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Research article2024Peer reviewedOpen access

Micromorphology and native extractive behaviour of wood powder

Das, Atanu Kumar; Agar, David A.; Rudolfsson, Magnus; Kilpelainen, Petri; Tienaho, Jenni; Fernando, Dinesh

Abstract

The transition to a bioeconomy is attracting the use of wood powders for developing bio-based chemicals, fuels, and products to replace fossil-based products. Wood powder-based products depend on the properties and quality of wood powders. Despite many studies on their morphological and physical properties, studies on micromorphology and extractive micro-distribution are scarce. Here we investigated the effect of milling type and wood quality in terms of moisture content on microstructural changes and native extractive distribution in wood powders. The findings showed that non-dried and dried multi-blade shaft mill (MBSM) powders had smooth surfaces and less undamaged cellulosic fibre walls, and extractives were located in the cell lumen. Non-dried and dried hammer mill powders had a rough surface and fibres with structural deformations in their cell walls (e.g. dislocations). Extractives were redistributed on the particle surface as well as dispersed in the cell lumen for both types of hammer mill powders. In a word, the powders obtained from MBSM technology are more native in structure. The findings of the study can have implications for downstream processes.

Keywords

Milling techniques; Cytochemical staining; Drying; Extractive distribution

Published in

Scientific Reports
2024, volume: 14, number: 1, article number: 25548
Publisher: NATURE PORTFOLIO

SLU Authors

UKÄ Subject classification

Paper, Pulp and Fiber Technology
Wood Science

Publication identifier

  • DOI: https://doi.org/10.1038/s41598-024-75716-3

Permanent link to this page (URI)

https://res.slu.se/id/publ/139254