Patent ID: 8323750

Claim:
A method for modifying surfaces of polymer materials, the method comprising the steps of: introducing functional group L onto the surface of a polymer material P by a photochemical reaction of a photosensitive group X under UV irradiation, wherein the photosensitive group X comprises at least one xanthone unit; wherein a molecule X-L and/or a molecule X-S-L are introduced onto the surface of the polymer material P, wherein X represents a photosensitive group comprising at least one xanthone unit, L represents a functional group, and S represents a linker; wherein the linker S is selected from: substituted or unsubstituted and/or functional group interrupted C 1-20 hydrocarbyl groups, polyethylene glycol, oligo/poly-amides, oligosaccharides, oligo/poly-phosphate esters or phosphate salts, oligo/poly-sulfamides/sulphonic acid esters, and a combination of above-mentioned units; wherein the photosensitive group X is originated from substituted mono-xanthone as shown in formula I: wherein R independently represents a substituents on the corresponding ring, a and b are independently selected from integers of 0-3, and a+b≧1; wherein the substituent R is selected from a thermosensitive functional group, an acyclic hydrocarbyl group that is substituted or unsubstituted and/or interrupted by a functional group, a substituted or unsubstituted independent ring structure relative to the mono-xanthone units, or a substituted or unsubstituted fused ring formed together with the ring atoms of the mono-xanthone units.