Formation and cleaning function of physically cross-linked dual strengthened water-soluble chitosan-based core-shell...

Area of Science:

• Materials Science
• Environmental Science
• Chemical Engineering

Background:

• Developing efficient adsorbents for environmental remediation is crucial.
• Core-shell structures offer unique properties for adsorption applications.
• Chitosan, sodium alginate, and PVA are biocompatible polymers with potential for modification.

Purpose of the Study:

• To synthesize double strengthened core-shell particles using WSC, SA, and PVA.
• To investigate the adsorption capabilities of these particles for carbon dioxide and heavy metal ions (Pb(II) and Cu(II)).
• To evaluate the structural and thermal properties of the synthesized particles.

Main Methods:

• Preparation of core-shell particles via ionic cross-linking and freeze/thaw cycles.
• Characterization using Fourier transform infrared spectra (FTIR), dynamic mechanical thermal analysis (DMTA), and thermogravimetric analysis (TGA).
• Adsorption experiments to determine capacity and rate for CO2, Pb(II), and Cu(II).

Main Results:

• Successfully synthesized double strengthened core-shell particles.
• Enhanced storage modulus and thermal stability of the core-shell hydrogel particles.
• High adsorption capacities for CO2 (199.62 mg/g), Pb(II) (39.28 mg/g), and Cu(II) (26.03 mg/g).
• Significant binding rates for Pb(II) (26.57%/min) and Cu(II) (4.30%/min) at the initial stage.

Conclusions:

• The developed core-shell particles exhibit excellent adsorption performance for CO2 and heavy metal ions.
• The facile synthesis method and enhanced properties make these particles promising for hazardous substance removal.
• This study highlights the potential of WSC/SA/PVA core-shell particles in environmental remediation applications.