Modification of polycarbonateurethane surface with poly(ethylene glycol) monoacrylate and phosphorylcholine glyceraldehyde for anti-platelet adhesion

Abstract

Poly(ethylene glycol) monoacrylate (PEGMA) is grafted onto polycarbonateurethane (PCU) surface via ultraviolet initiated photopolymerization. The hydroxyl groups of poly(PEGMA) on the surface react with one NCO group of isophorone diisocyanate (IPDI) and another NCO group of IPDI is then hydrolyzed to form amino terminal group, which is further grafted with phosphorylcholine glyceraldehyde to establish a biocompatible hydrophilic structure on the surface. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the successful grafting of both PEG and phosphorylcholine functional groups on the surface. The decrease of the water contact angle for the modified film is caused by synergic effect of PEG and phosphorylcholine, which both have the high hydrophilicity. Furthermore, the number of platelets adhered is relative low on the synergetically modified PCU film compared with the PCU film modified only by poly(PEGMA). Our synergic modification method using both PEG and phosphorylcholine may be applied in surface modification of blood-contacting biomaterials and some relevant devices.

Keywords

poly(ethylene glycol) monoacrylate / phosphorylcholine / polycarbonateurethane / surface modification / anti-platelet adhesion / biomaterials

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Acknowledgements

This work has been financially supported by Ministry of Science and Technology of China (Grants No. 2013DFG52040 and 2008DFA51170), National Natural Science Foundation of China (Grant No. 31370969), and Ph.D. Programs Foundation of Ministry of Education of China (No. 20120032110073).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg