Abstract
In recent times, long chain amido sulfobetaine surfactants are a very attractive subject, but their unique self assembly properties as well as the rheological behavior of the mixture of these surfactants with other surfactant types are less documented. In this paper, the rheological behavior of the erucyl amido sulfobetaine (EASB) in mixture with long chain cationic surfactants was evaluated. The results indicated that in spent acid solution, the rheological responses of erucyl amido sulfobetaine (EASB) in the presence of cationic surfactants were improved. The effect of surfactants concentration and temperature were also studied.