Synthesis and Surface Active Properties of 1,1,1,1-Tetra-(2-oxypropyl Sulfonate-3-alkylether-propoxy)neopentanes

摘要

Tetrameric sulfonate surfactants 1,1,1,1 -tetra-(2-oxypropyl sulfonate-3-alkylether-propoxy)neopentanes were prepared with raw materials containing epichlorohy-drin, pentaerythritol, long-chain alcohols, 1,3-propane sul-tone and sodium hydroxide by esterification, a ring opening reaction, and a sulfonation reaction. The chemical structures of the prepared compounds were confirmed by FTIR, 1H-NMR and element analysis. With the increasing length of the carbon chain, the values of their CMC initially decreased. The longer the alkyl chain, the higher the melting point. The Krafft point of all these tetrameric sulfonate surfactants was below 0 °C.and they had excellent water solubility. These compounds were superior in surface active properties to general sulfonate surfactants SDS. The efficiency of adsorption at the water/air interface (pC_(20)) of these surfactants was very high. Their foaming properties, their wetting ability of a felt chip, and their lime-soap dispersing ability was investigated.