余立,林渊智,王永祥.果蔬微孔包装膜开孔模型的建立与验证[J].包装工程,2023,44(23):111-117.
YU Li,LIN Yuan-zhi,WANG Yong-xiang.Establishment and Validation of Perforation Model for Fruit and Vegetable Microporous Packaging Film[J].Packaging Engineering,2023,44(23):111-117. |
| 果蔬微孔包装膜开孔模型的建立与验证 |
| Establishment and Validation of Perforation Model for Fruit and Vegetable Microporous Packaging Film |
| 投稿时间：2023-02-23 |
| DOI：10.19554/j.cnki.1001-3563.2023.23.013 |
| 中文关键词: 开孔模型 微孔膜 薄膜透气机理 |
| 英文关键词: perforation models microporous films air permeability mechanism of film |
| 基金项目:2021年度福建省中青年教师教育科研项目(科技类)(JAT210374);食品软塑包装技术福建省高校工程研究中心2021年度开放基金项目(G1—KF2109);横向课题(HX2022079，HX2022080，HX2022078) |
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| 中文摘要: |
| 目的 建立一种能够有效控制果蔬气调包装袋内气体浓度的微孔膜开孔模型，以便有效延长果蔬保质期。方法 通过分析气体在薄膜微孔中的透气机理，并结合原膜透气机理和果蔬自身呼吸速率，建立薄膜开孔模型。以樱桃为包装对象，通过对比包装容器内实测气体浓度与预测气体浓度，判别开孔模型的准确性。结果 开孔模型3-1设计的包装方案，其内部实测氧气浓度与预测氧气浓度最吻合;模型1-1与模型1-2计算的开孔方案其孔径达到毫米级，开孔数量达到100，不适合用于薄膜开孔。模型3-2、模型2-1和模型2-2设计的包装方案，其内部实测气体浓度与预测气体浓度不一致。结论 微孔直径大小会直接影响气体分子在微孔中的扩散形式和开孔模型的准确性。当微孔直径在100 µm时，利用Fick定律和Kundsen定律的扩散系数Dk构建的数学模型能够准确地控制包装袋内的O2浓度与CO2浓度，依据该模型制作的微孔气调包装袋能够有效延长樱桃的保质期。 |
| 英文摘要: |
| The work aims to develop a perforation model of microporous packaging films for fruits and vegetables, so that the gas concentration inside the bags could be accurately controlled to extend the shelf life of fruits and vegetables. By analyzing the gas permeability mechanism in the microporous films, and combining the original film permeability mechanism and the fruit and vegetable's own respiration rate, a perforation model of packaging films was established. And with cherries as the packaging object, the accuracy of the perforation model was judged by comparing the measured gas concentration in the packaging container with the predicted gas concentration. The internal measured oxygen concentration of the packaging scheme designed according to opening model 3-1 best matched the predicted oxygen concentration. For the package scheme designed according to model 1-1 and model 1-2, the hole diameter was as small as millimeter and the number of holes was as more as 100, it was not suitable for film perforation. The internal measured gas concentration of the packaging scheme designed according to model 3-2, model 2-1 and model 2-2 was not consistent with the predicted gas concentration. It is proved that the diameter of the microporous pores directly affects the diffusion pattern of gas molecules in the microporous pores and the accuracy of the perforation model. When the micropore diameter is 100 µm, the mathematical model constructed using Fick's law and the diffusion coefficient Dk can accurately control the O2 concentration and CO2 concentration inside the bag. Microporous air-conditioned packaging bags based on this model can effectively extend the shelf life of cherries. |
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