Ligand Graft Functionalized Substrates

An article comprising a porous base substrate having interstitial and outer surfaces;

• and grafted ligand groups extending from the surfaces of the porous base substrate, wherein the grafted ligand groups comprise the reaction product of a grafted electrophilic functional group and a ligand compound:
• wherein
• each R4 is individually H, alkyl or aryl,
• each R6 is individually alkylene or arylene,
• c may be zero or an integer from 1 to 500, and
• d is zero or 1, with the proviso that when d is zero, then c is 1 to 500.

A method of preparing a ligand functional substrate comprising:

• 1) providing a thermoplastic polymer substrate;
• 2) grafting a functional group to the surface of the substrate to produce a substrate having a grafted electrophilic functional groups extending from the surface(s) thereof;
• and
• 3) reacting the grafted electrophilic functional groups with biguanide ligand groups to produce a substrate having grafted biguanide ligand groups extending from the surface(s) of the substrate.