Effects of minerals on cellulose dissolution in ionic liquids and solution spinnability for IONCELL-F textile fibre production

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.advisorSchlapp-Hackl, Inge
dc.contributor.authorHou, Dandan
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.supervisorSixta, Herbert
dc.date.accessioned2020-08-23T17:05:16Z
dc.date.available2020-08-23T17:05:16Z
dc.date.issued2020-08-18
dc.description.abstractIn the Ioncell® process, fibers are generated from an ionic liquid – cellulose solution via the dry-jet-wet fiber spinning technique. The ionic liquid is washed into the coagulation bath during the fiber regeneration step. Consequently, the removed solvent can be collected, recycled and further reused. [DBNH][OAc] has been approved as a suitable chemical compound for cellulose dissolution in the Ioncell® process (Michud et al., 2016). However, some traces of inorganic cations, such as K+, Ca2+ and Na+ are also dissolved by the ionic liquid. The inorganic salts get more concentrated by increasing of the recycling cycles during the recovery process of the ionic liquid (Parviainen et al., 2015). The presence of inorganic salts might affect the dissolution behavior or even more inhibit the formation of a [DBNH][OAc] - cellulose solution. My thesis focuses on the determination of the solubility of minerals in [DBNH][OAc] and how these mineral impurities influence the production of fibers by the Ioncell® process. Thereby, the solubility of the cations K+ and Na+ is quantitatively determined by Atomic Absorption Spectroscopy. Moreover, different mineral – [DBNH][OAc] – cellulose solutions have been produced and the effect of the K+, Na+ and Ca2+ cations on the spinnability has been investigated. The properties of the produced fibers have been tested and compared with the characteristics of standard fibers, which had been spun from a [DBNH][OAc] – cellulose solution without any additives.en
dc.format.extent53
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/46014
dc.identifier.urnURN:NBN:fi:aalto-202008234946
dc.language.isoenen
dc.locationPKfi
dc.programmeMaster's Programme in Chemical, Biochemical and Materials Engineeringfi
dc.programme.majorChemistryfi
dc.programme.mcodeCHEM3023fi
dc.subject.keywordionic liquiden
dc.subject.keywordsolubilityen
dc.subject.keywordIoncell-Fen
dc.subject.keywordman-made fibersen
dc.titleEffects of minerals on cellulose dissolution in ionic liquids and solution spinnability for IONCELL-F textile fibre productionen
dc.typeG2 Pro gradu, diplomityöfi
dc.type.ontasotMaster's thesisen
dc.type.ontasotDiplomityöfi
local.aalto.electroniconlyyes
local.aalto.openaccessno
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[dipl] Kemian tekniikan korkeakoulu / CHEM