- Method of preparing composite films having polydopamine treated graphene oxide-polyvinylalcohol and humidity sensing method using the same

摘要

The present invention relates to a process for preparing graphene oxide by adding an organic solvent and an oxidizing agent to graphene, Adding distilled water to the prepared graphene oxide to prepare a graphene oxide suspension; Mixing a dopamine source with the graphene oxide suspension to produce a polydopamine treated graphene oxide; Dissolving polyvinyl alcohol in distilled water and mixing the polypodophenated graphene oxide with a solution to prepare a mixed solution; And a step of applying the mixed solution and drying to form a film. The method for producing a polypodamine-treated graphene oxide-polyvinyl alcohol composite film and the method for producing a polypopamine-treated graphene oxide-polyvinyl alcohol composite film Provides a humidity measurement method. Since graphene oxide treated with polydodamine acts as a moisture barrier to allow PVA to dissolve in water, a polydopamine-treated graphene oxide-polyvinyl alcohol composite film can be utilized as a highly effective humidity sensor.