Delignification and Ionic Liquid Treatment of Wood toward Multifunctional High-Performance Structural Materials

• DOI: 10.1021/acsami.0c02221
• Publication Date: 2020-04-27T09:33:05Z
• Authors: Alexey Khakalo; Atsushi Tanaka; Antti Korpela; Hannes Orelma
• Keywords: Surface Modification; Cellulose fiber

Wood-based multifunctional materials with excellent mechanical performance are increasingly considered for sustainable advanced applications due to their unique hierarchical structure and inherent reinforcing cellulose phase orientation. Nonetheless, a wider multipurpose utilization of wood is so far hampered because constraints arising from scalable functionalization, efficient processing, facile shaping as well asnatural heterogeneity durability. This study introduces all-wood material fabrication method relying on delignification, ionic liquid (IL) treatment, pressure-assisted consolidation wood. Structure-retaining controlled delignification was performed enable direct access the assembly, while preserving highly aligned thus beneficial structural directionality. As following step, obtained biobased scaffold an increased porosity infiltrated IL heat-activated partially dissolve soften fiber surface. Samples washed water remove exhibited pronounced isotropic flexibility, which upon combined compression lateral shear allowed various 3D shapes adjustable architecture. The very compact totally additive-free were extensively characterized, revealing superior performance, gained multifunctionality compared native