One of the key steps towards a broader implementation of renewable materials is the development of biodegradable adhesives that can be attained at scale and utilized safely. Recently, cellulose nanocrystals (CNCs) were demonstrated to have remarkable adhesive properties. Herein, we study three classes of naturally synthesized biopolymers as adhesives, namely nanocelluloses (CNFs), cellulose derivatives, and proteins by themselves and when used as additives with CNCs. Among the samples evaluated, the adhesion strength was the highest for bovine serum albumin and hydroxypropyl cellulose (beyond 10 MPa). These were followed by carboxymethylcellulose and CNCs (ca. 5 MPa) and mechanically fibrillated CNFs (ca. 2 MPa), and finally by tempo-oxidized CNFs (0.2 MPa) and lysozyme (1.5 MPa). Remarkably, we find that the anisotropy of adhesion (in plane vs out of plane) falls within a narrow range across the bio-based adhesives studied. Collectively, this study benchmarks bio-based non-covalent adhesives aiming towards their improvement and implementation.
SormenjälkiSukella tutkimusaiheisiin 'Benchmarking supramolecular adhesive behavior of nanocelluloses, cellulose derivatives and proteins'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.
- 1 Aktiivinen
BioELCell: Bioproducts Engineered from Lignocelluloses: from plants and upcycling to next generation materials
Rojas Gaona, O., Abidnejad, R., Ajdary, R., Johansson, L., Ressouche, E., Majoinen, J., Robertson, D., Reyes Torres, G., Garcia Greca, L., Klockars, K., Bhattarai, M., Dufau Mattos, B., Tardy, B., Kämäräinen, T., Zhu, Y. & Zhao, B.
30/07/2018 → 31/07/2023
Projekti: EU: ERC grants