Preparation and characterization of Lignin-graft-poly (ɛ-caprolactone) copolymers based on lignocellulosic butanol residue

- The BBL-g-PCL copolymers exhibited higher thermal stability than BBL.
- The BBL-g-PCL copolymer coating film has good UV-absorbent ability.
- Improved utilization of biobutanol lignin (BBL).