Assertion: lignin's use | /r/HasProperty | challenge
Facets:
Source sentences:
text: The use of kraft lignin to produce high-added-value products is a challenge due to the low yield, high costs, the validation of the new products by the performance testing, and the challenges involved in the integration of biorefinery (Wang et al. 2019).
text: Lignin has been employed in formulation of elastomeric and thermoset materials (Thielemans et al. 2002); but the use of lignin in the formulation of thermoplastic composites has been a challenge (Hilburg et al.