Polylactide-Grafted Metal-Alginate Aerogels.

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Alginate aerogels are versatile biomaterials with tunable properties.
• Functionalization of alginate aerogels is crucial for expanding their applications.
• Grafting synthetic polymers onto alginate can enhance material characteristics.

Purpose of the Study:

• To develop a new method for synthesizing polylactide-grafted metal-alginate (g-M-alginate) aerogels.
• To investigate the structural and material properties of these novel aerogels.
• To explore the potential of this methodology for creating advanced alginate-based materials.

Main Methods:

• Synthesis of M-alginate beads (M: Ca²⁺, Co²⁺, Ni²⁺, Cu²⁺).
• Grafting of DL-lactide (LA) onto alginate backbone via ring-opening polymerization using stannous octoate catalyst.
• Characterization of aerogel morphology, porosity, surface area, and composition.

Main Results:

• Successfully synthesized g-M-alginate aerogels with retained fibrous morphology.
• Achieved lightweight (bulk densities up to 0.24 g cm^-3) and highly porous (up to 96% v/v) materials.
• Reported BET surface areas ranging from 154-542 m² g^-1, with polylactide content varying by metal type.

Conclusions:

• Demonstrated a novel methodology for functionalizing alginate aerogels via PLA grafting.
• The grafting process preserves the inherent fibrous structure of alginate aerogels.
• This approach enables the synthesis of advanced polylactide-crosslinked alginate aerogels.