The present study focuses on the preparation of a uniform polyvinyl alcohol (PVA) coating solution using commercially available PVA and deionized water as primary raw materials,glycerin as a plasticizer,soluble starch as a reinforcing agent,and Tween 80 as an emulsifier. A series of polyvinyl alcohol (PVA) paper matrix composites were fabricated by applying varying concentrations of PVA onto the surface of standard A4 printing paper and adjusting the number of coating layers. The properties of the PVA paper matrix composite were characterized using scanning electron microscopy,a pressure difference gas permeation meter,and a computerized tensile testing machine. The analysis results revealed that the market model PVA-based paper matrix composite exhibited enhanced oxygen resistance. The preparation process of PVA paper-based composite was investigated and optimized. The results demonstrated that the optimal conditions for achieving superior oxygen resistance,with an oxygen permeability as low as 4.916 cm3/(m2·24h·0.1MPa),and exceptional tensile strength of 60.7 N,were obtained when utilizing a 9 wt％ concentration of PVA and applying four coating layers. Consequently,this ultra-high barrier material exhibits great potential for application in flexible packaging materials such as food,medicine,and electronic components.
关键词
聚乙烯醇/阻氧性/涂布层数
Key words
polyvinyl alcohol/oxygen barrier/quantity of coating layers
维普
万方数据