The present invention relates to a substrate in which at least a part of the surface is modified with an amino unsaturated heterocyclic compound or a tautomer thereof, an oligomer or (co)polymer thereof, and a method for modifying the surface thereof, and more particularly, an amino unsaturated having at least one amine group. A substrate modified with a heterocyclic compound or a tautomer thereof, an oligomer or a (co)polymer thereof is provided. The present invention also provides an aqueous solution of an amino unsaturated heterocyclic compound having one or more amine groups or a tautomer thereof, comprising the steps of contacting the aqueous solution with at least a portion of the surface of a substrate, washing and drying the substrate It provides a method for surface modification of a substrate, characterized in that.
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