Heat bonding of wood with starch-lignin mixtures creates new recycling opportunities

Hellmayr, R.; Šernek, Milan; Myna, Roman; Reichenbach, Sara; Kromoser, Benjamin; Liebner, Falk; Wimmer, Rupert

doi:10.1016/j.mtsust.2022.100194

Cited by 6 publications

(4 citation statements)

References 38 publications

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“…When applying starch as wood adhesive, the biggest challenge is its water resistance. The results of blending starch and lignin show very good mechanical behaviour for wood bonding as well as full recyclability [7], while the hydrophilicity can be adjusted using different measures. Within in the bio-based binder lignosulfonate acts as a dispersant, whereas the use of starch ensures the strength development of the bond line.…”

Section: Materials Conceptmentioning

confidence: 99%

“…The images show the interaction between the two ingredients of the Biomix (Figure 8 (a)) and the dispersion of the binder within the saw dust when dry-blended (Figure 8 (b)). The tensile shear stress of Biomix was investigated in [7], and showed promising properties compared to urea formaldehyde, a conventional adhesive in wood industry. In order to make a statement on the resource-efficiency and the ecologic aspect of the newly developed material an LCA focussing solely on the material production (Figure 9) was conducted.…”

Section: Figure 7:dvs Measurement [5]mentioning

confidence: 99%

“…The newly presented 3DP Biowall construction concept combines the high environmental friendly potential of grown renewable raw material mainly coming from secondary streams (e.g. wood particles, lignosulfonate) including a completely new binding concept [5,7], which allows for a closed-loop process (Figure 1), with a new production strategy resulting in new truly resource-efficient construction method.…”

Section: Introduction 789mentioning

confidence: 99%

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3dp Biowall - Circular Economy in Wood Construction Through Additive Manufacturing of Fully Recycable Walls

Kromoser

Reichenbach

Myna

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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To further increase the environmental potential of renewable raw materials, a new construction concept for fully recyclable bio-based wall elements assembled by additive manufacturing, called 3DP Biowall, is presented. The proposed concept considers the entire life cycle from material converting, to manufacturing and application, over to recycling and restarting a new construction phase. With the help of this method the materials are kept significantly longer in a closed material cycle, with conceptually no waste production. A fully biobased material mixture of wood particles and Biomix (sodium lignosulfonate and starch) is used. The present paper describes the basic approach, first production experiments as well as the achieved mechanical performance within compression and flexural tests performed with first test specimens. Furthermore, the potential of the closed material loop approach is assessed through an LCA and by comparing the 3DP Biowall to other well-known exterior wall systems. All production life cycle phases were regarded and experimentally investigated. The successful production tests and the achieved mechanical characteristics prove the feasibility and potential of the new approach. The performed LCA points out further optimisation potential regarding the mixture with the starch component having a comparatively high impact at the environmental footprint of the material mixture.

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Section: Materials Conceptmentioning

confidence: 99%

Section: Figure 7:dvs Measurement [5]mentioning

confidence: 99%

Section: Introduction 789mentioning

confidence: 99%

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3dp Biowall - Circular Economy in Wood Construction Through Additive Manufacturing of Fully Recycable Walls

Kromoser

Reichenbach

Myna

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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“…To show that the presented concepts are possible selected preliminary tests (DVS measurements, compressive strength testing, fl exural strength testing, microscopic investigations, single fl ame source test) in combination with a Life Cycle Assessment -LCA (cradle-to-gate) were conducted (Hellmayr et al, 2022;Kromoser et al, 2022). The data derived from investigations prove the competitiveness of the material mix in regard to an application for wall elements and the potential of the closed material loop approach.…”

Section: Referencesmentioning

confidence: 99%

WoodRise 2022

2022

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Cellulose nanofibrils as a bio-based binder for wood fiber composite insulation panels with enhanced thermo-mechanical properties for structural wall sheathing applications

Hossain,

Tajvidi

2024

Carbohydrate Polymer Technologies and Applications

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Heat bonding of wood with starch-lignin mixtures creates new recycling opportunities

Cited by 6 publications

References 38 publications

3dp Biowall - Circular Economy in Wood Construction Through Additive Manufacturing of Fully Recycable Walls

3dp Biowall - Circular Economy in Wood Construction Through Additive Manufacturing of Fully Recycable Walls

WoodRise 2022

Cellulose nanofibrils as a bio-based binder for wood fiber composite insulation panels with enhanced thermo-mechanical properties for structural wall sheathing applications

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