abstract
The increasing demand for cellulosic fibres is continuously driven by the growing earth population and requirements of the textile industry. The annual cotton production of ca. 25 million tons is no longer enough to meet the market demands. This market gap of cellulosic fibres is progressively filled by regenerated cellulosic fibres derived from the dissolving pulp. The conventional industrial process of viscose production is far from being environmentally friendly due to the use of hazardous reagents. Alternatively, new trends in the production of regenerated fibres are related to the direct dissolution of cellulose in appropriate environmentally sound recyclable solvents, allowing high quality rayon fibres. This article reviews the sources of dissolving pulps used for the production of viscose and its quality parameters related to the performance of viscose production. The prospective cellulose regeneration processes, both commercialized and under development, are reviewed regarding current and future developments in the area.
keywords
DEEP EUTECTIC SOLVENTS; BAMBOO DISSOLVING PULP; IONIC LIQUIDS; LIGNOCELLULOSIC BIOMASS; DIMETHYL-SULFOXIDE; COTTON WASTE; IONCELL-F; MANUFACTURING PROCESSES; THERMAL-STABILITY; VISCOSITY CONTROL
subject category
Chemistry, Applied; Chemistry, Organic; Polymer Science
authors
Mendes, ISF; Prates, A; Evtuguin, DV
our authors
Dmitry Evtyugin
Associate Professor with AggregationProjects
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
acknowledgements
The financial support of this work by Caima - Industria de Celulose S. A. within the scope of the PhD project of Ines S. F. Mendes and by CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES, are greatly acknowl-edged. Authors also acknowledge the project no POCI-01-0247-FEDER-046948 (Fiber4Fiber - Dissolving Eucalyptus Globulus Wood Pulp for New Processed Cellulosic Fibers) , funded under Portuguese Incentives System to Technological R&D in the scope of Portugal 2020, through the Operational Program for Competitiveness and Internationalization (COMPETE) and the European Regional Development Fund (ERDF) .