Patent ID: 7799378
Filing Date: 2010-09-21
Classification: B01D,B29C,B29K,B29L

Abstract:
1. A process for preparing a micro-pillar structure, characterized in that a solution having a polymer dissolved in a hydrophobic organic solvent is cast on a substrate, said organic solvent is evaporated in a moist atmosphere of relative humidity of 50% or higher to condense moisture contained in an atmosphere prevailing on a surface of said cast solution into micro-droplets, said micro-droplets are dispersed on the surface of said cast solution or in said cast solution into a packed structure, said micro-droplets, condensed and dispersed on the surface of said cast solution or in said cast solution, are evaporated to obtain a porous honeycomb structure with said droplets used as casts, and said porous honeycomb structure is at least bisected by peeling in a thickness direction, thereby obtaining honeycomb structures wherein micro-pillars are regularly formed and arranged by said bisection on peeled sections, characterized in that said polymer is composed of a hydrophobic or biodegradable polymer and an amphipathic polymer and, optionally, a modifier is incorporated therein, and said hydrophobic polymer comprises a polymer having a polystyrene basic skeleton and said biodegradable polymer comprises a polymer having a poly(meth)acrylate basic skeleton.