壳聚糖/聚乙烯醇改善纸基材料的水蒸气和氧气阻隔性能研究

Study on Using Chitosan/Polyvinyl Alcohol to Improve the Water Vapor and Oxygen Barrier Properties of Paper-based Materials

关键词:  壳聚糖  聚乙烯醇  分层涂布  共混涂布  水蒸气阻隔  氧气阻隔

Key Words:chitosan  polyvinyl alcohol  layering coating  blending coating  water vapor barrier  oxygen barrier

摘要:研究了壳聚糖和聚乙烯醇在改善纸基材料水蒸气（极性气体）和氧气（非极性气体）阻隔性能上的应用效果，探讨了壳聚糖/聚乙烯醇不同质量比和不同复合方式（共混和分层）对纸基材料水蒸气和氧气阻隔性能、机械性能和涂层稳定性的影响。结果表明，随着壳聚糖和聚乙烯醇质量比的降低，纸基材料的水蒸气阻隔性能逐渐增强，同时氧气阻隔性能逐渐降低；壳聚糖/聚乙烯醇分层涂布纸的水蒸气和氧气透过量均低于壳聚糖/聚乙烯醇共混涂布纸。当壳聚糖和聚乙烯醇的质量比为1∶1时，壳聚糖/聚乙烯醇分层涂布纸的水蒸气透过量和氧气透过量分别为9.36 g/(m²·d)和31.93 cm³/(m²·d)；与纯壳聚糖涂布纸相比，水蒸气透过量降低了约92%，与壳聚糖/聚乙烯醇共混涂布纸相比，水蒸气透过量降低了约68%，氧气透过量降低了约67%。

Abstract:In this paper， the application effect of chitosan and polyvinyl alcohol in improving the barrier properties of paper-based materials for water vapor （polar gas） and oxygen （non-polar gas） was studied. The effects of different mass ratios of chitosan/polyvinyl alcohol and different compounding methods （blending and layering） on the water vapor and oxygen barrier properties， mechanical properties and coating stability of paper-based materials were studied. The results showed that as the mass ratio of chitosan/polyvinyl alcohol decreased， the water vapor barrier properties of paper-based materials gradually increased， while the oxygen barrier properties gradually decreased. Compared with the chitosan/polyvinyl alcohol blending-coated paper， the chitosan/polyvinyl alcohol layering-coated paper had lower water vapor and oxygen transmission ratio. When the mass ratio of chitosan and polyvinyl alcohol was 1∶1， the water vapor and oxygen transmission rate of chitosan/polyvinyl alcohol layering-coated paper were 9.36 g/（m²·d） and 31.93 cm³/（m²·d）， respectively. Compared with the pure chitosan-coated paper， the water vapor transmission rate was reduced by about 92%. Compared with the chitosan/polyvinyl alcohol blending-coated paper， the water vapor and oxygen transmission rate were reduced by about 68% and 67%， respectively.