A sandcastle worm-inspired strategy to functionalize wet hydrogels

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Functionalization

Background:

• Hydrogels are widely used but functionalization is complex.
• Current methods require pre-organization of reactive sites, limiting flexibility.
• A need exists for simpler, versatile hydrogel functionalization techniques.

Purpose of the Study:

• To develop a facile, one-step strategy for functionalizing wet hydrogels.
• To utilize a bio-inspired adhesive tripeptide for stable molecule attachment.
• To enable diverse biological functionalities in hydrogels.

Main Methods:

• A novel tripeptide (dibutylamine-DOPA-lysine-DOPA) was synthesized and modified.
• This tripeptide was used to functionalize pre-formed wet hydrogels in a single step.
• Functionalized hydrogels were assessed for biological properties like antimicrobial activity and cell adhesion.

Main Results:

• The one-step strategy successfully functionalized wet hydrogels.
• The tripeptide enabled tunable functionalization degrees and stable attachment.
• Acquired biological functions included antimicrobial properties, enhanced cell adhesion, and wound repair capabilities.

Conclusions:

• A simple, one-step method for wet hydrogel functionalization was established.
• The bio-inspired tripeptide strategy offers a versatile tool for creating functional hydrogels.
• This approach simplifies the development of hydrogels for various biomedical applications.