Benchmarking supramolecular adhesive behavior of nanocelluloses, cellulose derivatives and proteins
Abstract
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. Show more
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https://doi.org/10.3929/ethz-b-000554169Publication status
publishedExternal links
Journal / series
Carbohydrate PolymersVolume
Pages / Article No.
Publisher
ElsevierSubject
Natural polymers; Biopolymers; Cellulose; Carbohydrate; Nanocellulose; Nanocrystal; Cellulose derivativesMore
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