All-cellulose Materials Adhered with Cellulose Nanofibrils

The recent strategies in preparation of cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs) were described. CNCs and CNFs are two types of nanocelluloses (NCs), and they possess various superior properties, such as large specific surface area, high tensile strength and stiffness, low density, and low thermal expansion coefficient. Due to various applications in biomedical engineering, food, sensor, packaging, and so on, there are many studies conducted on CNCs and CNFs. In this review, various methods of preparation of CNCs and CNFs are summarized, including mechanical, chemical, and biological methods. The methods of pretreatment of cellulose are described in view of the benefits to fibrillation.

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Biomimetic adsorption of zwitterionic–xyloglucan block copolymers to CNF: towards tailored super-absorbing cellulose materials

RSC Advances ◽

10.1039/c6ra28236a ◽

2017 ◽

Vol 7 (24) ◽

pp. 14947-14958 ◽

Cited By ~ 8

Author(s):

F. L. Hatton ◽

J. Engström ◽

J. Forsling ◽

E. Malmström ◽

A. Carlmark

Keyword(s):

Block Copolymer ◽

Block Copolymers ◽

Cellulose Nanofibrils ◽

Cellulose Materials

Block-copolymer of xyloglucan and zwitterionic PSBMA prepared by RAFT as a biomimetic adsorbent for cellulose nanofibrils to create super-adsorbing gels.

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Facile preparation of nanofiller-paper using mixed office paper without deinking

TAPPI Journal ◽

10.32964/tj14.3.167 ◽

2015 ◽

Vol 14 (3) ◽

pp. 167-174 ◽

Cited By ~ 8

Author(s):

QIANQIAN WANG ◽

J.Y. ZHU

Keyword(s):

Cellulose Nanofibrils ◽

Ash Content ◽

Raw Material ◽

Mechanical Grinding ◽

Microscope Imaging ◽

Facile Preparation ◽

Electron Microscope Imaging ◽

Thermal Stability Of ◽

Scanning Electron ◽

Office Paper

Mixed office paper (MOP) pulp without deinking with an ash content of 18.1 ± 1.5% was used as raw material to produce nanofiller-paper. The MOP pulp with filler was mechanically fibrillated using a laboratory stone grinder. Scanning electron microscope imaging revealed that the ground filler particles were wrapped by cellulose nanofibrils (CNFs), which substantially improved the incorporation of filler into the CNF matrix. Sheets made of this CNF matrix were densified due to improved bonding. Specific tensile strength and modulus of the nanofiller-paper with 60-min grinding reached 48.4 kN·m/kg and 8.1 MN·m/kg, respectively, approximately 250% and 200% of the respective values of the paper made of unground MOP pulp. Mechanical grinding duration did not affect the thermal stability of the nanofiller-paper.

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An effective method for determining the retention and distribution of cellulose nanofibrils in paper handsheets by dye labeling

TAPPI Journal ◽

10.32964/tj17.03.157 ◽

2018 ◽

Vol 17 (03) ◽

pp. 157-164 ◽

Cited By ~ 3

Author(s):

Shengdan Wang ◽

Wenhua Gao ◽

Kefu Chen ◽

Jinsong Zeng ◽

Jun Xu ◽

...

Keyword(s):

Correlation Coefficient ◽

Congo Red ◽

Kraft Pulp ◽

Cellulose Nanofibrils ◽

Standard Curve ◽

Congo Red Dye ◽

Mechanical Disintegration ◽

Softwood Kraft Pulp ◽

White Water ◽

Red Dye

Cellulose nanofibrils (CNF) were prepared by cellulase in conjunction with mechanical disintegration from the bleached softwood kraft pulp and labelled by Congo red dye. The labelled CNF were used to investigate the retention and distribution of CNF in paper handsheets. The retention of the labelled CNF was obtained by measuring the absorbance of white water using an ultraviolet-visible spectrophotometer. The results showed that this method for measuring the retention was rapid, feasible, and sensitive, owing to the high correlation coefficient R2 (0.9993) of the standard curve. The labelled CNF showed even distribution in paper handsheets. The colorimetric values of paper handsheets were explored with a residual ink analyzer.

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Cellulose Nanofibrils-based Hydrogels for Biomedical Applications: Progresses and Challenges

Current Medicinal Chemistry ◽

10.2174/0929867327666200303102859 ◽

2020 ◽

Vol 27 (28) ◽

pp. 4622-4646 ◽

Cited By ~ 1

Author(s):

Huayu Liu ◽

Kun Liu ◽

Xiao Han ◽

Hongxiang Xie ◽

Chuanling Si ◽

...

Keyword(s):

Mechanical Properties ◽

Metal Ion ◽

Biomedical Applications ◽

Biomedical Application ◽

Cellulose Nanofibrils ◽

Wound Dressings ◽

Preparation Methods ◽

Tissue Scaffold ◽

Surface Areas ◽

Mechanical Methods

Background: Cellulose Nanofibrils (CNFs) are natural nanomaterials with nanometer dimensions. Compared with ordinary cellulose, CNFs own good mechanical properties, large specific surface areas, high Young's modulus, strong hydrophilicity and other distinguishing characteristics, which make them widely used in many fields. This review aims to introduce the preparation of CNFs-based hydrogels and their recent biomedical application advances. Methods: By searching the recent literatures, we have summarized the preparation methods of CNFs, including mechanical methods and chemical mechanical methods, and also introduced the fabrication methods of CNFs-based hydrogels, including CNFs cross-linked with metal ion and with polymers. In addition, we have summarized the biomedical applications of CNFs-based hydrogels, including scaffold materials and wound dressings. Results: CNFs-based hydrogels are new types of materials that are non-toxic and display a certain mechanical strength. In the tissue scaffold application, they can provide a micro-environment for the damaged tissue to repair and regenerate it. In wound dressing applications, it can fit the wound surface and protect the wound from the external environment, thereby effectively promoting the healing of skin tissue. Conclusion: By summarizing the preparation and application of CNFs-based hydrogels, we have analyzed and forecasted their development trends. At present, the research of CNFs-based hydrogels is still in the laboratory stage. It needs further exploration to be applied in practice. The development of medical hydrogels with high mechanical properties and biocompatibility still poses significant challenges.

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Modification of Wood with Monoethanolamino-borate by The Data of X-Ray Photoelectron Spectroscopy

MATEC Web of Conferences ◽

10.1051/matecconf/201819604005 ◽

2018 ◽

Vol 196 ◽

pp. 04005

Author(s):

Irina Stepina ◽

Irina Kotlyarova

Keyword(s):

Particle Size ◽

Photoelectron Spectroscopy ◽

Model Compound ◽

Hydrolytic Stability ◽

Photoelectron Spectra ◽

Wood Cellulose ◽

Rapid Loss ◽

X Ray ◽

Wood Protection ◽

Cellulose Materials

The difficulty of wood protection from biocorrosion and fire is due to the fact that modifiers in use are washed out from the surface of the substrate under the influence of environmental factors. This results in a rapid loss of the protective effect and other practically important wood characteristics caused by the modification. To solve this problem is the aim of our work. Here, monoethanolaminoborate is used as a modifier, where electron-donating nitrogen atom provides a coordination number equal to four to a boron atom, which determines the hydrolytic stability of the compounds formed. Alpha-cellulose ground mechanically to a particle size of 1 mm at most was used as a model compound for the modification. X-ray photoelectron spectra were recorded on the XSAM-800 spectrometer (Kratos, UK). Prolonged extraction of the modified samples preceded the registration of the photoelectron spectra to exclude the fixation of the modifier molecules unreacted with cellulose. As a result of the experiment, boron and nitrogen atoms were found in the modified substrate, which indicated the hydrolytic stability of the bonds formed between the modifier molecules and the substrate. Therefore monoethanolaminoborate can be considered as a non-extractable modifier for wood-cellulose materials.

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Humidity‐Induced Nanoscale Restructuring in PEDOT:PSS and Cellulose Nanofibrils Reinforced Biobased Organic Electronics

Advanced Electronic Materials ◽

10.1002/aelm.202100137 ◽

2021 ◽

pp. 2100137

Author(s):

Calvin J. Brett ◽

Ola K. Forslund ◽

Elisabetta Nocerino ◽

Lucas P. Kreuzer ◽

Tobias Widmann ◽

...

Keyword(s):

Organic Electronics ◽

Cellulose Nanofibrils

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Superelastic and flexible 3D printed waterborne polyurethane/cellulose nanofibrils structures

Additive Manufacturing ◽

10.1016/j.addma.2021.102107 ◽

2021 ◽

pp. 102107

Author(s):

Yuan Chen ◽

Zhengyang Yu ◽

Hale Oguzlu ◽

Jungang Jiang ◽

MiJung Cho ◽

...

Keyword(s):

Cellulose Nanofibrils ◽

Waterborne Polyurethane ◽

3D Printed

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Layer-by-Layer Spray-Coating of Cellulose Nanofibrils and Silver Nanoparticles for Hydrophilic Interfaces

ACS Applied Nano Materials ◽

10.1021/acsanm.0c02819 ◽

2021 ◽

Author(s):

Qing Chen ◽

Calvin J. Brett ◽

Andrei Chumakov ◽

Marc Gensch ◽

Matthias Schwartzkopf ◽

...

Keyword(s):

Silver Nanoparticles ◽

Cellulose Nanofibrils ◽

Spray Coating ◽

Layer By Layer

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Production of cellulose nanofibrils and films from elephant grass using deep eutectic solvents and a solid acid catalyst

RSC Advances ◽

10.1039/d1ra02259h ◽

2021 ◽

Vol 11 (23) ◽

pp. 14071-14078

Author(s):

Xi-Que Wu ◽

Pan-Dao Liu ◽

Qun Liu ◽

Shu-Ying Xu ◽

Yu-Cang Zhang ◽

...

Keyword(s):

Solid Acid ◽

Solid Acid Catalyst ◽

Cellulose Nanofibrils ◽

Acid Catalyst ◽

Deep Eutectic Solvents ◽

Elephant Grass ◽

Film Forming ◽

New Strategy

A new strategy was developed to produce cellulose nanofibrils and films from elephant grass using deep eutectic solvents and a recyclable solid acid catalyst with assistance of ultrasonic disintegration and a suction filtration film forming method.

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