Flexible Lignin-based hydrogels with Self-healing and adhesive ability driven by noncovalent interactions

Flexible and adhesive hydrogels with self-healing abilities have great potential in various fields. In the present study, a new type of self-healing and adhesive hydrogel driven by noncovalent interactions including hydrogen bonds and hydrophobic interactions was readily constructed by mixing lignosulfonate (LS) and polyvinylpyrrolidone (PVP) in water. When the pH value was adjusted to neutral, LS aggregated to form rigid noncovalent junctions...