Patent ID: 7175914

Claim:
A base material element comprising: a base material member; and a polyaniline film on a surface of the base material member, wherein: the polyaniline film is made of polyaniline and/or a derivative thereof; the polyaniline film is imparted with at least one hydrophilic functional group selected from the group consisting of a primary amino group, a secondary amino group, a tertiary amino group, an ammonium group, a nitric acid group, a carboxyl group, a sulfonic acid group, a phosphonic acid group and a hydroxyl group; the base material member has a temperature lower than atmospheric temperature so that moisture in atmospheric air that contacts the base material member is operably condensed to water on the polyaniline film; the base material member is capable of cooling the atmospheric temperature; the polyaniline film is disposed outside of the base material member so that the polyaniline film directly contacts the atmospheric air and the water; the hydrophilic functional group in the polyaniline film is imparted on a surface of the polyaniline film for expanding the water to be a water film on the polyaniline film; the polyaniline film facilitates a generation of active oxygen having deodorization and sterilization functions by the condensed water; wherein the polyaniline film has been heat treated at 140–300° C. for 15–60 minutes.