Molecular Dynamics Study of Chitosan Adsorption at a Silica Surface.

ABSTRACT: Chitosan is a nontoxic biopolymer with many potential biomedical and material applications due to its biodegradability, biocompatibility, and antimicrobial properties. Here, fully atomistic molecular dynamics simulations and enhanced sampling methods have been used to study the adsorption mechanism of chitosan oligomers on a silica surface from an aqueous solution. The free energy of adsorption of chitosan on a silica surface was calculated to be 0.6 kcal mol^-1 per monomer in 0.15 mol L^-1 aqueous solution, which is comparable to k _B T at room temperature. The loading capacity of chitosan on the silica surface was found to be 0.094 mg m^-2, and it is dominated by charge compensation. Furthermore, the hydrogen bonding between chitosan

SUBMITTER: Hudek M 

PROVIDER: S-EPMC11664576 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature