Ma Chunfeng, Xu Liguo, Xu Wentao, Zhang Guangzhao
Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, P. R. China.
J Mater Chem B. 2013 Jun 28;1(24):3099-3106. doi: 10.1039/c3tb20454e. Epub 2013 May 20.
Degradable polyurethane (PU) with copolyester oligomer consisting of ε-caprolactone (CL) and glycolide (GA) as the soft segments has been prepared by a combination of ring-opening polymerization and condensation reaction. Enzymatic and hydrolytic degradation experiments demonstrate that the PU can degrade in seawater. Such a polyurethane exhibit a more rapid degradation in comparison with that with poly(ε-caprolactone) (PCL) soft segments because the introduction of GA can reduce the crystallinity, as revealed by differential scanning calorimetry (DSC) and polarizing optical microscope (POM). Marine field tests show that the degradable polyurethane has good antifouling ability due to its self-renewal property. Besides, such polyurethane can serve as a carrier and controlled release system for an antifoulant, and the incorporation of an antifoulant in the polyurethane can significantly improve the antifouling ability and duration.
通过开环聚合和缩合反应相结合的方法制备了以ε-己内酯（CL）和乙交酯（GA）组成的共聚酯低聚物作为软段的可降解聚氨酯（PU）。酶解和水解降解实验表明，该PU在海水中能够降解。与具有聚（ε-己内酯）（PCL）软段的聚氨酯相比，这种聚氨酯表现出更快的降解速度，因为差示扫描量热法（DSC）和偏光显微镜（POM）显示，GA的引入可以降低结晶度。海洋现场测试表明，这种可降解聚氨酯由于其自我更新性能而具有良好的防污能力。此外，这种聚氨酯可以作为防污剂的载体和控释系统，并且在聚氨酯中加入防污剂可以显著提高防污能力和持续时间。
