Abstract: Epoxidized cottonseed oil was synthesized by reaction of organic acid acidified cottonseed oil with hydrogen peroxide using H3PO4 as catalyst in the emulsion system without solvent . The structure of synthesized epoxidized cottonseed oil was characterized by means of’ 1H NMR and FT-IR. Epoxy value，iodine value，acid value，and color of the product were determined by Chinese national standards. The effects of emulsiofier and organic acid，reaction time，temperature and proportion of reactants on the product properties were investigated. High quality epoxidized cottonseed oil plasticizer could be obtained by reaction of formic acid acidified cottonseed oil with hydrogen peroxide using MOA-3 as emulsifier without solvent. Epoxy value，iodine value (100g ) and acid value of the product could reach 6.12%、3.67g and 0.32 mg/g respectively. Epoxidized soybean oil was also successfully synthesized. The process avoids using organic solvent and decreases undesirable byproduct，and improves the quality of product.

摘要： 在乳化剂存在条件下，以磷酸为催化剂，过氧化氢与棉籽油反应合成了环氧棉籽油。通过核磁共振氢谱、红外光谱及黏度测定方法对产物的结构进行了表征，并采用国标法对产物的环氧值、碘值、酸值和色泽进行了测定。同时考察了乳化剂及有机酸种类、反应时间、反应温度及反应物配比对产物各项指标的影响。实验结果表明：无溶剂条件下，以脂肪醇聚氧乙烯醚（MOA-3）为乳化剂，用过氧化氢环氧化用甲酸酸化的棉籽油，可获得优质环氧棉籽油增塑剂。产物的环氧值为6.12%，碘值（100g）为3.67g，酸值为0.32 mg/g。此方法避免了使用有机溶剂，而且副产物生成量减少，提高了产品质量。