From Wood and Hemp Biomass Wastes to Sustainable Nanocellulose Foams
Industrial Crops and Products 2021
Sergejs Beļuns, Sergejs Gaidukovs, Oskars Platnieks, Gerda Gaidukova, Inese Mieriņa, Līga Orlova, Olesja Starkova, Prans Brazdausks, Vijay Kumar Thakur

Transition to the circular economy requires the implementation of recycling and reuse routes for waste products. This research addresses one of the leading emerging areas, i.e., the development of sustainable materials and natural waste processing, namely wood and hemp byproducts. The cellulosic nanomaterials derived from these under-utilized waste residues and byproducts also serve as promising natural precursors for advanced applications, e.g., biomedical, pollution filtering, and thermal insulation. The wood and hemp fibrils were prepared by microfluidic processing of 0.2 – 1.0 wt% cellulose water suspensions. After freeze-drying, the resulting foam materials were characterized with a bulk density of 2 – 36 mg/cc. Key characteristics of the obtained hemp and wood nanocellulose (NC) foams were examined by the mechanical response, porosity, BET analysis, thermal conductivity, thermal degradation, chemical composition, and morphology. Hemp NC foams showed higher performance characteristics that coincide with almost twice the length of the fibrils, 1.5 times higher cellulose content, and a more homogeneous mesh-like structure compared to wood NC foams. In addition, the thermal performance of obtained NC foams was in the range of 34 – 44 mW/m·K, which makes their application comparable to commonly used insulation materials.

Atslēgas vārdi
cellulose nanofibrils | Cryogels | nanocellulose network | thermal conductivity modelling | ultralight porous structure

Beļuns, S., Gaidukovs, S., Platnieks, O., Gaidukova, G., Mieriņa, I., Grase, L., Starkova, O., Brazdausks, P., Kumar Thakur, V. From Wood and Hemp Biomass Wastes to Sustainable Nanocellulose Foams. Industrial Crops and Products, 2021, Vol. 170, Article number 113780. ISSN 0926-6690. Pieejams: doi:10.1016/j.indcrop.2021.113780

Publikācijas valoda
English (en)
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