All-Wood Composite Material by Partial Fiber Surface Dissolution with an Ionic Liquid

Show simple item record Khakalo, Alexey Tanaka, Atsushi Korpela, Antti Hauru, Lauri K. J. Orelma, Hannes 2020-01-29T16:13:02Z 2020-01-29T16:13:02Z 2019-02-04
dc.identifier.citation Khakalo , A , Tanaka , A , Korpela , A , Hauru , L K J & Orelma , H 2019 , ' All-Wood Composite Material by Partial Fiber Surface Dissolution with an Ionic Liquid ' , ACS Sustainable Chemistry & Engineering , vol. 7 , no. 3 , pp. 3195-3202 .
dc.identifier.other PURE: 130940014
dc.identifier.other PURE UUID: faa83b8b-d1f1-4a6d-a4c1-b9188c6bc8ab
dc.identifier.other WOS: 000458086100038
dc.identifier.other ORCID: /0000-0002-2951-8546/work/68617857
dc.description.abstract Synthetic structural materials of high mechanical performance are typically either of large weight (for example, steels, and alloys) or involve complex manufacturing processes and thus have high cost or cause adverse environmental impact (for example, polymer-based and biomimetic composites). In this perspective, low-cost, abundant and nature-based materials, such as wood, represent particular interest provided they fulfill the requirements for advanced engineering structures and applications, especially when manufactured totally additive-free. Here, we report on a novel all-wood material concept based on delignification, partial surface dissolution using ionic liquid (IL) followed by densification resulting in a high-performance material. A delignification process using sodium chlorite in acetate buffer solution was applied to controllably delignify the entire bulk wooden material while retaining the highly beneficial structural directionality of wood. In a subsequent step, obtained delignified porous wood template was infiltrated with an IL 1-ethyl-3-methylimidazolium acetate, [EMIM]OAc and heat activated at 95 degrees C to partially dissolve the fiber surface. Afterward, treated wood was washed with water to remove IL and hot-pressed to gain a very compact cellulosic material with fused fibers while retaining unidirectional fiber orientation. The obtained cellulose materials were structurally, chemically, and mechanically characterized revealing superior tensile properties compared to native wood. Furthermore, suggested approach allows almost 8-fold tensile strength improvement in the direction perpendicular to fiber orientation, which is otherwise very challenging to achieve. en
dc.format.extent 15
dc.language.iso eng
dc.relation.ispartof ACS Sustainable Chemistry & Engineering
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject All-cellulose composite
dc.subject Ionic liquid
dc.subject Dissolution
dc.subject Deltgnification
dc.subject Wood modification
dc.subject CELLULOSE
dc.subject IR
dc.subject TEMPERATURE
dc.subject 116 Chemical sciences
dc.title All-Wood Composite Material by Partial Fiber Surface Dissolution with an Ionic Liquid en
dc.type Article
dc.contributor.organization Department
dc.description.reviewstatus Peer reviewed
dc.relation.issn 2168-0485
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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