Integrating Biological Architecture and Biomaterial Function: Exploring the Native Hydrogel Structure of Brown...

Area of Science:

• Biomaterials Science
• Marine Biotechnology
• Hydrogel Engineering

Background:

• Brown seaweed possesses a natural hydrogel-like structure composed of alginate and cellulose.
• Engineered hydrogels often require extensive synthetic processing.
• Leveraging seaweed's native architecture offers a sustainable alternative.

Purpose of the Study:

• To investigate the development of functional hydrogel biomaterials from brown seaweed.
• To minimize synthetic and chemical processing by exploiting native structure-function relationships.
• To evaluate the properties of seaweed-derived hydrogels in various formats.

Main Methods:

• Exploiting intrinsic seaweed structure and composition.
• Processing seaweed into native, purified, and fibrillated forms.
• Reassembling fibrillated seaweed into hydrogels and foams using 3D printing and freeze-drying.
• Characterizing structure, stability, liquid absorption, porosity, mechanical, rheological, and cytocompatibility properties.

Main Results:

• Biomaterials created with minimal processing exhibited high liquid absorption (~3600%) and porosity (~93%).
• Shape-memory behavior was observed after compression.
• Cytocompatibility was concentration-dependent, with ~73% viability at 50% extract and ~59% at full concentration.
• Preserving natural architecture minimized synthetic input.

Conclusions:

• Brown seaweed can be processed into functional hydrogel biomaterials with desirable properties.
• Minimal processing preserves native architecture, enhancing resource efficiency.
• The concentration-dependent cytocompatibility highlights the need to balance processing with biological performance for biomedical applications.