Wayne & Ken, LLC
pH-responsive amphoteric surfactant n-lauryl-(α-alkyl)-β-aminopropionic acid and preparation method and uses thereof
Disclosed are a pH-responsive amphoteric surfactant N-lauryl-(α-alkyl)-β-aminopropionic acid and a preparation method and uses thereof. An alkylamine and a solvent are added to a three-necked flask, stirred for complete dissolution, slowly dropwise added with methyl α-alkyl-acrylate and reacted at room temperature after the ice-water bath is removed. The reaction mixture is refluxed in water bath and evaporated under rotation to remove the solvent and the residual methyl α-alkyl-acrylate to give N-lauryl-(α-alkyl)-β-aminopropionic acid. Then N-lauryl-(α-alkyl)-β-aminopropionic acid and water are added to a three-necked flask, slowly dropwise added with a sodium hydroxide solution and reacted in water bath to give a crude product, which is filtered and dried to give a purified surfactant sodium N-lauryl-(α-alkyl)-β-aminopropionate. This surfactant is suitable for the foamed acid system and its performance can be switched by adjusting pH due to pH sensitivity.
Shaanxi University of Science & Technology
C C C C C
C07C C07C C09K C07C C07C
inventional inventional inventional inventional inventional
Lei Shaoyun Xingen Wei Yinyin Xianwen Zhiqiang Xiaojuan Xu
Wang Ma Feng Tian Zhang Li Dang Lai Yang