Preparation and Properties of Wet-Spun Microcomposite Filaments from Various CNFs and Alginate

Authors :: Jeong-Ki Kim
Seung-Hwan Lee
Won-Jae Yoo
Jaegyoung Gwon
Gu-Joong Kwon
Eun-Ah Lee
Ji-Soo Park
Song-Yi Han
Chan-Woo Park
Young Ho Seo
Azelia Wulan Cindradewi
Source :: Polymers, Vol 13, Iss 1709, p 1709 (2021), Polymers, Volume 13, Issue 11
Publication Year :: 2021
Publisher :: MDPI AG, 2021.
Abstract: We aimed to improve the mechanical properties of alginate fibers by reinforcing with various cellulose nanofibrils (CNFs). Pure cellulose nanofibril (PCNF), lignocellulose nanofibril (LCNF) obtained via deep eutectic solvent (DES) pretreatment, and TEMPO-oxidized lignocellulose nanofibril (TOLCNF) were employed. Sodium alginate (AL) was mixed with PCNF, LCNF, and TOLCNF with a CNF content of 5–30%. To fabricate microcomposite filaments, the suspensions were wet-spun in calcium chloride (CaCl2) solution through a microfluidic channel. Average diameters of the microcomposite filaments were in the range of 40.2–73.7 μm, which increased with increasing CNF content and spinning rate. The tensile strength and elastic modulus improved as the CNF content increased to 10%, but the addition of 30% CNF deteriorated the tensile properties. The tensile strength and elastic modulus were in the order of LCNF/AL &gt<br />PCNF/AL &gt<br />TOLCNF/AL &gt<br />AL. An increase in the spinning rate improved the tensile properties.

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