聚乙烯醇缩醛膜阻气性能的研究
Study on gas-barrier properties of polyvinyl glutaral membranes
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摘要: 为了提高激光靶丸的阻气性能，用戊二醛对阻气层材料聚乙烯醇进行交联改性。在17份完全相同的10 mL质量分数3%的聚乙烯醇(PVA)和20 μL浓盐酸混合溶液中，分别加入从300 μL到1 700 μL的戊二醛(GA)，交联反应后，测量缩醛膜的阻气性能，并计算渗透系数。 结果表明，随着缩醛膜中戊二醛含量的增加，缩醛膜渗透系数的变化规律是：从减小到增加到不变再到增加；当戊二醛的含量是800 μL时，缩醛膜的渗透系数最小，阻气性能最好。Abstract: Gas-barrier material-polyvinyl alcohol (PVA) of multilayer laser microsphere was cross linked by glutaraldehyde (GA) in order to improve the gas-barrier properties of microsphere. Different content of GA, from 300 μL to 1 700 μL were added into the identical blended solutions of 10 mL, 3% PVA and 20 μL hydrochloric acid. Gas-barrier properties of polyvinyl glutaral (PVG) membranes was measured after cross linking reaction and permeability coefficient of PVG membranes was worked out. It was found that PVG′s permeability coefficient first decreases, and then increases, then keeps stead, at last increases with the increase of GA content in PVG membranes . Moreover, when GA content is 800 μL, the permeability coefficient of PVG film is the minimum with the best gas-barrier properties.
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