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Tuning the properties of regenerated cellulose: Effects of polarity and water solubility of the coagulation medium
Mid Sweden University, Sweden; Nouryon Pulp and Performance Chemicals AB, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health.
Nouryon Pulp and Performance Chemicals AB, Sweden.
Mid Sweden University, Sweden; University of Algarve, Portugal.
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2020 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 236, article id 116068Article in journal (Refereed) Published
Abstract [en]

In this study, the effect of different alcohols and esters as a coagulation medium in the regeneration of cellulose dissolved in an aqueous LiOH-urea-based solvent was thoroughly investigated using various methods such as solid state NMR, X-ray diffraction, water contact angle, oxygen gas permeability, mechanical testing, and scanning electron microscopy. It was observed that several material properties of the regenerated cellulose films follow trends that correlate to the degree of cellulose II crystallinity, which is determined to be set by the miscibility of the coagulant medium (nonsolvent) and the aqueous alkali cellulose solvent rather than the nonsolvents’ polarity. This article provides an insight, thus creating a possibility to carefully tune and control the cellulose material properties when tailor-made for different applications.

Place, publisher, year, edition, pages
Elsevier Ltd , 2020. Vol. 236, article id 116068
Keywords [en]
Cellulose, Coagulation medium, Crystallinity, Polarity, Regeneration, Coagulation, Contact angle, Dissolved oxygen, Gas permeability, Lithium compounds, Mechanical testing, Nuclear magnetic resonance spectroscopy, Scanning electron microscopy, Solubility, Urea, Cellulose solvent, Regenerated cellulose, Regenerated cellulose films, Solid state NMR, Water contact angle, Water solubilities, Cellulose films
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-44446DOI: 10.1016/j.carbpol.2020.116068Scopus ID: 2-s2.0-85080088394OAI: oai:DiVA.org:ri-44446DiVA, id: diva2:1415123
Note

Funding text 1: The authors are grateful for the financial support from the KK Foundation (Sweden) and Nouryon (Sweden) . We would like to thank Nouryon Stockvik for the thermogravimetric analysis, SCA Sundsvall for allowing us to use contact angle measurement instrument and tensile testing instrument, and Aditya Birla Domsjö for providing the dissolving pulp cellulose. We express our gratitude for the helpful discussions with Björn Lindman regarding this work.

Available from: 2020-03-17 Created: 2020-03-17 Last updated: 2020-03-17Bibliographically approved

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