Department of Bioproducts and Biosystems

Bio2Future course "Man-made cellulose fibers"

Man-made cellulose fibers (8 ECTS) will be organized on 19-23 August 2019. The course offers students the opportunity to develop a good knowledge of the fundamentals and practice of man-made cellulose fiber (MMCF) production. The content of the individual lectures is aligned along the value chain of the textile production.
Jenni Haukio,spouse of Finnish President,Sauli Niinistö, wearing an Aalto University-created evening gownmade with birch-based Ioncell fibre from Finland’s plentiful forests(on the left), Resaerch work_Puu19
First lady Jenni Haukio wearing an evening gown made of MMCFs using Ioncell technology on the Finnish Independence Day reception (left, Photo: Vesa Moilanen/Lehtikuva). Lab-Scale production of the man-made fibres (right; Photo: Mikko Raskinen).

After a short introduction about the history and the market situation of MMCFs, the focus is placed on the chemistry and technology of the dissolving pulp (raw material) and staple fiber production based on the two major commercial process, the Viscose and the Lyocell processes. In addition, students will get an overview on alternative MMCF processes.

The course provides the fundamentals of cellulose dissolution, characterization of rheological and viscoelastic behavior, the dynamics of polymer chains in solution, structure formation during the regeneration of cellulose fibers. Students can expect to gain a better understanding of cellulose structure and morphology, with a special emphasis on the structure-property-relationship.

The conversion of staple fibers to products that go into making apparel and other textile goods is subject of the final part of the course. Students will learn yarn production, knitting and knitwear, weaving, dyeing and printing technologies, fabric quality and sustainability and gain an outlook on new fabric developments including smart textiles. The dyeing and finishing fundamentals encompass the basic concepts of textile wet processing with emphasis on the tuning of the surface properties with respect to hydrophilicity and hydrophobicity.

Sustainable textile fibers
Man-made cellulosic fibers made from newsprint waste (Photo: Eeva Suorlahti).
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