Tunable Lignin-Based Hydrogels for Enhanced Water Retention and Sustained Urea Release in Agriculture
Agricultural hydrogels with high lignin content are promising sustainable alternatives to petroleum-based superabsorbents. Here, kraft lignin was modified by Ce(IV)-initiated graft polymerization with polyacrylamide (PAAm), poly(acrylic acid) (PAAc), and their copolymers to produce lignin-derived hydrogels with tunab...