Absorbent Filaments from Cellulose Nanofibril Hydrogels through Continuous Coaxial Wet Spinning

ACS Applied Materials & Interfaces
Meri LundahlOrlando J Rojas

Abstract

A continuous and scalable method for the wet spinning of cellulose nanofibrils (CNFs) is introduced in a core/shell configuration. Control on the interfacial interactions was possible by the choice of the shell material and coagulant, as demonstrated here with guar gum (GG) and cellulose acetate (CA). Upon coagulation in acetone, ethanol, or water, GG and CA formed supporting polymer shells that interacted to different degrees with the CNF core. Coagulation rate was shown to markedly influence the CNF orientation in the filament and, as a result, its mechanical strength. The fastest coagulation noted for the CNF/GG core/shell system in acetone led to an orientation index of ∼0.55 (Herman's orientation parameter of 0.40), Young's modulus of ∼2.1 GPa, a tensile strength of ∼70 MPa, and a tenacity of ∼8 cN/tex. The system that underwent the slowest coagulation rate (CNF/GG in ethanol) displayed a limited CNF orientation but achieved an intermediate level of mechanical resistance, owing to the strong core/shell interfacial affinity. By using CA as the supporting shell, it was possible to spin CNF into filaments with high water absorption capacity (43 g water/g dry filament). This was explained by the fact that water (used as the co...Continue Reading

References

Feb 10, 2011·Biomacromolecules·Shinichiro IwamotoTadahisa Iwata
Jan 11, 2012·Biomacromolecules·Mehdi PakravanAbdellah Ajji
Jun 3, 2014·Nature Communications·Karl M O HåkanssonL Daniel Söderberg
May 29, 2015·ACS Applied Materials & Interfaces·Saleh HooshmandKristiina Oksman
Jan 4, 2017·ACS Applied Materials & Interfaces·Jingjing YaoHuaping Wang
Sep 21, 2017·Scientific Reports·Pezhman MohammadiMarkus B Linder

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Citations

Aug 25, 2020·Advanced Materials·Tomas RosénL Daniel Söderberg
Aug 25, 2020·Carbohydrate Polymers·Elina Niinivaara, Emily D Cranston
May 6, 2021·Macromolecular Bioscience·Matin RostamitabarSamaneh Ghazanfari
Jan 8, 2019·Biomacromolecules·Felix RiehleAndreas Walther
Apr 2, 2019·ACS Sustainable Chemistry & Engineering·Ling WangOrlando J Rojas

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Methods Mentioned

BETA
X-ray
chemical modification

Software Mentioned

XRD2DScan

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