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https://hdl.handle.net/10316/109749
Title: | Cellulose Dissolution in an Alkali Based Solvent: Influence of Additives and Pretreatments | Authors: | Kihlman, Martin Medronho, Bruno F. Romano, Anabela L. Germgård, Ulf Lindman, Björn Olof |
Keywords: | cellulose dissolution; hydrophobic effect; sodium hydroxide; pretreatment amphiphiles | Issue Date: | 2013 | Publisher: | Sociedade Brasileira de Quimica | Project: | FCT, SFRH/BPD/74540/2010 CelluNova I project |
Serial title, monograph or event: | Journal of the Brazilian Chemical Society | Volume: | 24 | Issue: | 2 | Abstract: | The distinction between thermodynamic and kinetics in cellulose dissolution is seldom
considered in the literature. Therefore, herein an attempt to discuss this topic and illustrate our
hypotheses on the basis of simple experiments was made. It is well-known that cellulose can be
dissolved in a aqueous sodium hydroxide (NaOH/H2O) solvent at low temperature but it is here
shown that such an alkaline solvent can be considerably improved regarding solubility, stability and
rheological properties as a whole if different additives (salts and amphiphilic molecules) are
used in the dissolution stage. This work probes new aqueous routes to dissolve cellulose, thereby
improving the potential to commercially dissolve cellulose in an inexpensive and environmentally
friendly manner. A distinção entre termodinâmica e cinética de dissolução da celulose raramente tem sido considerada na literatura. Neste trabalho, discutimos este tema e fundamentamos as nossas hipóteses recorrendo a experiências simples. É do conhecimento geral que a celulose pode ser dissolvida no solvente aquoso de hidróxido de sódio (NaOH/H2O) a baixa temperatura. Neste trabalho, demonstramos que este solvente alcalino pode ser consideravelmente melhorado em relação à sua estabilidade, solubilidade e propriedades reológicas se forem usados diferentes aditivos (sais e moléculas anfifílicas) na fase de dissolução. Este trabalho indica novos caminhos relativamente à dissolução da celulose em solventes aquosos, de uma forma mais econômica e ambientalmente amigável, aumentando o seu potencial comercial. |
URI: | https://hdl.handle.net/10316/109749 | ISSN: | 0103-5053 | DOI: | 10.5935/0103-5053.20130038 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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File | Description | Size | Format | |
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Cellulose dissolution in an alkali based solvent Influence of additives and pretreatments.pdf | 1.23 MB | Adobe PDF | View/Open |
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