High velocity dry spinning of nanofibrillated cellulose (CNF) filaments on an adhesion controlled surface with low friction

Yingfeng Shen, Hannes Orelma (Corresponding Author), Asko Sneck, Kirsi Kataja, Juha Salmela, Pia Qvintus, Anna Suurnäkki, Ali Harlin

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15 Citations (Scopus)

Abstract

A new process for preparing thin cellulose nanofibril (CNF) filaments (thickness of 16 µm) was investigated by utilizing the dry spinning approach. In the process, CNF hydrogel was extruded through a fine nozzle onto an adhesion controlled capstan (drum) with low friction (slippery surface) at a speed of up to 11 m/s. The utilized capstan enables excellent line speed control when the slippery surface is applied, and prevents drying shrinkage of the spun filaments. The mechanical properties of prepared filaments can be optimized with the stretch ratio, the ratio of the speed of the drum surface, and the CNF jet flow. The developed method allows for manufacturing thin CNF filaments with an elevated spinning rate in a more controlled manner.
Original languageEnglish
Pages (from-to)3393-3398
JournalCellulose
Volume23
Issue number6
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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Keywords

  • CNF
  • dry-spinning
  • filament
  • SEM
  • spinning
  • tensile strength

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