Projects per year
Abstract
For developing novel fully biological materials, a central question is how we can utilize natural components in combination with biomimetic strategies in ways that both allow feasible processing and high performance. Within this development, adhesives play a central role. Here, we have combined two of nature's excellent materials, silk and cellulose, to function as an adhesive system. As an initial step in processing, wood was delignified. Without lignin, the essential microstructure and alignment of the wood remain, giving a strong scaffold that is versatile to process further. A recombinant spider silk protein was used as a fully biological and water-based adhesive. The adhesive strength was excellent with an average value of 6.7 MPa, with a maximum value of up to 10 MPa. Samples of different strengths showed characteristic features, with high tear-outs for weaker samples and only little tear-out for strong samples. As references, bovine serum albumin and starch were used. Based on the combined data, we propose an overall model for the system and highlight how multiple variables affect performance. Adhesives, in particular, biobased ones, must be developed to be compatible with the overall adherend system for suitable infiltration and so that their mechanical properties match the adherend. The engineering of proteins gives an unmatched potential for designing adhesive systems that additionally have desired properties such as being fully water-based, biologically produced, and renewable.
Original language | English |
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Pages (from-to) | 552–561 |
Number of pages | 10 |
Journal | ACS Sustainable Chemistry and Engineering |
Volume | 10 |
Issue number | 1 |
Early online date | 22 Dec 2021 |
DOIs | |
Publication status | Published - 10 Jan 2022 |
MoE publication type | A1 Journal article-refereed |
Keywords
- adhesion
- amino acid analysis
- Araneus diadematus
- bovine serum albumin
- cellulose
- cellulose-binding domain
- lap shear strength
- protein engineering
Fingerprint
Dive into the research topics of 'Recombinant Spider Silk Protein and Delignified Wood Form a Strong Adhesive System'. Together they form a unique fingerprint.Projects
- 5 Finished
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CrossSilk: Durable and functional biomaterials from crosslinked non-canonical silk and cellulose composite
Aranko, S. (Principal investigator)
01/09/2020 → 31/08/2024
Project: Academy of Finland: Other research funding
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A novel material concept for high strength cellulose composites
Linder, M. (Principal investigator)
01/01/2019 → 31/12/2021
Project: Academy of Finland: Other research funding
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Biomimetic Adhesives
Linder, M. (Principal investigator)
01/09/2018 → 31/08/2022
Project: Academy of Finland: Other research funding
Equipment
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Bioeconomy Research Infrastructure
Seppälä, J. (Manager)
School of Chemical EngineeringFacility/equipment: Facility
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OtaNano - Nanomicroscopy Center
Seitsonen, J. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility