Process Parameter Optimization of a Polymer Derived Ceramic Coatings for Producing Ultra-High Gas Barrier

Abstract

Silica is one of the most efficient gas barrier materials, and hence is widely used as an encapsulating material for electronic devices. In general, the processing of silica is carried out at high temperatures, i.e., around 1000 °C. Recently, processing of silica has been carried out from a polymer called Perhydropolysilazane (PHPS). The PHPS reacts with environmental moisture or oxygen and yields pure silica. This material has attracted many researchers and has been widely used in many applications such as encapsulation of organic light-emitting diodes (OLED) displays, semiconductor industries, and organic solar cells. In this paper, we have demonstrated the process optimization of the conversion of the PHPS into silica in terms of curing methods as well as curing the environment. Various curing methods including exposure to dry heat, damp heat, deep UV, and their combination under different environments were used to cure PHPS. FTIR analysis suggested that the quickest conversion method is the irradiation of PHPS with deep UV and simultaneous heating at 100 °C. Curing with this method yields a water permeation rate of 10−3 g/(m2⋅day) and oxygen permeation rate of less than 10−1 cm3/(m2·day·bar). Rapid curing at low-temperature processing along with barrier properties makes PHPS an ideal encapsulating material for organic solar cell devices and a variety of similar applications.

UV Blocking and Oxygen Barrier Coatings Based on Polyvinyl Alcohol and Zinc Oxide Nanoparticles for Packaging Applications

“…Among nanoparticles, ZnO NPs are a popular choice for a variety of applications. ZnO NPs can be used for UV barrier properties, antifungal and antimicrobial activities, photovoltaic testing, beauty products, packaging materials, biomaterials, self-cleaning, water and air cleaning, sterilizing surroundings, and photocatalysts due to their unique physical and chemical properties, such as high electrochemical coupling coefficient, more chemical stability, a diverse range of absorbing radiation, huge excitonic binding energy (60 meV), and large energy bandgap [24,25]. ZnO NPs have several outstanding properties, including ease of synthesis, controllable form and size, excellent biocompatibility, and their intrinsic ability to emit a wide range of colors (violet, blue, green, yellow, and red) [26][27][28].…”

Sustainable and Eco-Friendly Packaging Films Based on Poly (Vinyl Alcohol) and Glass Flakes

“…The quality of packaging films decides the shelf life of the encapsulated food [ 7 , 8 ]. A variety of biodegradable polymers are used in the food packaging industry, which include polylactic acid (PLA), polyimide (PI) [ 9 , 10 ], and natural polymers such as gelatin [ 11 , 12 ] and fruit extracts [ 13 , 14 , 15 ]. Most of these polymers have good film formability but possess poor barrier characteristics against the diffusion of moisture and oxygen.…”

Luminescent Coatings Based on (3-Aminopropyl)triethoxysilane and Europium Complex β-Diketophosphazene

“…Hydrophobicity helps to reduce the water permeation rate of the product. Exposure to temperature occurs during the manufacture and operation of the device [35]. Due to the luminescent properties of the polymer, it can be used both in light sources and as a detector.…”