Physical and Mechanical Properties of Cellulose Nanofibril Films from Bleached Eucalyptus Pulp by Endoglucanase Treatment and Microfluidization

Wang, Wang‐Xia; Sabo, Ronald; Mozuch, Michael D.; Kersten, Philip J.; Zhu, Junyong; Jin, Yongcan

doi:10.1007/s10924-015-0726-7

Cited by 53 publications

(30 citation statements)

References 19 publications

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“…Cellulose is a linear polymer of b-1,4-glucose organized into fibrils, the main constituent of the plant cell wall (Szymańska-Chargot et al 2011). Cellulose individual fibrils are well known for their unique properties such high mechanical strength, making them comparable to such materials as the Kevlar fibre or steel wire (Brinchia et al 2013;Moon et al 2011;Wang et al 2015). Moreover, there is growing research interest in the use of cellulose nanomaterials such as nanofibrillated cellulose and cellulose nanocrystals as eco-friendly fillers and reinforcement for existing composites (Moon et al 2011;Ä mmälä et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…CNF or, in general, nanocellulose films are often called nanopapers due to the analogous production methods with cellulosic-based paper (Klemm et al 2011;Stark 2016). The CNF films themselves are highly flexible due to the entangled network of ultrathin nanofibrils (Wang et al 2015). Moreover, CNF-only films have good optical transparency, and the addition of CNF to polymers does not affect the transparency (Abdul Khalil et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Influence of chitosan addition on the mechanical and antibacterial properties of carrot cellulose nanofibre film

et al. 2019

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Films of carrot cellulose nanofibrils (CCNFs) with the addition of low-viscosity chitosan (CHIT) were prepared by the vacuum filtration. The chitosan content in the films varied from 9 to 33% (dry wt. basis). The surface morphology of the films was investigated by scanning electron microscopy, and it was found that chitosan was dispersed in the CCNF matrix. The interaction between CCNFs and CHIT was evaluated in terms of Fourier transform infrared spectroscopy (FTIR). The obtained results suggested physical interactions rather than hydrogen bonding between CCNFs and CHIT. This finding also supports the results of the water wettability experiment. The addition of chitosan to the nanocellulose matrix causes an increase in the water contact angle, i.e., the surface of the composites becomes more hydrophobic. This increase is probably connected to an interaction between nanocellulose and chitosan forming a denser structure. Analyses of thermal properties showed that the composites are stable under high temperature, and the degradation occurred above 300°C. It was found that the addition of CHIT to CCNF matrices caused a decrease in the Young's modulus-the higher that the concentration of chitosan in the composite was, the lower the Young's modulus (decreased from 14.71 GPa for CCNFs to 8.76 GPa for CCNF/ CHIT_5). Additionally, the tensile strength of composites, i.e., the maximum force that causes a fracture decreased after the addition of chitosan (decreased from 145.83 MPa for CCNFs to 129.43 MPa for CCNF/CHIT_5). The results indicated the highest inhibitory effect of the investigated composites against E. coli and S. epidermidis. Whereas M. luteus was inhibited only by the higher concentration of chitosan in the tested composites, inhibition was not found against C. krissii and all tested filamentous fungi.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of chitosan addition on the mechanical and antibacterial properties of carrot cellulose nanofibre film

et al. 2019

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“…Various types of mechanical methods have been applied to produce CNFs, including homogenization, micro-grinding, microfluidization, and cryocrushing (Nair et al 2014;Wang et al 2015a;Tian et al 2016). These techniques are the most efficient for delamination of fiber cell walls and CNF production.…”

Section: Introductionmentioning

confidence: 99%

Enzyme-assisted Mechanical Fibrillation of Bleached Spruce Kraft Pulp for Producing Well-dispersed and Uniform-sized Cellulose Nanofibrils

Bian¹,

Li²,

Ji³

et al. 2016

BioResources

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Cellulose nanofibrils (CNFs) are bionanomaterials with many promising properties and great potential in composite applications. Herein, welldispersed and uniform-sized cellulose nanofibrils were successfully obtained from commercially bleached softwood kraft pulp, resulting in yields of 79.15% via enzyme-assisted hydrolysis and subsequent homogenization. Field emission scanning electron microscopy (FE-SEM) confirmed the fiber morphology. The water retention value (WRV) was increased from 107% of original pulp to 1384% of the resulting CNFs, while crystallinity had no significant changes. Fourier transform infrared (FTIR) spectroscopy indicated that enzymes degraded a portion of hemicelluloses and residual lignin. CNFs subjected to enzymatic treatment and homogenization had a less entangled network, larger aspect ratio, and higher transmittance than those from pure mechanical treatment. They were well dispersed in an aqueous solution and uniformly sized in morphology, resolving the present challenge of nanomaterials tendency for agglomeration. These results revealed that the enzymeassisted process had a remarkable effect on the production of CNFs and made CNFs more appealing for nanotechnology applications and nanomaterial.

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“…It is also found from bacteria, fungi, algae, amoebas, and sea animals [1]. The vast abundance and renewability of cellulose make it an 'almost inexhaustible' [2,3] material.…”

Section: Introductionmentioning

confidence: 99%

Applications of cellulose nanomaterials in pharmaceutical science and pharmacology

Cao¹

2018

Express Polym. Lett.

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Abstract. Cellulose nanomaterials (CNs) have been successfully applied to a variety of scientific areas in recent years with remarkable engineering utilities. As sustainable materials of huge abundance, CNs show significant potentials in fine-tune the microstructures and kinetics from the nano-level. This paper reviews recent key advancements of the use of CNs in the fields of pharmaceutical science and pharmacology. A broad overview of the development of CNs is provided, and the current methods to obtain the materials are discussed. The different types of processing techniques are reviewed, that are critical to the applications in pharmaceutical science and pharmacology. The key breakthroughs of applications in major fields are discussed, including oral administration, topical administration, tissue scaffolds, and antibacterial applications.

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Physical and Mechanical Properties of Cellulose Nanofibril Films from Bleached Eucalyptus Pulp by Endoglucanase Treatment and Microfluidization

Cited by 53 publications

References 19 publications

Influence of chitosan addition on the mechanical and antibacterial properties of carrot cellulose nanofibre film

Influence of chitosan addition on the mechanical and antibacterial properties of carrot cellulose nanofibre film

Enzyme-assisted Mechanical Fibrillation of Bleached Spruce Kraft Pulp for Producing Well-dispersed and Uniform-sized Cellulose Nanofibrils

Applications of cellulose nanomaterials in pharmaceutical science and pharmacology

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