模拟液的极性对聚丙烯中抗氧化剂迁移的影响  

Effect of the polarity of simulated liquid on migration of antioxidants in polypropylene

作　　者：刘悦悦 张钦发[1] 菅田田 莫宜澄 LIU Yue-yue;ZHANG Qin-fa;JIAN Tian-tian;MO Yi-cheng(College of Food Science,South China Agricultural University,Guangzhou,Guangdang 510642,China)

机构地区：[1]华南农业大学食品学院,广东广州510642

出　　处：《食品与机械》2019年第2期62-65,76,共5页Food and Machinery

摘　　要：研究了4种抗氧化剂BHA、BHT、Irganox1076、Irgafos168从聚丙烯塑料迁移至6种不同极性的模拟液时,模拟液极性对抗氧化剂迁移规律的影响。结果表明,抗氧化剂与聚丙烯塑料相溶性越差,与模拟液相溶性越好,迁移平衡分配系数越大;同时,模拟液极性越接近聚丙烯时,迁移扩散系数越高,扩散系数受分子量影响越小,反之,则迁移扩散系数受分子量影响较大,扩散系数随分子量的增大而减小;无水乙醇模拟液中,抗氧化剂分子量越大,平衡分配系数受温度影响越大,迁移焓变随分子量增大而增大,而正己烷模拟液中变化正好与之相反。The effects of the polarities of the simulated liquids were investigated on the migration of four antioxidants BHA,BHT,Irganox1076,and Irgafos168 migrated from polypropylene plastics to six different polar simulating solutions.Results,the solubility of antioxidant with polypropylene plastics was worse,the intermiscibility of antioxidant with simulated liquid was better,and the migration equilibrium distribution coefficient was higher.Beyond that,the closer the simulated liquid polarity was to polypropylene,the higher the migration diffusion coefficient was,and the smaller influence of molecular weight on the migration diffusion coefficient of antioxidants was.Conversely,the migration diffusion coefficient would be greatly affected by the molecular weight,and the diffusion coefficient decreased with the increase of the molecular weight.When anhydrous alcohol was used as food simulated liquid,the larger the molecular weight of the antioxidant was,the greater the equilibrium partition coefficient was affected by temperature,and the migration enthalpy increases with the increase of the molecular weight,while the change in n-hexane used as food simulated liquid was exactly the opposite.

关 键 词：抗氧化剂 模拟液极性 迁移规律 

分 类 号：TS206.4[轻工技术与工程—食品科学] TQ325.14[轻工技术与工程—食品科学与工程]