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2014年 第8卷 第2期

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《化学科学与工程前沿（英文）》 >> 2014年 第8卷 第2期 doi: 10.1007/s11705-014-1414-1

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

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.2. Tianjin University-Helmholtz-Zentrum Geesthacht, Joint Laboratory for Biomaterials and Regenerative Medicine, Tianjin 300072, China.3. Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China.4. University of Rostock, Department of Cardiac Surgery, Reference & Translation Center for Cardiac Stem Cell Therapy, Schillingallee 69, D-18057 Rostock, Germany

发布日期： 2014-05-22
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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.

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