Ultra-thin hybrid organic/inorganic gas barrier coatings on polymers

Singh, Brij Mohan; Bouchet, J.; Rochat, G.; Leterrier, Y.; Månson, J.-Å. E.; Fayet, Pierre

doi:10.1016/j.surfcoat.2007.01.013

Cited by 45 publications

(32 citation statements)

References 32 publications

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“…Increasing the concentration beyond this value did not improve further the barrier properties. The present results being alike those obtained with thermally curable silanes suggests that similar reactions have occurred as detailed in [23,25]. At 2 wt.% concentration the silane reacted with the hydrated silica surface and formed a cross-linked polysiloxane layer with low oxygen permeability, resulting in the observed two-fold reduction of OTR.…”

Section: Resultssupporting

confidence: 87%

“…Temperature during UV curing rose to 60°C, because of the UV-lamp and no external heating was provided. The thickness of the silane coating obtained at maximum line speed was estimated to be of the order of 100 nm, based on previous data for thermally curable silane coatings also produced from dilute solutions in ethanol [23]. The thickness of these thermally curable silane coatings was measured using transmission electron microscopy and found to be in the range from 10 to 500 nm depending on initial concentration.…”

Section: Coating Methodsmentioning

confidence: 96%

“…Silane solutions in ethanol in concentrations ranging from 1 wt.% to 20 wt.% were spin-coated onto the SiO 2 /PET film at 1000 rpm for 20 s, leading to silane coating thickness ranging from approx. 10 nm to 500 nm [23]. Roll coating was used to produce samples for OTR vs. strain tests, also detailed in the following.…”

Section: Coating Methodsmentioning

confidence: 99%

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Supertough UV-curable silane/silica gas barrier coatings on polymers

Leterrier¹,

Singh²,

Bouchet³

et al. 2009

Surface and Coatings Technology

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Ultra-thin (10-500 nm) photo-polymerized γ-methacryloxypropyltriethoxysilane (MPMS) and vinyltrimethoxysilane (VTS) layers applied to SiO 2 coatings on polyethylene terephthalate films improved the oxygen barrier performance of the oxide coated films by more than two-fold, and the coating strain to failure from 1.5% to beyond 5%, depending on the processing conditions. The oxygen transmission rate of composite films was measured under tensile strain. The chemical conversion of both MPMS and VTS with two different photoinitiators was studied by means of photo-calorimetry experiments, with attention paid to the influence of temperature, UV-light intensity and photoinitiator concentration. The conversion data were analyzed using an n th -order kinetic model, including an Arrhenius dependence of the temperature and a power-law dependence of the light intensity on the reaction rate. The improvement in mechanical integrity of the silane/silica barrier coating, with a toughness as high as 80 J/m 2 was found to be controlled by the conversion state of the silane.

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Section: Resultssupporting

confidence: 87%

Section: Coating Methodsmentioning

confidence: 96%

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Supertough UV-curable silane/silica gas barrier coatings on polymers

Leterrier¹,

Singh²,

Bouchet³

et al. 2009

Surface and Coatings Technology

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“…Dark spot could also be identified as pinholes in the aluminum layer. The studies realized by Singh et al 12 and Roberts et al 13 report that the thin inorganic coatings present a lattice disorder with ''nano-defects'' and ''macrodefects'' resulting from the deposition process. According to these authors, nano-defects (<1 nm) result from the out-of-equilibrium growth mechanisms, while macro-defects (>1 nm) comprise socalled pinholes and microcracks, whose density is controlled by the surface quality of the polymer substrate.…”

Section: Heterogeneitiesmentioning

confidence: 99%

Influence of structural feature of aluminum coatings on mechanical and water barrier properties of metallized PET films

Garnier

Yrieix

Bréchet

et al. 2009

J of Applied Polymer Sci

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This article focuses on description and evaluation of multilayer films, which are used for vacuum insulation panels (VIP). The materials investigated include a neat polyethylene terephthalate (PET) and PET films coated by chemical vapor deposition with different aluminum thicknesses. The aim of these investigations was to evaluate the influence of structural features on the physical properties of Al/PET systems. The morphological analyzes associated to water vapor permeability measurements showed that the metallized surface exhibited defects through which a small amount of water vapor can permeate. It is shown that the permeance varies linearly with the surface fraction occupied by pinholes which in turn changes linearly with the aluminum thickness.

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“…Therefore, alternating organic and inorganic thin layers are usually employed as barrier coatings for the purpose of decoupling such defects. 10,11 The crystalline inorganic layers hinders water and oxygen ingress, whereas the amorphous organic layers tend to minimize pin holes by planarizing the inorganic barrier coating.…”

Section: Introductionmentioning

confidence: 99%

Multilayer thin film encapsulation for organic light emitting diodes

et al. 2014

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A transparent and effective thin film encapsulation (TFE) based on a multilayer structure is demonstrated. Alternate films of amorphous and crystalline film forming organic materials have been investigated to create complicated diffusion pathways for oxygen and water vapour, which was reflected in their increased barrier properties. These layers are further protected by an inorganic barrier coating of magnesium fluoride (MgF 2 ) deposited by normal and glancing angle deposition methods. A significant enhancement of more than 8 times in the lifetime of organic light emitting diodes was obtained by employing this multilayer hybrid geometry. The TFE structure can be highly useful in organic optoelectronic devices requiring easy to deposit and an effective barrier layer for enhanced lifetimes.

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Ultra-thin hybrid organic/inorganic gas barrier coatings on polymers

Cited by 45 publications

References 32 publications

Supertough UV-curable silane/silica gas barrier coatings on polymers

Supertough UV-curable silane/silica gas barrier coatings on polymers

Influence of structural feature of aluminum coatings on mechanical and water barrier properties of metallized PET films

Multilayer thin film encapsulation for organic light emitting diodes

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