Surface modification of PET by acrylic acid and collagen

Poly( ethylene terephthalate)( PET) has good physical and chemical properties and,as an implantable biomaterial,it has bright application prospects. However,the poor absorbency and biological inertia of PET restrict its application in medical area. So it is necessary to improve the biocompatibility of PET by surface modification. This paper expounds the necessity of PET surface modification; then it reviews the current research status of surface modification of PET by acrylic acid both at home and abroad,along with the surface modification of high polymer by collagen for the purpose of improving the polymer's biocompatibility. Potential applications of modified PET are presented.