Shape stable poly(vinyl alcohol) and alginate cross-linked hydrogel with borate anions under dry–rewet cycles
Journal
Journal of the Taiwan Institute of Chemical Engineers
Date Issued
2019
Author(s)
Abstract
The poly(vinyl alcohol) (PVA) and alginate hydrogels crosslinked at pH >9 with sodium tetrahydroxyborate (PVA-Bb) hydrogels are shape-stable under repeated dry–rewet cycles. Further crosslinking with sulfate ions to substitute the involved borate complex (PVA-Sb) only moderately enhanced the hydrogel stability. The B(OH)4 − cores constitute the skeleton of the PVA-Bb matrix under alkaline condition, which is different from the B(OH)3 cores that are noted principally constituting the hydrogel matrix formed under acidic condition. The shape-stable PVA-Bb Prussian blue (PB) immobilized hydrogels are effective adsorbent of Cs+ ions from waters. The Cs+ permeabilities for PVA-Bb and PVA-Sb hydrogels are close.
SDGs
Type
journal article