Abstract: To synthesize gemini macromolecule modified phospholipids，oleoyl chloride was chosen as acylating agent，polyethylene glycol-800 as hydroxylation agent. The optimal condition for synthesis was determined by single-factor test and orthogonal-factor test. The main step’s optimal condition was at 339 K，6 h，the mass ratio of glacial acetic acid∶ion exchange resin∶hydrogen peroxide∶n-oleoyl phospholipid of 5.2∶8∶61.4. The results showed that the product's emulsified properties and dispersion were better than single modified phospholipids，and it turned out the product was macromolecule whose molecular weight is 2172, also it has better value of HLB(11.38).

Key words: soybeanlecithin, modification, gemini structure, properties, soybeanlecithin, modification, gemini structure, properties

摘要： 以油酰氯为酰化剂、聚乙二醇为羟化试剂对大豆磷脂进行改性，通过单因素和正交实验确定最佳工艺，主要工艺条件为：反应温度66 ℃，冰乙酸用量5.2%，催化剂离子交换树脂的含量8%，双氧水用量61.4%，反应时间6 h。测定结果为：新型双子结构大分子改性磷脂分子量2172 g/mol，乳化力和分散力优于单一改性磷脂，HLB值为11.38好于单一改性磷脂。

关键词: 大豆磷脂, 改性, 双子结构, 性能, 大豆磷脂, 改性, 双子结构, 性能