水解稳定型硼酸酯表面活性剂的合成和表征

Synthesis and Characterization of Hard Hydrolytic Borate Ester Surfactant

硼酸和甘油在阳离子交换树脂做催化剂的条件下反应合成硼酸甘油酯,反应转化率可达97%,。根据用KOH的乙醇溶液滴定得到的酸值,计算得出最佳产物的转化率能达到96.82%,。然后将生成的硼甘酯用环氧乙烷(EO)改性得到含有4个以上碳链的EO硼酸甘油酯,其水解稳定时间增加到48,h,说明其水解稳定性得到了改善。用红外谱图表征改性前后产物的结构进一步证明了最终产物就是含有C—O—C键的EO硼酸甘油酯。

Boric acid and glycerol were adopted as starting materials to react with cation exchange resin(CER)as the catalyst.The conversion of the products was characterized by acid value,titrated by potassium hydroxide(KOH)ethanol solution.It showed that the yield of optimum products reached about 96.82%,.Then they were modified with EO,gaining more than four carbon chains,and the hydrolytic time was prolonged to 48,h.The structures of both unmodified and modified products were further confirmed by IR.The results indicated that hard hydrolytic borate ester surfactants with C—O—C bond were synthesized.