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Polyvinylidene Fluoride/Reduced Graphene Oxide Layers on SiOxNy/Poly(ethylene terephthalate) Films as Transparent Coatings for Organic Electronic Devices and Packaging Materials
ACS Applied Nano Materials ( IF 5.9 ) Pub Date : 2020-09-02 , DOI: 10.1021/acsanm.0c01706
Seo Gyun Kim 1, 2 , Nam-Ho You 2 , Bon-Cheol Ku 2 , Heon Sang Lee 1
Affiliation  

Transparent, high gas barrier films are crucial in the medical, food, and electronic industries. The main properties required for electronic devices such as flexible displays include transmittance of >90% and oxygen transmission rates (OTRs) and water vapor transmission rates (WVTRs) of 10–3 to 10–6 cc(g) m–2 day–1. Herein, we report reduced graphene oxide (rGO)/inorganic and organic/inorganic composites coated on poly(ethylene terephthalate) (PET) film with superior oxygen and water vapor barrier properties and high transmittance. The OTR (at 23 °C, 0% relative humidity) and WVTR (at 37.8 °C, 100% relative humidity) values of the composite films (140 μm) decreased by 8 × 104 times and 6.71 × 102 times, respectively, relative to those of the PET substrate film (125 μm). The transmittance of the composite films at 550 nm was 84%, corresponding to only a 9% decrease compared to that of the PET film. Additionally, with only nanolayers of SiOxNy (100 nm) and rGO (13 nm) coating on the PET substrate, the OTR and WVTR were reduced by 2000 times and 470 times, respectively. A polyvinylidene fluoride/rGO (PVDF/rGO) layer on the SiOxNy/PET substrate showed 8.8 × 105 times lower oxygen permeability and 1.6 × 104 times lower water permeability compared to those of PVDF/rGO on the PET substrate, implying that the inorganic SiOxNy nanolayer is crucial, affording a synergistic effect toward the barrier film. The gas permeabilities of the composite films strongly depend on the design of the coating structure, rGO content, and blend ratio of PVDF and PMMA; this allows efficient control of the nanodefects of the composite film. This study shows the significance of inorganic materials and the synergistic effect of composites on barrier films, which are required for applications in organic electronic devices and packaging materials.

中文翻译:

SiO x N y /聚对苯二甲酸乙二酯薄膜上的聚偏二氟乙烯/氧化石墨烯层作为有机电子设备和包装材料的透明涂层

透明的高阻气膜在医疗,食品和电子行业中至关重要。电子设备(如柔性显示器)所需的主要特性包括> 90%的透射率和10 –3至10 –6 cc(g)m –2–1的氧气透过率(OTR)和水蒸气透过率(WVTR)。。本文中,我们报道了在聚对苯二甲酸乙二醇酯(PET)薄膜上涂覆的氧化石墨烯(rGO)/无机和有机/无机复合材料具有优异的氧气和水蒸气阻隔性能以及高透射率。复合膜(140μm)的OTR(在23°C,相对湿度0%时)和WVTR(在37.8°C,相对湿度100%)值分别降低了8×10 4倍和6.71×102次,分别相对于那些PET基底薄膜(125微米)的。复合膜在550nm处的透射率为84%,与PET膜相比仅降低了9%。此外,仅在PET基板上涂覆SiO x N y(100 nm)和rGO(13 nm)纳米涂层,OTR和WVTR分别减少了2000倍和470倍。SiO x N y / PET基材上的聚偏二氟乙烯/ rGO(PVDF / rGO)层的氧渗透率比PET基材上的PVDF / rGO低8.8×10 5倍,透水性低1.6×10 4倍,暗示无机SiO x N y纳米层是至关重要的,它对阻挡膜具有协同作用。复合膜的透气性在很大程度上取决于涂层结构的设计,rGO含量以及PVDF和PMMA的混合比。这允许有效控制复合膜的纳米缺陷。这项研究表明了无机材料的重要性以及复合材料对阻隔膜的协同作用,这是有机电子器件和包装材料中应用所必需的。
更新日期:2020-09-25
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