Construction of antithrombotic and antimicrobial ultra-thin structures on a polyethylene terephthalate implant the surface grafting of heparin brushes.

It remains a challenge to endow a polymeric material with antithrombotic ability by surface grafting without disturbing the bulk properties of the substrate. Heparin-based functional structures of less than 80 nm were fabricated and covalently grafted on a polyethylene terephthalate surface carbene chemistry (Hep-g-PET). Heparin was oxidized with the minimum antithrombrin sequence retained, creating an aldehyde group on the chain terminus.

The Design of Rapid Self-Healing Alginate Hydrogel with Dendritic Crosslinking Network.

Self-healing alginate hydrogels play important roles in the biological field due to their biocompatibility and ability to recover after cracking. One of the primary targets for researchers in this field is to increase the self-healing speed. Sodium alginate was oxidized, generating aldehyde groups on the chains, which were then crosslinked by poly(amino) amine (PAMAM) via Schiff base reaction.