Convectional, Sedimentation and Drying Dissipative Patterns of Colloidal Dispersions and Polymer solutions

Abstract

Convectional, sedimentation and drying dissipative structural patterns on a cover glass, a watch glass and others in the course of drying colloidal dispersions and polymer solutions have been reviewed. Cell convections and convectional flow of solvent and solutes from central area toward outside edges along the bottom substrates were observed. Primarily sedimentation patterns were macroscopic broad ring and vague microscopic structures. Sedimentary solutes moved in the balance between convectional flow and the sedimentation flow. Principal macroscopic drying patterns were broad rings and spoke-like ones. The microscopic drying fractal patterns such as star-like, needle-like, street road-like, blanch-like, string-like, cross-like, etc. were formed. The stratified structures formed from macro to micro scales. Importance of the shape and size of solutes on the dissipative patterns was clarified.