Productions of IONCELL® cellulose-lignin hybrid fibers from hardwood and softwood
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Journal Title
Journal ISSN
Volume Title
Kemian tekniikan korkeakoulu |
Master's thesis
Authors
Date
2024-08-29
Department
Major/Subject
Biological and Chemical Engineering for a Sustainable Bioeconomy
Mcode
Degree programme
Master's Programme in Biological and Chemical Engineering for a Sustainable Bioeconomy
Language
en
Pages
49+8
Series
Abstract
The textile industry is in dire need of change in terms of sustainability. This thesis work examines textiles derived from the two most abundant biopolymers, cellulose and lignin derived from wood. In this study, two types of commercial paper pulps, hardwood and softwood, and their respective kraft lignins are utilised to produce fibers through the Ioncell® process. The research investigates the impact of integrating lignin into cellulose fibers and explores how the source of the pulp and lignin affects the final product. Equal amounts of cellulose and lignin from different sources were spun and analysed for mechanical testing and thermal properties. It was found that hybrid fibers with the same pulp but different lignins exhibit distinct rheological and tensile properties, further highlighting the effect of lignin from different sources. Additionally, varying lignin concentrations revealed that cellulose is responsible for the tensile strength of the fiber, whereas lignin served as a filler. The properties of the hybrid fibers are comparable to those of cotton, making them a potential sustainable alternative. On the other hand, softwood pulp and lignin hybrid fibers are suitable for carbon fiber production due to their high residue amount and thermal stability.Description
Supervisor
Hummel, MichaelThesis advisor
Sixta, HerbertCho, Mijung
Keywords
Ioncell®, cellulose-lignin fibers, ionic liquid, textile fibers