

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