中文摘要：

研究了恒表面氧压搅拌式有氧补偿条件下乳状液中多不饱和脂肪酸（PUFA）的氧化。通过综合考虑气液边界传质阻力、油水边界乳化剂形成的液膜边界层阻力、PUFA自催化氧化反应动力学，建立了相应的扩散-氧化数学模型。实验验证该模型能较好地拟合搅拌式有氧补偿条件下乳状液中氧的扩散和亚油酸的氧化过程，并在乳化剂浓度变化对乳状液中PUFA氧化的影响方面表现出很好的适用性。研究对揭示乳状液中PUFA的氧化机制最终有效控制PUFA的氧化具有重要的理论研究价值。

英文摘要：

The oxidation of PUFA （ poly-unsaturated fatty acid） in emulsion with constant surface oxygen pressure and agitating oxygen compensation was studied. By considering the mass transfer resistance of gas-liquid boundary, the resistance of boundary layer from emulsifier membrane and the autocatalytic-type autoxidation reaction of PUFA compositely, a mathematical model of diffusion-oxidation was established. The model was verified by comparing the predictions of the model to the experimental data. The results show that the model can be consistent well with the oxygen diffusion and linoleic acid oxidation in emulsion, and model applicability is fine on the effect of emulsifier concentration on the oxidation of PUFA in emulsion. The results seem valuable to explain the mechanism of PUFA oxidation and control its oxidation in emulsion.