Upcycling of cotton polyester blended textile waste to new man-made cellulose fibers
Research output: Contribution to journal › Article
- VTT Technical Research Centre of Finland
The creation of a circular economy for cellulose based textile waste is supported by the development of an upcycling method for cotton polyester blended waste garments. We present a separation procedure for cotton and polyester using [DBNH] [OAc], a superbase based ionic liquid, which allows the selective dissolution of the cellulose component. After the removal of PET, the resulting solution could be employed to dry-jet wet spin textile grade cellulose fibers down to the microfiber range (0.75–2.95 dtex) with breaking tenacities (27–48 cN/tex) and elongations (7–9%) comparable to commercial Lyocell fibers made from high-purity dissolving pulp. The treatment time in [DBNH] [OAc] was found to reduce the tensile properties (<52%) and the molar mass distribution (<51%) of PET under certain processing conditions.
|Number of pages||9|
|Publication status||Published - 1 Sep 2019|
|MoE publication type||A1 Journal article-refereed|
- Cellulose PET separation, Dry-jet wet spinning, Ioncell, Ionic liquid, Polyethylene terephthalate, Textile recycling