二氧化硅在菜籽油吸附脱磷中的应用及其对酚酸的影响

为了精炼后的油中尽可能多地保留菜籽多酚，首先通过傅里叶红外光谱分析（Fourier infrared spectrum，FT-IR）和差示扫描量热分析（differential scanning calorimetry，DSC）对二氧化硅（SiO2）和磷脂酰乙醇胺（PE）以及它们的复合物进行表征分析，然后以菜籽油为研究对象，分析了它在SiO2吸附脱磷处理中酚酸的变化规律，同时考察了吸附脱磷效果，并通过正交优化实验获得了高脱磷率和高酚酸保留率的工艺参数条件。研究结果表明，SiO2与PE的复合可能是一种弱的相互作用；SiO2对菜籽油中的磷脂有较好的吸附脱除作用，在脱磷温度为35oC、SiO2添加量为0.75%、脱磷时间为15 min的条件下，脱磷率可达86.7%，同时菜籽油中的总酚和Canolol（2,6-二甲氧基-4-乙烯基苯酚）保留率分别高达99.5%和98.7%。

Application of silica in rapeseed oil adsorption dephosphorization and its effect on phenolic acid

In order to fully retain rapeseed polyphenols in refined oil, silica (SiO2), phosphatidyl ethanolamine(PE) and their complex were characterized by Fourier infrared spectrum (FT-IR) and differential scanning calorimetry (DSC). With rapeseed oil as research object, the change of phenolic acids and effect of adsorption dephosphorization during dephosphorization process were investigated. The best technological parameters were obtained by orthogonal optimization experiment. Results showed that combination of SiO2 and PE might have weak interaction. SiO2 had excellent adsorption and removal effect on phospholipids in rapeseed oil. Under dephosphorization temperature of 35oC, SiO2 amount of 0.75%, and dephosphorization time of 15 min, dephosphorization rate was 86.7%. Meanwhile, retention rate of total phenol and Canolol in rapeseed oil were 99.5% and 98.7% respectively.