Study on the interfacial evaporation of aqueous solution of SDS surfactant self-assembly monolayer

Researches in chemical, biological and medical engineering consider that the self-assembly monolayer formed by SDS surfactants being to retard interfacial evaporation of aqueous solution. In heat transfer, the application of SDS surfactant in water is considered to enhance the boiling heat transfer. However, to our knowledge, the mechanism of interfacial evaporation in boiling heat transfer with the application of SDS surfactants has still not been clarified. The authors tried to give a new insight into this mechanism of the interfacial evaporation through the self-assembly monolayer of SDS surfactants by developing a model, which indicates that the accessible area and the hydrophobic interaction retard interfacial evaporation, while the decrease in the incipient temperature of phase change by SDS surfactants promotes interfacial evaporation. Thus, the effect of SDS surfactants in aqueous solution on interfacial evaporation is dual: as the concentration of SDS surfactant additives is lower than an optimal value and the interfacial superheat is not extremely high, the application of SDS surfactant promotes the interfacial evaporation; otherwise, retards the interfacial evaporation.