Study On Adsorption Properties Simulation Of Multi-Chain Polymer On The Surface

Adsorption properties of polymer chains on the surface with attraction effect are related to the coverage of the polymer chains on the surface,and are related to the strength of the effect of the surface on the polymer chain units.The adsorption process of polymer chains on the surface is an important subject in the field of physics and biology.Through the adsorption effect of polymer chains on the surface,the relevant properties of some physical devices are improved,and the relevant properties of proteins on the surface are changed.In polymer chain research,in addition to experimental methods,computer simulations are used as the main scientific research methods,and they are widely used in the simulation of polymer chains.Computer simulations can help to understand the microscopic mechanism of surface adsorption of macromolecular chains.In this thesis,the Monte Carlo simulation method was used to study the adsorption characteristics and conformational properties of polymer chains on the surface.Through comparative analysis with the related properties of polymer single chains,the conformation of polymer chains on the adsorption surface under different physical conditions was grasped.Characteristics,the calculation of the critical temperature point for adsorption of macromolecules on the surface was discussed,and the relationship between the critical adsorption temperature and the number of macromolecular chains was revealed,and the length of the macromolecular multi-strand chain was further studied for the critical adsorption temperature.influences.The main research contents and innovations of this paper are as follows:In this dissertation,the Monte Carlo simulation method based on the simple cubic lattice model is mainly used to investigate the near-temperature point and related adsorption characteristics of different concentrations of multi-chain polymer surface adsorption.In the simulation,the idea of coarse graining was adopted to treat the molecular groups and structures of macromolecules as polymer chains,and the polymer chains were generated by self-avoidance walking.The thermal motion of macromolecules was realized by the bond length fluctuation.Through the analysis of multi-chain polymer related parameters,such as<M>,<R~2>,<R_g~2>and<A>,statistical mechanics analysis was carried out to obtain the critical temperature of adsorption of polymer chains on the surface,and the concentration of polymer chains on critical adsorption sites.The influences and the dynamic processes of multiple polymer chains were discussed.The research methods and results of this dissertation can provide new ideas for surface modification of solids or proteins.The research results provide experimental evidence for the establishment and improvement of adsorption theory of multi-chain polymer,and have important theoretical significance for the separation of proteins,DNA and other biological macromolecules.