TY - JOUR
T1 - Comparing the properties of cellulose nanofibrils from wood and bark of Norway spruce (Picea abies KARST.) and silver poplar (Populus alba L.)
AU - Supriyadi, Didik
AU - Bodner, Sabine
AU - Keckes, Jozef
AU - Gindl-Altmutter, Wolfgang
AU - Veigel, Stefan
N1 - Publisher Copyright: © 2024 The Author(s)
PY - 2024/6/4
Y1 - 2024/6/4
N2 - Bark, an underutilized biomass resource, is a promising raw material for cellulose nanofibrils (CNF) production due to its renewability, abundance, and low cost. Because data on the physical and chemical properties of bark-based CNF is scarce, we investigated the feasibility of CNF production from two different bark species (Norway spruce and silver poplar) using a combination of sequential extraction, delignification, and mechanical fibrillation. The chemical composition, crystallinity index, morphology, fibril diameter, thermal stability, and mechanical properties of the CNF were evaluated and compared with those of wood-based CNF from the same species. The results showed that spruce bark yielded CNF virtually undistinguishable from spruce wood-derived CNF in terms of structure and mechanical properties of nanopapers made thereof. Nanopapers prepared from spruce wood and bark showed comparable tensile strength and Young's modulus of around 130 MPa and 15 GPa, respectively. Contrarily, CNF derived from poplar bark were different in structure compared to poplar wood CNF, and nanopapers produced from poplar bark CNF showed only modest mechanical performance. In summary, the extensive characterization carried out demonstrated the general feasibility of CNF production from tree bark but also revealed the need for further optimization, like in the case of poplar bark.
AB - Bark, an underutilized biomass resource, is a promising raw material for cellulose nanofibrils (CNF) production due to its renewability, abundance, and low cost. Because data on the physical and chemical properties of bark-based CNF is scarce, we investigated the feasibility of CNF production from two different bark species (Norway spruce and silver poplar) using a combination of sequential extraction, delignification, and mechanical fibrillation. The chemical composition, crystallinity index, morphology, fibril diameter, thermal stability, and mechanical properties of the CNF were evaluated and compared with those of wood-based CNF from the same species. The results showed that spruce bark yielded CNF virtually undistinguishable from spruce wood-derived CNF in terms of structure and mechanical properties of nanopapers made thereof. Nanopapers prepared from spruce wood and bark showed comparable tensile strength and Young's modulus of around 130 MPa and 15 GPa, respectively. Contrarily, CNF derived from poplar bark were different in structure compared to poplar wood CNF, and nanopapers produced from poplar bark CNF showed only modest mechanical performance. In summary, the extensive characterization carried out demonstrated the general feasibility of CNF production from tree bark but also revealed the need for further optimization, like in the case of poplar bark.
KW - Bark
KW - Nanocellulose
KW - Nanopaper
KW - Poplar
KW - Spruce
UR - http://www.scopus.com/inward/record.url?scp=85195364314&partnerID=8YFLogxK
U2 - 10.1016/j.carpta.2024.100527
DO - 10.1016/j.carpta.2024.100527
M3 - Article
AN - SCOPUS:85195364314
SN - 2666-8939
VL - 7.2024
JO - Carbohydrate polymer technologies and applications
JF - Carbohydrate polymer technologies and applications
IS - June
M1 - 100527
ER -