Suberic acid acts as a dissolving agent as well as a crosslinker for natural polymers (carbohydrate and Protein): A detailed discussion on the chemistry behind the interaction

The natural polysaccharide chitosan and the natural protein collagen are widely used for the preparation of biopolymer materials in the presence of suitable crosslinkers. In this study, crosslinking feasibility of a dicarboxylic acid, namely suberic acid was tested using chitosan and collagen and in addition, thermal and mechanical properties were also tested for the resulting biopolymers. A 3D scaffold biopolymer material was prepared using chitosan at 1.0% (w/v) in the presence of suberic acid at 0.2% (w/v), similarly collagen 0.5% (w/v) in the presence of suberic acid 0.2% (w/v). Upon interaction, both the biopolymers displayed appreciable mechanical and thermal properties which add value to the biopolymers for biomedical applications. Molecular docking studies suggests the non-covalent interactions between the natural polymers and suberic acid is the reason behind the improved properties.