PROCESS FOR PRODUCTION OF SUBMICROHONEYCOMB STRUCTURES

摘要

A process for the production of a honeycomb-like porous body of 10 to 1000nm in thickness which is made of a water-insoluble polymer and has pores having diameters of 10 to 100nm, which comprises the following steps: (1) the step of dissolving a water-insoluble polymer in a water-incompatible organic solvent having a surface tension (³L) of 50 dyne/cm or below to prepare a solution of the polymer in the organic solvent, (2) the step of applying the solution prepared in the step (1) to the surface of a substrate with the proviso that the surface tension (³S) of the substrate, the surface tension (³L) of the organic solvent, and the surface tension (³SL) between the substrate and the solvent satisfy the relationship: ³S - ³ SL > ³L, and (3) the step of bringing the solution applied on the substrate into contact with air having a relative humidity of 30 % or above to evaporate the organic solvent at such a rate that the coating thickness at applying the solution to the surface of the substrate is reduced to one-fifth within one second.