Methyl methacrylate-grafted phenolic resin fiber was soaked in AgNO3 a
queous solution to support Ag+ by ion exchange reaction. The fiber sup
porting Ag+ was carbonized at 900-degrees-C for 30 min in a nitrogen a
tmosphere, followed by activation at 900-degrees-C under a stream of s
team. One of the activated fibers contained 0.58 wt% of silver and sho
wed 2100 m2/g of Specific surface area and 200 MPa of tensile strength
. This fiber showed antibacterial activity against Staphylococcus aure
us and Escherichia coli before and after soaking in the flowing tap wa
ter for 20 days. The amount of Ag+ dissolved from the fiber into the w
ater is discussed from a viewpoint of practical use.