改性大气
多孔性
选择性
化学工程
材料科学
大气(单位)
多孔介质
化学
复合材料
有机化学
食品科学
保质期
工程类
物理
热力学
催化作用
作者
Jian Yang,Zhilong Zhou,Peng Lü,Min Wu
标识
DOI:10.1016/j.cej.2023.142660
摘要
The preservation of fresh fruit and vegetables is always a challenge. Equilibrium modified atmosphere packaging (EMAP) is ideal for preserving fresh produce. The gas transmission and selectivity of EMAP films is crucial for achieving atmospheric equilibrium in packaging. Inspired by leaf porous structure regulating their gas exchange function, we selected natural porous diatomite as the gas channel and modified it with polyethyleneimine (PEI). By introducing diatomite into the film matrix of CNFs, the gas transmission and CO2/O2 selectivity of EMAP films were regulated. The atmosphere in all the packages of EMAP films reached equilibrium within 24 h, which kept the fruit in low intensity aerobic respiration. The EMAP film of DgP7.5 (O2 transmission rate 43.33 cc m−2 day−1 bar−1, CO2/O2 selectivity 1.56) was found to be the most suitable for packaging litchis and green plums. Diatomite with porous structures will provide a design concept for EMAP films.
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