The interactions between quartz surface and two types of polymer materials (PMMA and PVA) were studied by means of all- atoms molecular dynamics simulation. An apparently adsorption processcouldbeobserved by theexamination oftrajectoriesofboth molecules. To assess the detailed structural and thermodynami- cal aspects of adsorption process, the density profile of different atom species in polymers, hydrogen bonds, radius of gyration and adsorption energy were calculated. The results of density profile and hydrogen bonds both indicated that carbonyl group played a crucial role in the adsorption process. In addition, there were more hydrogen bonds formed in PVA/quartz system than PMMA. The radius of gyration verified the molecular configuration changes in the adsorption process. In conclusion, two polymer molecules both had strong adsorption onto quartz surface, but there was no significant difference in the adsorption energies for these two polymers.
This study was done in the vacuum and dry condition. How- ever, the effect of water in the adsorption process could not be ignored. More work focusing on the interaction between polymer molecules and quartz surface in aqueous condition will be carried out in further studies.