Metal-ion Adsorption by Hybrid Gel based on Polyaspartamide and Alginate

Abstract

A hydrogel based on poly(2-hydroxyethyl aspartamide) (PHEA) and alginate (Alg) derivatives, prepared by the 'click' reaction, has been utilized as a sorbent for the removal of metal-ions from aqueous media. PHEA/Alg hybrid gel exhibited high adsorption capacity for Cu(II) and Ni(II) with 75 and 60 mg/g, respectively. The hybrid gel possessed swelling degrees in the range of 60~80 g/g in ion-containing (2 wt/v%) water. The effects of pH, initial metal-ion concentration, temperature, and contact time, on the adsorption were investigated. The gel morphology and interaction between polymer and metal-ion were characterized by using SEM and FTIR spectroscopy. The kinetics and adsorption isotherms were better fitted to Langmuir model than Freundlich model, and pseudo-second-order adsorption kinetics described well the adsorption process.

Adhesive Composite Hydrogel Patch Based on a Polyaspartamide Derivative to Treat Atopic Dermatitis

“…[15] Polyaspartamide derivatives have excellent biocompatibility and biodegradability owing to their peptide backbone. [15][16][17] The functionalization of diverse pendants makes polyaspartamide derivatives promising materials in various fields, such as metal ion adsorption, [17] drug delivery, [18,19] and bone adhesion. [20] Furthermore, owing to their versatility, they are frequently used to make various hydrogels, including photocrosslinkable, [18] and dual-crosslinked hydrogels.…”