李佳媛,黄奕娜,张钦发,杨婷.抗氧化剂从聚丙烯向食品模拟液中迁移的深层影响因素研究[J].包装工程,2018,39(13):78-84.
LI Jia-yuan,HUANG Yi-na,ZHANG Qin-fa,YANG Ting.Underlying Influencing Factors of Migration of Antioxidants from Polypropylene Plastics to Food-simulating Solvents[J].Packaging Engineering,2018,39(13):78-84. |
| 抗氧化剂从聚丙烯向食品模拟液中迁移的深层影响因素研究 |
| Underlying Influencing Factors of Migration of Antioxidants from Polypropylene Plastics to Food-simulating Solvents |
| 投稿时间：2017-08-10 修订日期：2018-07-10 |
| DOI：10.19554/j.cnki.1001-3563.2018.13.014 |
| 中文关键词: 抗氧化剂 迁移 聚丙烯 溶解度参数 Scatchard-Hilderbrand热力学 |
| 英文关键词: antioxidants migration polypropylene (PP) solubility parameter Scatchard-Hilderbrand thermodynamic |
| 基金项目:广东省质量技术监督局计划（2016ZZ05） |
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| 中文摘要: |
| 目的 研究影响有害物质向食品中迁移的因素，以有效预测包装材料对食品的污染风险。方法 研究温度、模拟液的溶解度参数和抗氧化剂的相对分子质量分别对抗氧化剂BHA，BHT，1076和168从聚丙烯向乙醇模拟液中迁移焓变、分配系数和扩散系数的影响，并把Scatchard-Hilderbrand热力学理论模型预测的平衡分配系数（Dr0）与实验值（Dr）进行比较分析。结果 4种抗氧化剂从PP向无水乙醇中迁移的平衡分配系数对数（ln Dr）、扩散系数对数（ln Df）与温度倒数（1/T）成直线关系，符合吉布斯-亥姆霍兹方程和阿累尼乌斯方程，迁移为吸热反应，焓变随抗氧化剂相对分子质量的增大而减小，扩散系数随着相对分子质量和模拟液溶解度参数的减小而增大。同时，抗氧化剂从聚丙烯中迁移到不同溶解度参数模拟液中的平衡分配系数（模拟液质量浓度/塑料质量浓度）实验值,与Scatchard-Hilderbrand热力学理论模型计算值随模拟液溶解度参数的变化趋势基本一致。结论 模拟液与PP的溶解度参数越接近，抗氧化剂初始迁移扩散系数越大，抗氧化剂相对分子质量对迁移扩散系数的影响越小，4种抗氧化剂从PP中迁移平衡分配系数变化符合Scatchard-Hilderbrand热力学理论模型。 |
| 英文摘要: |
| The work aims to study the factors that affect migration regulation of harmful compounds in food, so as to effectively predict the risk of pollution of packaging material on food. The effect of temperature, solubility parameter of food-simulating solvents and molecular weight of antioxidants on enthalpy change, migration partition coefficient value (Dr0) and diffusion coefficient value of BHA, BHT, 1076 and 168 from polypropylene plastics into food-simulating solvents (ethyl alcohol) was studied. The migration partition coefficient value (Dr0) was predicted with Scatchard- Hilderbrand thermodynamic theoretical model and was contrasted with experiment value (Dr). The logarithms of migration partition coefficient value (ln Dr) and migration diffusion coefficient value (ln Df) of 4 kinds of antioxidants from PP into ethyl alcohol absolute exhibited a linear relationship with eciprocal of temperature (1/T) and followed Gibbs-helmholtz equation and Arrhenius equation, respectively. Migration was an endothermic reaction. The enthalpy change decreased with the increase of molecular weight of antioxidants, and migration diffusion coefficient value in-creased as molecular weight of antioxidants and solubility parameter of food-simulating solvents decreased; meanwhile, migration partition coefficient (food-simulating solvents mass concentration/plastics mass concentration) experiment value of the antioxidant from polypropylene into the food-simulating solvents with various solubility parameters was basically consistent with Scatchard-Hilderbrand thermodynamic calculating value in variation trend of solubility parameter of food-simulating solvents. The less the solubility parameter difference value between stimulants and PP is, the larger diffusion coefficient value is, and the smaller influence of molecular weight of antioxidants on diffusion coefficient value is. The variation on migration partition coefficient of 4 kinds of antioxidants from PP into various food-simulating solvents accords with Scatchard-Hilderbrand thermodynamic theoretical model. |
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