Abstract

Abstract We investigated the surface tension behavior and gelation ability of amide amine oxide surfactants with different numbers and arrangements of amide groups, and different spacer lengths between the amide and amine oxide groups. Whether the amide groups work as the polar head groups or they are incorporated in the hydrophobic part depended on the spacer length. The number and arrangement of amide groups were important in the hydrogen-bond formation between surfactant molecules.

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