Amphiphilic Copolymers for Versatile, Facile, and In Situ Tunable Surface Biofunctionalization

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Polymer Science

Background:

• Precision surface engineering is critical for developing advanced biomaterials.
• Existing methods for surface biofunctionalization can be limited in versatility and control.

Purpose of the Study:

• To report a new platform of PEGylated styrene-maleic acid copolymers for adsorptive surface biofunctionalization.
• To demonstrate the tunable properties of these "anchor polymers" (APs) for controlling surface characteristics and bioactivity.

Main Methods:

• Synthesis of PEGylated styrene-maleic acid copolymers with tunable amphiphilicity.
• Characterization of copolymer adsorption onto various surfaces.
• Functionalization of adsorbed layers with biomolecules (glycosaminoglycans, peptides, antimicrobials).
• Demonstration of in situ surface alteration via homo- and heterodisplacement.

Main Results:

• APs exhibit balanced amphiphilicity, enabling water solubility and strong surface affinity.
• Molecular architecture tuning controls AP anchorage and adsorbed layer structure.
• Functionalized surfaces supported controlled bacterial adhesion, endothelial cell, and induced pluripotent cell growth.
• In situ surface renewal and alteration were successfully demonstrated.

Conclusions:

• Anchor polymers provide a versatile, simple, and robust platform for biomaterial surface customization.
• The ability to tune APs and alter surfaces in situ opens new possibilities for biotechnological applications.