Journal
MATERIALS
Volume 13, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/ma13081940
Keywords
lignin; shape memory; fractionation; thermomechanical property; intrinsic viscosity; shape fixity; stress recovery
Categories
Funding
- US Department of Energy (DOE) [DE-AC05-00OR22725]
- BioEnergy Technologies Office within the DOE Office of Energy Efficiency and Renewable Energy
Ask authors/readers for more resources
We report a facile approach to control the shape memory effects and thermomechanical characteristics of a lignin-based multiphase polymer. Solvent fractionation of a syringylpropane-rich technical organosolv lignin resulted in selective lignin structures having excellent thermal stability coupled with high stiffness and melt-flow resistance. The fractionated lignins were reacted with rubber in melt-phase to form partially networked elastomer enabling selective programmability of the material shape either at 70 degrees C, a temperature that is high enough for rubbery matrix materials, or at an extremely high temperature, 150 degrees C. Utilizing appropriate functionalities in fractionated lignins, tunable shape fixity with high strain and stress recovery, particularly high-stress tolerance were maintained. Detailed studies of lignin structures and chemistries were correlated to molecular rigidity, morphology, and stress relaxation, as well as shape memory effects of the materials. The fractionation of lignin enabled enrichment of specific lignin properties for efficient shape memory effects that broaden the materials' application window. Electron microscopy, melt-rheology, dynamic mechanical analysis and ultra-small angle neutron scattering were conducted to establish morphology of acrylonitrile butadiene rubber (NBR)-lignin elastomers from solvent fractionated lignins.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available