Ultra-fast self-healing PVA organogels based on dynamic covalent chemistry for dye selective adsorption

Abstract

Ultra-fast self-healing organogels based on dynamic covalent chemistry for dye adsorption were prepared from polyvinyl alcohol (PVA), 4-formylphenylboronic acid (FPBA), and tartaric acid dihydrazide (TDH) by an effective in situ reaction approach. The relative xerogels can adsorb methylene blue selectively with high efficiency. The boronate ester bonds and acylhydrazone bonds endow organogels with a very fast self-healing property. What's more, the chirality can be transferred from TDH to the organogels. The organogels obtained from L-TDH and D-TDH show opposite chirality according to the circular dichroism spectra.