J.A. Sirviö, M. Visanko, N.C. Hildebrandt, Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent, In European Polymer Journal, Volume 97, 2017, Pages 292-298, ISSN 0014-3057, https://doi.org/10.1016/j.eurpolymj.2017.10.021. (http://www.sciencedirect.com/science/article/pii/S0014305717313745) Keywords: Cellulose dissolution; Tetraalkylammonium hydroxide; All-cellulose composite; Mechanical properties
Rapid preparation of all-cellulose composites by solvent welding based on the use of aqueous solvent
|Author:||Sirviö, J.A.1; Visanko, M.1; Hildebrandt, N.C.1,2|
1Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
2Baden-Wuerttemberg Cooperative State University, Erzbergerstraße 121, 76133 Karlsruhe, Germany
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2017111450693
|Publish Date:|| 2019-10-16
In the present study, the dissolution of softwood fibers and fabrication of all-cellulose composites was investigated using aqueous tetraethylammonium hydroxide solution (TEAOH, 35 wt%) at room temperature. The bulk of the cellulose fibers were instantly dissolved when mixed with the solvent, and suspensions up to 3 wt% were fabricated with ease. During the dissolution, a few remaining larger fiber flocks were fully dissolved within 3 h of mixing at room temperature. TEAOH was further studied in the production of all-cellulose composites by solvent welding (partial dissolution) of cellulose fiber sheets. Tensile strength of the original cellulose sheet increased from 3.3 to 55.0 MPa only after 30 s of room-temperature solvent welding, and an increase of over 23-fold (up to 76.7 MPa) was obtained by high-pressure-aided hot-pressing of the partially dissolved sheets before drying. The demonstrated fabrication of all-cellulose composites yielded many benefits in comparison to the current dissolution systems, such as short treatment time, ambient operation conditions, and readily applicable processing solutions, which makes it a potential methodology applicable even at an industrial scale.
European polymer journal
|Pages:||292 - 298|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
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