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

Park, Ji-Soo; Park, Chanwoo; Han, Sang‐Ik; Lee, Eun-Ah; Cindradewi, Azelia Wulan; Kim, Jeong-Ki; Kwon, Gu-Joong; Seo, Youngkyun; Yoo, Won-Jae; Gwon, Jaegyoung; Lee, Seung Hwan

doi:10.3390/polym13111709

Cited by 16 publications

(5 citation statements)

References 23 publications

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“…The viscosity of the solution was decreased at a lower shear rate; however, it was starting to be constant at the higher shear rate. A similar trend was also shown in research conducted by Park et al, 2021, where CNF was added into alginate (AL) [ 36 ]. This happened because with increasing shear rate, the polymer molecules start to untangle from each other and start to align them in the direction of flow, resulting in a decrease in viscosity.…”

Section: Resultssupporting

confidence: 82%

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Preparation and Characterization of Cellulose Acetate Film Reinforced with Cellulose Nanofibril

et al. 2021

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In this study, cellulose acetate (CA)/cellulose nanofibril (CNF) film was prepared via solvent casting. CNF was used as reinforcement to increase tensile properties of CA film. CNF ratio was varied into 3, 5, and 10 phr (parts per hundred rubbers). Triacetin (TA) and triethyl citrate (TC) were used as two different eco-friendly plasticizers. Two different types of solvent, which are acetone and N-methyl-2-pyrrolidone (NMP), were also used. CA/CNF film was prepared by mixing CA and CNF in acetone or NMP with 10% concentration and stirred for 24 h. Then, the solution was cast in a polytetrafluoroethylene (PTFE) dish followed by solvent evaporation for 12 h at room temperature for acetone and 24 h at 80 °C in an oven dryer for NMP. The effect of solvent type, plasticizers type, and CNF amount on film properties was studied. Good dispersion in NMP was evident from the morphological study of fractured surface and visible light transmittance. The results showed that CNF has a better dispersion in NMP which leads to a significant increase in tensile strength and elastic modulus up to 38% and 65%, respectively, compared with those of neat CA. CNF addition up to 5 phr loading increased the mechanical properties of the film composites.

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Section: Resultssupporting

confidence: 82%

“…Polymers 2021, 13, x FOR PEER REVIEW shear rate. A similar trend was also shown in research conducted by Park e where CNF was added into alginate (AL) [36]. This happened because with shear rate, the polymer molecules start to untangle from each other and sta them in the direction of flow, resulting in a decrease in viscosity.…”

Section: Viscositysupporting

confidence: 75%

Preparation and Characterization of Cellulose Acetate Film Reinforced with Cellulose Nanofibril

et al. 2021

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“…With increasing AL content in CNC suspension at the same spinning rate, the diameter tended to decrease, but the surface morphology became coarse. The decrease in the diameter might be due to the great compatibility and attractive forces between the two hydrophilic biopolymers and similar behavior was also observed with CNF in our previous study (Park et al 2021). Because of this decrease in diameter, the rodlike CNC structures will appear prominently and make the coarse surface.…”

Section: Morphological Characteristics Of Cnc/al Microcomposite Filam...supporting

confidence: 82%

Preparation and properties of wet-spun microcomposite filaments from cellulose nanocrystals and alginate using a microfluidic device

Park

Han

et al. 2021

BioRes

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Cellulose nanocrystals (CNCs) were wet-spun in a coagulation bath for the fabrication of microfilaments, and the effect of sodium alginate (AL) addition on the wet-spinnability and properties of the microcomposite filament was investigated. The CNC suspension exhibited excellent wet-spinnability in calcium chloride (CaCl2) solution, and the addition of AL in CNC suspension resulted in the enhancement of the wet-spinnability of CNCs. As the AL content increased from 3% to 10%, the average diameter of the microcomposite filament decreased, and its tensile properties deteriorated. The increased spinning rate caused an increase in the orientation index of CNCs, resulting in an improvement in the tensile properties of the microcomposite filament.

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“…In the previous study, wet-spun LCNF filaments had tensile strength in the range of 80–150 MPa, which is much stronger than LCNF/AL composite filaments. Since AL fiber has a low tensile strength of about 20 MPa [ 37 ], AL addition can deteriorate the strength of filaments. Elongation at break of the wet-spun composite filament was in the range of 1–4%, which increased with the increase in the content of AL.…”

Section: Resultsmentioning

confidence: 99%

Wet-Spun Composite Filaments from Lignocellulose Nanofibrils/Alginate and Their Physico-Mechanical Properties

et al. 2021

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Lignocellulose nanofibrils (LCNFs) with different lignin contents were prepared using choline chloride (ChCl)/lactic acid (LA), deep eutectic solvent (DES) pretreatment, and subsequent mechanical defibrillation. The LCNFs had a diameter of 15.3–18.2 nm, which was similar to the diameter of commercial pure cellulose nanofibrils (PCNFs). The LCNFs and PCNFs were wet-spun in CaCl2 solution for filament fabrication. The addition of sodium alginate (AL) significantly improved the wet-spinnability of the LCNFs. As the AL content increased, the average diameter of the composite filaments increased, and the orientation index decreased. The increase in AL content improved the wet-spinnability of CNFs but deteriorated the tensile properties. The increase in the spinning rate resulted in an increase in the orientation index, which improved the tensile strength and elastic modulus.

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

Cited by 16 publications

References 23 publications

Preparation and Characterization of Cellulose Acetate Film Reinforced with Cellulose Nanofibril

Preparation and Characterization of Cellulose Acetate Film Reinforced with Cellulose Nanofibril

Preparation and properties of wet-spun microcomposite filaments from cellulose nanocrystals and alginate using a microfluidic device

Wet-Spun Composite Filaments from Lignocellulose Nanofibrils/Alginate and Their Physico-Mechanical Properties

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