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Coagulation using organic carbonates opens up a sustainable route towards regenerated cellulose films
Authors
Victoria Aladin
Ingo Barke
+8 more
Björn Corzilius
Marcus Frank
Dirk Hollmann
Udo Kragl
Regina Lange
Henrik Lund
Mai N. Nguyen
Armin Springer
Publication date
1 January 2020
Publisher
[London] : Macmillan Publishers Limited, part of Springer Nature
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Cite
Abstract
Due to their biodegradability, biocompatibility and sustainable nature, regenerated cellulose (RC) films are of enormous relevance for green applications including medicinal, environmental and separation technologies. However, the processes used so far are very hazardous to the environment and health. Here, we disclose a simple, fast, environmentally friendly, nontoxic and cost-effective processing method for preparing RC films. High quality non-transparent and transparent RC films and powders can be produced by dissolution with tetrabutylphosphonium hydroxide [TBPH]/[TBP]+[OH]− followed by coagulation with organic carbonates. Investigations on the coagulation mechanism revealed an extremely fast reaction between the carbonates and the hydroxide ions. The high-quality powders and films were fully characterized with respect to structure, surface morphology, permeation and selectivity. This method represents a future-oriented green alternative to known industrial processes. © 2020, The Author(s)
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Last time updated on 23/07/2022