乙氧基化脂肪酸甲酯的性能及丙氧基化改性研究  

Performances of ethoxylated fatty-acid methyl esters and chemical modification with propylene oxide

作　　者：陈健 方云 杨澄宇 阮小云 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214036

出　　处：《日用化学工业》2004年第2期80-83,共4页China Surfactant Detergent & Cosmetics

基　　金：教育部科学技术研究重点资助项目(JJS2002-78);江苏省高校高新技术产业发展资助项目(SJF2001-31)

摘　　要：以单碳酸或混合酸甲酯为原料,通过一步法乙氧基化反应合成了不同链长的脂肪酸和不同EO数的乙氧基化脂肪酸甲酯(EFME),测定了EFME的物化性能和应用性能。结果表明,EFME具有低成本、低泡等特殊优点,性能依赖EO加成数变化连续可调整,EFME中的封端甲基是导致其性能不同于AEO的最重要的结构因素。用PO对EFME进行化学改性,先加成PO的产品的起泡力更低、流变性更好,与不改性产品相比起泡力降为原先的29%;稳泡性降为原先的22%;黏度降低为原先的44%。说明PO位于分子的亲水端侧较处于疏水端侧对产品的泡沫性和流变性的影响程度更大,通过PO改性可以进一步开发EFME的新用途。Ethoxylated fatty-acid methyl esters(EFME)with different hydrophobic chains and different EO numbers were synthesized from isolated or mixed fatty-acid methyl esters by direct ethoxylation in the presence of a special catalyst.Their physical-chemical and application properties were investigated in detail.The experiment results show that EFME has special advantages such as lower cost and lower foaming property white the performance of EFME can continuously change depending on the number of EO adducted.The capped methyl group in the hydrophilic end of EFME is the most important factor that resulted in performance as campared with AEO.EFME chemically modified by blocking PO between the capped methyl group and EO chain displays lower foam stability and better rheological properties.The foaming ability is 71 % lower,the stability of foam is 78 % lower and the viscosity is 56 % lower than that of the original,which reveals that the new applications of EFME can be developed by PO blocking.

关 键 词：乙氧基化脂肪酸甲酯 丙氧基化改性 单碳酸 混合酸甲酯 乙氧基化反应 非离子表面活性剂 

分 类 号：TQ423[化学工程]