An Ultrastrong Nanofibrillar Biomaterial: The Strength of Single Cellulose Nanofibrils Revealed via Sonication-Induced Fragmentation

Saito, Tsuguyuki; Kuramae, Ryota; Wohlert, Jakob; Berglund, Lars A.; Isogai, Akira

doi:10.1021/bm301674e

Cited by 532 publications

(398 citation statements)

References 44 publications

(71 reference statements)

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“…[1][2][3][4][5] TEMPO-oxidized cellulose nanofibrils (TOCN) are a subcategory of CNFs which are chemically modified to possess abundant carboxylic acid groups on their surface and thus negative charge at neutral pH conditions. 6,7 Due to their high density surface charge, TOCNs can be disintegrated from pulp with relatively low energy consumption to result in well-dispersed fibrils with very small diameters (typically 3 -5 nm).…”

Section: Introductionmentioning

confidence: 99%

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

et al. 2017

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ABSTRACT. Fiber spinning of anionic TEMPO-oxidized cellulose (TOCN) nanofibrils with polycations by interfacial polyelectrolyte complexation is demonstrated. The formed fibers were mostly composed of cellulose nanofibrils and the polycations were a minor constituent, leading to yield and ultimate strengths of ca. 100 MPa and ca. 200 MPa, and Young's modulus of ca. 15 GPa.Stretching of the as-formed wet filaments of TOCN/polycation by 20 % increased the Young's modulus, yield strength, and ultimate tensile strength by approximately 45, 36 and 26 %, respectively. Importantly, feasibility of compartmentalized wound bicomponent fibers by simultaneous spinning of two fibers of different compositions and entwining them together was shown. This possibility was further exploited to demonstrate reversible shape change of a bicomponent fiber directly by humidity change, and indirectly by temperature changes based on thermally dependent humidity absorption.The demonstrated route for TOCN-based fiber preparation is expected to open up new avenues in the application of nanocelluloses in advanced fibrous materials, crimping, and responsive smart textiles.

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Section: Introductionmentioning

confidence: 99%

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

et al. 2017

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“…5,6 CNCs have attracted tremendous interests due to its unique properties including high crystallinity of over 90%, 7,8 extraordinary elastic modulus of 110−220 GPa 4,9,10 and outstanding tensile strength of 2−6 GPa. 11 CNCs reported to date have focused primarily on those hydrolyzed from purified cellulose from sources such as bleached wood pulp, 5,12 bacteria, 13 cotton, 14,15 tunicate, 16,17 microcrystalline cellulose, 18 as well as agricultural residues, including rice straw 8,19 and husk, 20 grape pomace, 21 wheat straw, 22 tomato 23 and potato 24 peels, banana plants, 25 and so on. As cellulose microfibrils are tightly embedded in lignin and hemicellulose matrixes, 26,27 isolation of pure cellulose requires intensive chemical and energy input.…”

Section: ■ Introductionmentioning

confidence: 99%

Holocellulose Nanocrystals: Amphiphilicity, Oil/Water Emulsion, and Self-Assembly

Jiang

Hsieh

2015

Biomacromolecules

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Amphiphilic holoCNCs were derived from rice straw holocellulose by sulfuric acid hydrolysis (64%, 45 °C, 45 min) at 11.6% yield (8.8% of rice straw). HoloCNCs are similar in lateral dimensions (4.1 ± 1.6 nm thick, 6.4 ± 1.8 nm wide), but shorter and more heterogeneous in lengths (113 ± 70 nm long), less negatively charged (0.128 mmol/g) and less crystalline (CrI 84.4%) than CNCs. HoloCNCs were also more thermally stable (T max =284 °C), attributed to the presence of residual lignosulfonate, hemicellulose, and silica. Most remarkable, the amphiphilic holoCNCs were more hydrophobic than CNCs, exhibiting distinct surface active behaviors and lowering equilibrium surface tension to 49.2 mN/m at above 0.57% critical aggregation concentration. HoloCNCs not only stabilize 30% more oil-in-water (O/W) emulsion and formed droplets (1.2−1.6 μm) doubled the sizes of those with CNCs, but also self-assembled into highly mesoporous structures with up to 3× higher specific surface (111 m 2 /g) and total pore volume (0.40 cm 3 /g) than that from CNCs upon freeze-drying. The unique surface active, amphiphilic, and less self-assembling properties of holoCNCs offer new desirable characteristics but without additional isolation process nor surface modification of CNCs.

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“…As aforementioned, the Young's modulus of an individual BC nanofiber was estimated to be 114 GPa. Whilst the single fiber tensile strength of BC is not known, the tensile strength of single TEMPO-oxidized wood and tunicate fibers has been recently measured using ultrasonic induced cavitation 36 . A tensile strength of between 0.8-1.5 GPa was measured for these single nanofibers.…”

Section: Discussionmentioning

confidence: 99%

Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder

Lee

Shamsuddin

Fortea-Verdejo

et al. 2014

JoVE

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A novel method of manufacturing rigid and robust natural fiber preforms is presented here. This method is based on a papermaking process, whereby loose and short sisal fibers are dispersed into a water suspension containing bacterial cellulose. The fiber and nanocellulose suspension is then filtered (using vacuum or gravity) and the wet filter cake pressed to squeeze out any excess water, followed by a drying step. This will result in the hornification of the bacterial cellulose network, holding the loose natural fibers together.Our method is specially suited for the manufacturing of rigid and robust preforms of hydrophilic fibers. The porous and hydrophilic nature of such fibers results in significant water uptake, drawing in the bacterial cellulose dispersed in the suspension. The bacterial cellulose will then be filtered against the surface of these fibers, forming a bacterial cellulose coating. When the loose fiber-bacterial cellulose suspension is filtered and dried, the adjacent bacterial cellulose forms a network and hornified to hold the otherwise loose fibers together.

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An Ultrastrong Nanofibrillar Biomaterial: The Strength of Single Cellulose Nanofibrils Revealed via Sonication-Induced Fragmentation

Cited by 532 publications

References 44 publications

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

Holocellulose Nanocrystals: Amphiphilicity, Oil/Water Emulsion, and Self-Assembly

Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder

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