ZHU Junyue, DUAN Yuanyuan, WANG Xiaodong, et al. Review of super-spreading of fluids on solid substrates[J]. CIESC Journal, 2014, (3): 765-776.DOI: 10.3969/j.issn.0438-1157.2014.03.001.
The research progress of super-spreading of fluids on solid substrate is reviewed. The super-spreading systems are summarized
and the influence factors
inner mechanism
experimental correlation model and numerical simulation method are also presented. Several trisiloxane or ethoxylated surfactants and a few ionic surfactant solutions have super-spreading phenomenon on corresponding solid substrates
and surfactant concentration and solid surface energy have crucial influence on super-spreading. The Marangoni effect arising from the concentration difference along the vapor liquid interface is recognized as the key mechanism controlling super-spreading. And the surfactant transportation and adsorption on vapor-liquid
solid-liquid and solid-vapor interfaces have great influence on the Marangoni effect. The research fields for the future are also analyzed. With respect to experimental investigation
the experimental systems should be extended and the criteria for super-spreading should be established. The macroscopic influence factors should be taken into full account. With respect to theoretical investigation
the Marangoni effect as well as the interfacial properties alteration based on surfactant transportation and adsorption need to be fully considered
a full scale theoretical model could be established based on the theoretical achievement in Newtonian fluid. With respect to numerical simulation
accurate transportation and adsorption model should be established from molecular dynamics simulation and then introduced into the hydrodynamic model to make a precise super-spreading simulation. A possible schematic diagram of the whole spreading process on hydrophobic substrate of super-spreaders is also proposed.