No abstract

Double-chain surfactants possessing two taurine units were synthesized by reaction of N-alkyltaurine (alkyl : octyl, decyl, or dodecyl) with ethylene glycol diglycidyl ether. All surfactants were soluble in water , and Krafft points were below 0•Ž. Cmc values were much less than those of the corresponding single-chain taurine type of compound. The isoelectric point of the title compound with two octyl chains was determined as about 5 .0. Water solubility was maintained constant at the pH around the isoelectric point. Changes in some surface active properties of the double-chain compounds due to those in the pH or the addition of electrolyte are discussed .