Aspartic acid and Iysine can promote SDS micellization.The critical micellar concentration of SDS decreases with amino acid concentration,but first does and then increases with temperature.In SDS micellization,the change of standard Gibbs free energy is negative in SDS/H2O system with or without amino acid.With the increase of amino acid concentration,the changes of mole standard Gibbs free energy and enthalpy decrease,but the change of the system's entropy increases.The effect of lysine is more than that of aspartic acid on the thermodynamic functions.
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