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김석조,권세진,강주희,송호준,이상국 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Polyvinyl alcohol(PVA) has been used as a barrier coating material due to their high oxygen barrier property. However, PVA coated film has a poor water vapor barrier level, for reasons of the high solubility of PVA in water. To decrease the water vapor transmission rate (WVTR), the barrier layer was prepared to reduce the water affinity by interaction between PVA and POSS. The POSS has been in Organic-inorganic hybrid nanocomposite materials. Organic-inorganic hybrid nanocomposite materials have been regarded as a new generation of high performance materials since they combine the advantages of inorganic materials (rigidity, high stability) and those of organic polymers (flexibility, dielectric property, ductility, and processability). In this work, we prepared films consist of PVA-MMT/Methyl Methacryl Polyhedral Oligomeric Silsesquioxane (MAP_POSS) by using bar-coater.
The effect of polysilazane coating on nanocomposite films as gas barrier film
김석조,석웅철,권세진,강주희,송호준,이상국 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
The nanocomposite film is composed Polyvinylalcohol(PVA)-Montmorillonite(MMT). PVA/MMT nanocomposite film is usually used to food packaging industry because of high transparency, barrier property, excellent flexibility. However, PVA nanocomposite film is poor gas barrier property. Because PVA has many hydroxyl groups that means very hydrophilic. To solve this problem, polysilazane is coating on nanocomposite film. After UV treated nanocomposite film has hydrophobic surface that doesn`t dissolve water vapor at film surface. The barrier property were investigated by Oxygen Transmission Rate (OTR), Water Vapor transmission Rate (WVTR), Water Contact angle, Hazemeter, UV-Vis, FT-IR, Differential Scanning Calorimetry (DSC).
The addition of PVA/POSS nanocomposite with improved gas barrier property
김석조,석웅철,권세진,강주희,송호준,이상국 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
These days food packaging industry is used for polymer/inorganic nanocomposite materials (e.g. PVA/MMT). Nanocomposite materials have many advantages that transparency, barrier property, flexibility. The important factor of barrier property is to prolong food stability and storage period. The POSS was added to the nanocomposite in order to enhance the barrier property. In this work, we have tried to improved of barrier property by using POSS of different structure (amine, vinyl, urethane). The barrier property were investigated by Oxygen Transmission Rate(OTR), Water Vapor Transmission Rate(WVTR), Water Contact angle, Hazemeter, UV-Vis, FT-IR, Differential Scanning Calorimetry (DSC).