石墨烯/低密度聚乙烯复合包装膜中2种抗氧化剂向食品模拟物异辛烷的迁移

摘要

A high performance liquid chromatography (HPLC) method was established for detecting two antioxidants (Irganox1076 and Irgafos168) in graphene/low density polyethylene (LDPE) composite food packaging films.The effect of time,temperature and the presence of graphene and graphene nanoplatelets on the migration of the antioxidants from LDPE films to isooctane as a fatty food simulant was studied.The interactions of the two antioxidants with isooctane during migration were discussed.The experimental results showed that the migration rates of the antioxidants increased until reaching equilibrium with increasing time or temperature.The antioxidants synergistically affected the migration of each other.The presence of graphene and graphene nanoplatelets hindered the migration of the antioxidants due to their agglomeration and adsorption capacity.%建立高效液相色谱法检测石墨烯/低密度聚乙烯复合食品包装薄膜中2种抗氧化剂(Irganox1076、Irgafos 168)的方法.考察时间、温度以及石墨烯和石墨烯微片的存在对2种抗氧化剂向脂肪类食品模拟物异辛烷迁移的影响,同时分析2种不同抗氧化剂在迁移中的相互作用.结果表明,2种抗氧化剂的迁移会随着迁移温度的升高以及迁移时间的延长而增加直至达到迁移平衡;2种抗氧化剂之间存在协同作用,在迁移过程中会相互影响;石墨烯及石墨烯微片纳米粒子的团聚现象和吸附作用抑制了食品包装中的Irganox1076、Irgafos168两种抗氧化剂向异辛烷中的迁移.