聚合物刚性对聚合物在平面表面吸附相行为的影响。

Effect of polymer rigidity on the phase behaviour of polymer adsorption on to planar surface.

作者信息

Yang Zhiyong, Chai Aihua, Zhou Peicong, Li Ping, Yang Yongfu

机构信息

Department of Physics, Jiangxi Agricultural University, Nanchang, Jiangxi 330045, China

College of Mathematics, Physics and Information Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China.

出版信息

Biosci Rep. 2016 Nov 22;36(6). doi: 10.1042/BSR20160220. Print 2016 Dec.

DOI:10.1042/BSR20160220

PMID:27756826

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5293574/

Abstract

We study the process of a semiflexible polymer chain adsorption on to planar surface by the dynamic Monte Carlo (DMC) method, based on the 3D off-lattice model. Both the strength of attractive monomer-surface interaction (ε) and bending energy (b) have pronounced effect on the adsorption and shape of semiflexible polymer chain. The semiflexible polymer can just fully adsorb on to the surface at certain ε, which is defined as critical ε The essential features of the semiflexible polymer adsorption on to surface are that (i) the critical ε increases with increase in b; (ii) the shape of the fully adsorbed semiflexible polymer chain is film-like toroid, and the toroid becomes more and more perfect with increase in b In addition, the size of toroid and the number of turns of toroid can be controlled by the b and ε.

摘要

我们基于三维无格点模型，采用动态蒙特卡罗（DMC）方法研究了半柔性聚合物链在平面表面上的吸附过程。单体与表面之间的吸引相互作用强度（ε）和弯曲能（b）对半柔性聚合物链的吸附和形状都有显著影响。半柔性聚合物在特定的ε下才能完全吸附在表面上，该特定的ε被定义为临界ε。半柔性聚合物在表面上吸附的基本特征是：（i）临界ε随b的增加而增加；（ii）完全吸附的半柔性聚合物链的形状为薄膜状环面，并且随着b的增加，环面变得越来越完美。此外，环面的尺寸和环面的匝数可以通过b和ε来控制。