Interface tailoring by a versatile functionalization platform for nanostructured wood biocomposites

Montanari, Céline; Olsén, Peter; Berglund, Lars A.

doi:10.1039/d0gc02768e

Cited by 58 publications

(49 citation statements)

References 84 publications

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“…In a second stage, succinylation was performed on DW substrates by a recently developed green procedure, [ 47 ] to reduce moisture sensitivity and facilitate monomer impregnation. Cell wall modification was successful when DW was acetylated and impregnated by methyl methacrylate (MMA) monomer.…”

Section: Resultsmentioning

confidence: 99%

“…The interactions should be further improved in TW‐SA. The residual moisture content is lowered, [ 47 ] and in analogy with acetylation treatment, the tendency for cellulose fibril agglomeration should be decreased. [ 8 ] In addition, the terminal carboxyls introduced in DW‐SA can covalently link with PLIMA.…”

Section: Resultsmentioning

confidence: 99%

“…Succinylation was performed via ring‐opening esterification reaction of SA on the DW substrate in accordance to our previous protocol. [ 47 ] The ring‐opening esterification reaction was performed on DW under neat conditions for 0.5 h at 130 °C without stirring. After the reaction, the DW samples were thoroughly washed with acetone five times to remove any non‐bonded reagent.…”

Section: Methodsmentioning

confidence: 99%

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High Performance, Fully Bio‐Based, and Optically Transparent Wood Biocomposites

et al. 2021

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The sustainable development of engineering biocomposites has been limited due to a lack of bio‐based monomers combining favorable processing with high performance. Here, the authors report a novel and fully bio‐based transparent wood biocomposite based on green synthesis of a new limonene acrylate monomer from renewable resources. The monomer is impregnated and readily polymerized in a delignified, succinylated wood substrate to form optically transparent biocomposites. The chemical structure of the limonene acrylate enables diffusion into the cell wall, and the polymer phase is both refractive index‐matched and covalently linked to the wood substrate. This results in nanostructured biocomposites combining an excellent optical transmittance of 90% at 1.2 mm thickness and a remarkably low haze of 30%, with a high mechanical performance (strength 174 MPa, Young's modulus 17 GPa). Bio‐based transparent wood holds great potential towards the development of sustainable wood nanotechnologies for structural applications, where transparency and mechanical performance are combined.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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High Performance, Fully Bio‐Based, and Optically Transparent Wood Biocomposites

et al. 2021

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“…In a further development of the transparent wood concept, an intermediate step has been demonstrated by Montanari et al [79]. Following delignification, the wood substrate was grafted with either maleic, itaconic or succinic anhydride from renewable sources.…”

Section: Delignification Combined With Polymer Impregnation-transparent Woodmentioning

confidence: 99%

Review of Functional Treatments for Modified Wood

et al. 2021

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Wood modification is now widely recognized as offering enhanced properties of wood and overcoming issues such as dimensional instability and biodegradability which affect natural wood. Typical wood modification systems use chemical modification, impregnation modification or thermal modification, and these vary in the properties achieved. As control and understanding of the wood modification systems has progressed, further opportunities have arisen to add extra functionalities to the modified wood. These include UV stabilisation, fire retardancy, or enhanced suitability for paints and coatings. Thus, wood may become a multi-functional material through a series of modifications, treatments or reactions, to create a high-performance material with previously impossible properties. In this paper we review systems that combine the well-established wood modification procedures with secondary techniques or modifications to deliver emerging technologies with multi-functionality. The new applications targeted using this additional functionality are diverse and range from increased electrical conductivity, creation of sensors or responsive materials, improvement of wellbeing in the built environment, and enhanced fire and flame protection. We identified two parallel and connected themes: (1) the functionalisation of modified timber and (2) the modification of timber to provide (multi)-functionality. A wide range of nanotechnology concepts have been harnessed by this new generation of wood modifications and wood treatments. As this field is rapidly expanding, we also include within the review trends from current research in order to gauge the state of the art, and likely direction of travel of the industry.

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“…For example, green polymer grafting approaches were applied to wood fiber and CNF surfaces through surface-initiated ring-opening polymerization of bio-derived lactones ( Lönnberg et al, 2006 ; Herrera et al, 2020 ; Olsén et al, 2020 ). Green delignification treatments for wood substrates were explored such as peracetic acid, ionic liquids, and deep eutectic solvents ( GP-4 , GP-5 , and GP-7 ) ( Miyafuji, 2015 ; Chen Z. et al, 2019 ; Montanari et al, 2020 ). When the purpose of delignification is to remove light-absorbing components, eco-friendly bleaching processes can be employed to remove chromophores while retaining most of the lignin ( Li et al, 2017a ).…”

Section: Green Aspects Of Wood Functionalizationmentioning

confidence: 99%

Sustainable Wood Nanotechnologies for Wood Composites Processed by In-Situ Polymerization

2021

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The development of large, multifunctional structures from sustainable wood nanomaterials is challenging. The need to improve mechanical performance, reduce moisture sensitivity, and add new functionalities, provides motivation for nanostructural tailoring. Although existing wood composites are commercially successful, materials development has not targeted nano-structural control of the wood cell wall, which could extend the property range. For sustainable development, non-toxic reactants, green chemistry and processing, lowered cumulative energy requirements, and lowered CO2-emissions are important targets. Here, modified wood substrates in the form of veneer are suggested as nanomaterial components for large, load-bearing structures. Examples include polymerization of bio-based monomers inside the cell wall, green chemistry wood modification, and addition of functional inorganic nanoparticles inside the cell wall. The perspective aims to describe bio-based polymers and green processing concepts for this purpose, along with wood nanoscience challenges.

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Interface tailoring by a versatile functionalization platform for nanostructured wood biocomposites

Abstract: Wood templates are promising biobased substrates that can be functionalized for controlled nanostructure, and the development of novel nanotechnologies. A sustainable, selective and versatile chemical functionalization platform for cellulosic wood...

Cited by 58 publications

References 84 publications

High Performance, Fully Bio‐Based, and Optically Transparent Wood Biocomposites

High Performance, Fully Bio‐Based, and Optically Transparent Wood Biocomposites

Review of Functional Treatments for Modified Wood

Sustainable Wood Nanotechnologies for Wood Composites Processed by In-Situ Polymerization

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