1/3/2023 0 Comments Petri color 35![]() ![]() The addition of LCC enhanced oxygen barrier properties of HEC films significantly even at high relative humidity. Breaking strain measurements revealed a non-linear correlation with the LCC concentration for the samples with higher lignin than hemicellulose content. Increasing the LCC content increased the yield point and Young’s modulus of the films. Free-standing composite films containing hydroxyethyl cellulose (HEC) and LCCs with varying molar mass, charge density and lignin/hemicellulose ratio were prepared to study the effect of LCC amount on mechanical properties and oxygen permeability. This study presents how LCCs, derived from pulp mill effluent, can be turned into valuable biopolymers for industrial polymer film applications. In biomass fractionation processes, these complexes are conventionally considered as waste, which hinders the biomass fractionation process, and they may solubilize into aqueous effluents. Lignocellulose biomass contains lignin and carbohydrates that are covalently linked into lignin-carbohydrate complexes (LCCs). Valorization of side streams offers novel types of raw materials to complement or replace synthetic and food-based alternatives in materials science, increasing profitability and decreasing the environmental impacts of biorefineries. 3Department of Food and Nutrition and Helsinki Institute of Sustainability Science, University of Helsinki, Helsinki, Finland.2Research and Development Center, Kemira Oyj, Espoo, Finland.1Department of Bioproducts and Biosystems, Aalto University, Espoo, Finland.Brita Asikanius 1,2*, Anna-Stiina Jääskeläinen 2, Hanna Koivula 3, Petri Oinonen 4 and Monika Österberg 1* ![]()
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