纸塑复合包装材料纸中化学物迁移预测模型  

Migration model of chemical substances from paper and paperboard through plastic coating layer

作　　者：黄秀玲[1] 王志伟[1] 胡长鹰[2] 朱勇[3] 

机构地区：[1]江南大学包装工程系,江苏无锡214122 [2]暨南大学食品工程系,广东广州510632 [3]暨南大学包装工程研究所,广东珠海519070

出　　处：《化工学报》2008年第6期1578-1583,共6页CIESC Journal

基　　金：广东省自然科学基金项目(07005952);北京市重点实验室开发研究课题基金项目(KF060402);珠海市科技计划项目(PB20051013);暨南大学引进人才基金项目~~

摘　　要：基于一维Fick扩散理论,考虑了纸和塑料涂层界面处的分配系数及纸和塑料涂层中不同的扩散系数,建立了迁移预测模型,得到了其解析解。分析了各参数如分配系数、扩散系数、纸中化学污染物初始浓度和量纲1时间对迁移行为的影响。结果表明,随纸塑界面处分配系数kCP的增大,从纸中迁移入功能阻隔层塑料中的化学污染物量和通过功能阻隔层塑料迁移进入食品中的化学污染物量明显增多;塑料中扩散系数DC的变化显著影响了塑料和食品中化学污染物的量,而纸中扩散系数DP的改变对迁移的影响不显著。Migration of chemical substances from paper and paperboard through plastic coating layer into foods contaminates foods and endangers people’s health.It is important to carry out theoretical and experimental researches on the migration of chemical substances.Analytical solutions were obtained based on one-dimension Fick diffusion theory by taking into account partition coefficient between paper and plastic （kCP） and different diffusion coefficients of paper and plastic （DP and DC）.The influences of various parameters, such as partition coefficient, diffusion coefficient, initial concentration of migrants in paper, dimensionless time, on migration behavior were analyzed.The results showed that the partition coefficient was critical to the migration of chemical substances in the functional barrier and foods.Diffusion coefficient of plastic DC had great influence on the amount of migrants in plastic and foods.On the contrary, the influence of diffusion coefficient DP on migration was not evident.The concentration of migrants in plastic and the amount of migrants in foods increased with increasing initial concentration in paper or paperboard.Migration time reflected the migration trends of chemical substances in materials and foods.

关 键 词：迁移 模型 扩散系数 分配系数 纸塑包装 食品包装安全 

分 类 号：O552.2[理学—热学与物质分子运动论] TS206.4[理学—物理]