作者：Yuanyuan Han, Jiani Ma, Yu Hu, Jing Jin, Wei Jiang
关键字：环形聚合物, 蛋白质吸附, 防污, Monte Carlo模拟, 端接枝聚合物
论文来源：期刊
具体来源：Langmuir, 2018, 34(5), 2073-2080
发表时间：2018年
摘要：采用Monte Carlo模拟与实验相结合的方法，研究了聚合物刷构象结构对其蛋白质抵抗性能的影响。模拟考虑线性构象和环形构象两种端接枝聚合物，考察了线性和环形聚合物接枝表面的蛋白质吸附行为，并采用了不同的链长和接枝数。模拟结果表明，对于长聚合物刷，线性构象向环形构象转变通常可提高其蛋白质抵抗性能，且在特定接枝数下可实现蛋白质抵抗性能的显著提升。模拟还揭示，表面光滑性和致密不可渗透层的形成是环形聚合物刷抵抗蛋白质吸附的两个重要特征。同时，实验结果也表明，在给定链长和接枝数下，环形聚合物刷的蛋白质抵抗性能优于线性聚合物接枝表面，与模拟结果高度一致。这些结果进一步阐明线性和环形聚合物刷在蛋白质抵抗性能上的差异，为未来制备优异防污材料提供了有用信息。
Abstract：Monte Carlo simulation combined with experimental method was used to investigate the effect of conformational structure of polymer brushes on their protein resistance. The end-grafted polymers with two conformational structures, i.e., linear and looped, were considered. Protein adsorption behaviors on the surfaces grafted with either linear or looped polymers were investigated. Different chain lengths and grafting numbers of end-grafted polymers were employed in this simulation. The simulation results indicated that for long polymer brushes, the conformational change from linear to looped generally improved their protein resistant property for all the grafting numbers investigated here, and a remarkable improvement of protein resistance can be achieved at a certain grafting number. Moreover, the simulations revealed that the smoothness of surface and the formation of a dense impenetrable layer are the two significant characteristics of the looped polymer brush in resisting protein adsorption. Meanwhile, experiment results also showed that for a given chain length and grafting number, the protein resistant property of the looped polymer brush was superior to that of the surface grafted with linear polymers, which is quite consistent with the simulation results. These results further elucidated the difference in protein resistant property between the linear and looped polymer brushes, which provided useful information for preparing excellent antifouling materials in future experiments.
论文链接：https://doi.org/10.1021/acs.langmuir.7b03930