果蔬微孔膜气调包装模型与试验验证  

Theoretical model and experimental validation for modified atmosphere packaging of fruits and vegetables with micro perforated film

作　　者：李方[1] 卢立新[1,2] 

机构地区：[1]江南大学包装工程系,无锡214122 [2]中国包装总公司食品包装技术与安全重点实验室,无锡214122

出　　处：《农业工程学报》2010年第4期375-379,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"计划项目(2007AA100408);教育部科学技术研究重点项目(108066);江南大学创新团队发展计划资助课题

摘　　要：建立微孔膜气调包装的理论模型是保证气调包装质量、进行微孔膜气调包装系统设计的关键。基于孔径与分子平均自由程的关系,应用Fick扩散定理,结合果蔬呼吸速率模型,建立微孔膜果蔬气调包装内外气体交换的数学模型。以香菇为对象,利用密闭系统法确定其呼吸速率;采用硬质罐加PE膜封合包装香菇并在25℃、50%RH下储藏50h以上,测定不同初始气体组分、微孔孔数与孔径条件下包装内气体浓度变化,对香菇微孔膜气调包装模型进行试验验证。结果表明,模型预测值与试验数据吻合度较高,所建模型能较准确地预测香菇微孔膜气调包装内外气体交换过程。Modelling modified atmosphere packaging（MAP）with perforated film is one of key to design the MAP system of fruits and vegetables.Based on the relationship of the aperture and molecular mean free path,and combined with the respiration rate model of produce,a mathematical model based on Fick＇s law for predicting O2 and CO2 exchanges in MAP with micro perforated films was developed.The respiration rates of Lentinula edodes were estimated using the closed system method,and the respiration model for Lentinula edodes was established based on the Michaelis-Menten equation.Fresh Lentinula edodes were packed in plastic jars filled with air and modified atmosphere, which sealed by polyethylene films with different perforation number and perforation diameters.All samples were stored under 25℃ anda relative humidity of 50% for more than 50 hours,measuring the gas composition within packs during the storage.Comparison between model prediction and experimental data for gas composition within packs was conducted.Results indicated the model predictions agree well with the experimental data.

关 键 词：包装 模型 贮藏 气调包装 微孔膜 香菇 

分 类 号：S609.3[农业科学—园艺学]