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Lignin-Retaining Transparent Wood
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-1591-5815
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.ORCID iD: 0000-0003-1161-9311
KTH, School of Electrical Engineering (EES).ORCID iD: 0000-0002-3368-9786
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2017 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 10, no 17, p. 3445-3451Article in journal (Refereed) Published
Abstract [en]

Optically transparent wood, combining optical and mechanical performance, is an emerging new material for light-transmitting structures in buildings with the aim of reducing energy consumption. One of the main obstacles for transparent wood fabrication is delignification, where around 30wt% of wood tissue is removed to reduce light absorption and refractive index mismatch. This step is time consuming and not environmentally benign. Moreover, lignin removal weakens the wood structure, limiting the fabrication of large structures. A green and industrially feasible method has now been developed to prepare transparent wood. Up to 80wt% of lignin is preserved, leading to a stronger wood template compared to the delignified alternative. After polymer infiltration, a high-lignin-content transparent wood with transmittance of 83%, haze of 75%, thermal conductivity of 0.23WmK(-1), and work-tofracture of 1.2MJm(-3) (a magnitude higher than glass) was obtained. This transparent wood preparation method is efficient and applicable to various wood species. The transparent wood obtained shows potential for application in energy-saving buildings.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2017. Vol. 10, no 17, p. 3445-3451
Keywords [en]
building materials, delignification, energy saving, lignin, wood
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-273382OAI: oai:DiVA.org:kth-273382DiVA, id: diva2:1430500
Funder
EU, European Research Council, 742733
Note

QC 20171024

Available from: 2020-05-15 Created: 2020-05-15 Last updated: 2020-05-15Bibliographically approved

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Li, YuanyuanRojas, RamiroYan, MinLawoko, MartinBerglund, Lars

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