Insights into structure and properties of cellulose nanofibrils (CNFs) prepared by screw extrusion and deep eutectic solvent permeation

ABSTRACTCellulose nanofibrils have been evaluated as reinforcement material in polymeric matrixes due to their potential to improve the mechanical, optical, and dielectric properties of these matrixes as well as its environmental positive footprint. This work describes how banana nanocellulose can be used to replace others not so friendly materials in many applications including, biomaterials, automotive industries and packaging by proved with their mechanical properties. The process used is very mild to the environment and consists of a high pressure fibrillation followed by a chemical purification which affects the fiber morphology. Many fibers characterization processes were used including microscopy techniques and X-ray diffraction to study the structure and properties of the prepared nanofibers and composites. Microscopy studies showed that the used individualization processes lead to a unique morphology of interconnected web-like structure of the fibers.

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Anionically Stabilized Cellulose Nanofibrils through Succinylation Pretreatment in Urea-Lithium Chloride Deep Eutectic Solvent

ChemSusChem ◽

10.1002/cssc.201600903 ◽

2016 ◽

Vol 9 (21) ◽

pp. 3074-3083 ◽

Cited By ~ 38

Author(s):

Tuula Selkälä ◽

Juho Antti Sirviö ◽

Gabriela S. Lorite ◽

Henrikki Liimatainen

Keyword(s):

Lithium Chloride ◽

Cellulose Nanofibrils ◽

Deep Eutectic Solvent

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One-step processing of plasticized starch/cellulose nanofibrils nanocomposites via twin-screw extrusion of starch and cellulose fibers

Carbohydrate Polymers ◽

10.1016/j.carbpol.2019.115554 ◽

2020 ◽

Vol 229 ◽

pp. 115554 ◽

Cited By ~ 2

Author(s):

Yesmine Fourati ◽

Albert Magnin ◽

Jean-Luc Putaux ◽

Sami Boufi

Keyword(s):

Cellulose Nanofibrils ◽

Cellulose Fibers ◽

Twin Screw Extrusion ◽

Screw Extrusion ◽

Twin Screw ◽

One Step ◽

Plasticized Starch

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Facile Preparation and Characteristic Analysis of Sulfated Cellulose Nanofibril via the Pretreatment of Sulfamic Acid-Glycerol Based Deep Eutectic Solvents

Nanomaterials ◽

10.3390/nano11112778 ◽

2021 ◽

Vol 11 (11) ◽

pp. 2778

Author(s):

Weidong Li ◽

Yu Xue ◽

Ming He ◽

Jiaqiang Yan ◽

Lucian A. Lucia ◽

...

Keyword(s):

Cellulose Nanofibrils ◽

Deep Eutectic Solvent ◽

Sulfamic Acid ◽

Deep Eutectic Solvents ◽

Uv Resistance ◽

Cellulose Nanofibril ◽

Characteristic Analysis ◽

Maximum Reduction ◽

High Degree ◽

Original Crystal

A deep eutectic solvent (DES) composed of sulfamic acid and glycerol allowed for the sustainable preparation of cellulose nanofibrils (CNF) with simultaneous sulfation. The reaction time and the levels of sulfamic acid demonstrated that fibers could be swelled and sulfated simultaneously by a sulfamic acid-glycerol-based DES and swelling also promoted sulfation with a high degree of substitution (0.12). The DES-pretreated fibers were further nanofibrillated by a grinder producing CNF with diameters from 10 nm to 25 nm. The crystallinity ranged from 53–62%, and CNF maintained the original crystal structure. DES pretreatment facilitated cellulose nano-fibrillation and reduced the energy consumption with a maximum reduction of 35%. The films prepared from polyvinyl alcohol (PVA) and CNF showed good UV resistance ability and mechanical properties. This facile and efficient method provided a more sustainable strategy for the swelling, functionalization and nano-fibrillation of cellulose, expanding its application to UV-blocking materials and related fields.

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

Polymers ◽

10.3390/polym13172974 ◽

2021 ◽

Vol 13 (17) ◽

pp. 2974

Author(s):

Ji-Soo Park ◽

Song-Yi Han ◽

Rajkumar Bandi ◽

Eun-Ah Lee ◽

Azelia-Wulan Cindradewi ◽

...

Keyword(s):

Mechanical Properties ◽

Choline Chloride ◽

Cellulose Nanofibrils ◽

Deep Eutectic Solvent ◽

Average Diameter ◽

Al Content ◽

Pure Cellulose ◽

Orientation Index ◽

Lignocellulose Nanofibrils ◽

Cacl2 Solution

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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Cellulose nanofibrils prepared by twin-screw extrusion: Effect of the fiber pretreatment on the fibrillation efficiency

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.116342 ◽

2020 ◽

Vol 240 ◽

pp. 116342 ◽

Cited By ~ 1

Author(s):

Khadija Trigui ◽

Clément De Loubens ◽

Albert Magnin ◽

Jean-Luc Putaux ◽

Sami Boufi

Keyword(s):

Cellulose Nanofibrils ◽

Twin Screw Extrusion ◽

Screw Extrusion ◽

Twin Screw

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Biodegradable Poly(vinyl alcohol) Foams Supported by Cellulose Nanofibrils: Processing, Structure, and Properties

Langmuir ◽

10.1021/la502723d ◽

2014 ◽

Vol 30 (31) ◽

pp. 9544-9550 ◽

Cited By ~ 40

Author(s):

Dagang Liu ◽

Zhongshi Ma ◽

Zhengmei Wang ◽

Huafeng Tian ◽

Mingyue Gu

Keyword(s):

Vinyl Alcohol ◽

Cellulose Nanofibrils ◽

Poly Vinyl Alcohol ◽

Structure And Properties ◽

Biodegradable Poly

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

Polymers ◽

10.3390/polym13111709 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1709

Author(s):

Ji-Soo Park ◽

Chan-Woo Park ◽

Song-Yi Han ◽

Eun-Ah Lee ◽

Azelia Wulan Cindradewi ◽

...

Keyword(s):

Tensile Strength ◽

Elastic Modulus ◽

Tensile Properties ◽

Cellulose Nanofibrils ◽

Deep Eutectic Solvent ◽

Microfluidic Channel ◽

Cellulose Nanofibril ◽

Pure Cellulose ◽

Alginate Fibers ◽

Cacl2 Solution

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 > PCNF/AL > TOLCNF/AL > AL. An increase in the spinning rate improved the tensile properties.

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