A Strategy to Develop Bioactive Nanoarchitecture Cellulose: Sustained Release and Multifarious Applications

Area of Science:

• Materials Science
• Nanotechnology
• Biomaterials Engineering

Background:

• Cellulose membranes are typically hydrophilic, limiting their applications.
• Introducing hydrophobic and antimicrobial properties is desirable for advanced material functionalities.

Purpose of the Study:

• To engineer superhydrophobic cellulose membranes with polymer-grafted nanosilver.
• To create a core-shell nanostructure for enhanced material properties.
• To explore applications in oil-water separation and antimicrobial wound healing.

Main Methods:

• A soft chemical process involving layer-over-layer formulation was used.
• Amide bond formation between polymer anhydride units and aminosiloxane-functionalized cellulose created superhydrophobic domains.
• Characterization involved XPS, XRD, 29Si-NMR, FTIR, SEM, and TEM.

Main Results:

• Uniform short linear silver nanowires (60 nm diameter, 288 nm length) were synthesized.
• A hierarchical cellulose surface with a core-shell nanostructure was successfully developed.
• The polymer matrix stabilized nanosilver colloids, enhancing antimicrobial efficacy.

Conclusions:

• The developed biodegradable nanocomposite cellulose surface exhibits superhydrophobicity.
• Potential applications include oil-water separation membranes and antimicrobial agents.
• pH-triggered sustained release of colloidal silver for wound healing and smart bandages is feasible.