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Fabrication and Properties of Tree-Branched Cellulose Nanofibers (CNFs) via Acid Hydrolysis Assisted with Pre-Disintegration Treatment

Nanomaterials (Basel, Switzerland), 2022-06, Vol.12 (12), p.2089 [Peer Reviewed Journal]

2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 by the authors. 2022 ;ISSN: 2079-4991 ;EISSN: 2079-4991 ;DOI: 10.3390/nano12122089 ;PMID: 35745437

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Title:
Fabrication and Properties of Tree-Branched Cellulose Nanofibers (CNFs) via Acid Hydrolysis Assisted with Pre-Disintegration Treatment
Author: Li, Jun ; Liu, Dongyan ; Li, Junsheng ; Yang, Fei ; Sui, Guoxin ; Dong, Yu
Subjects: acid hydrolysis ; Caustic soda ; Cellulose ; Cellulose fibers ; Composite materials ; Crystal structure ; Crystallinity ; Degree of crystallinity ; Disintegration ; disintegration treatment ; Fabrication ; Fourier analysis ; Fourier transforms ; Hardwoods ; Hydrolysis ; Infrared analysis ; Infrared spectroscopy ; Morphology ; nanocellulose ; Nanofibers ; Porous materials ; Scanning electron microscopy ; Softwoods ; Spectrum analysis ; Structural stability ; Tensile strength ; Thermal stability ; Thermogravimetric analysis ; Transmission electron microscopy ; tree-branched cellulose nanofibers (CNFs) ; wood pulps ; X-ray diffraction
Is Part Of: Nanomaterials (Basel, Switzerland), 2022-06, Vol.12 (12), p.2089
Description: In this paper, the novel morphology of cellulose nanofibers (CNFs) with a unique tree-branched structure was discovered by using acid hydrolysis assisted with pre-disintegration treatment from wood pulps. For comparison, the pulps derived from both softwood and hardwood were utilized to extract nanocellulose in order to validate the feasibility of proposed material fabrication technique. The morphology, crystalline structures, chemical structures, and thermal stability of nanocellulose were characterized by means of transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetric analysis (TGA). Prior to acid hydrolysis, softwood and hardwood pulps underwent the disintegration treatment in the fiber dissociator. It has been found that nanocellulose derived from disintegrated pulps possesses much longer fiber length (approximately 5–6 μm) and more evident tree-branched structures along with lower degree of crystallinity when compared with those untreated counterparts. The maximum mass loss rate of CNFs takes place at the temperature level of approximately 225 °C, and appears to be higher than that of cellulose nanowhiskers (CNWs), which might be attributed to an induced impact of amorphous content. On the other hand, disintegration treatment is quite beneficial to the enhancement of tensile strength of nanocellulose films. This study elaborates a new route of material fabrication toward the development of well-tailored tree-branched CNFs in order to broaden the potential widespread applications of nanocellulose with diverse morphological structures.
Publisher: Basel: MDPI AG
Language: English
Identifier: ISSN: 2079-4991
EISSN: 2079-4991
DOI: 10.3390/nano12122089
PMID: 35745437
Source: DOAJ Directory of Open Access Journals
PubMed Central
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central

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Fabrication and Properties of Tree-Branched Cellulose Nanofibers (CNFs) via Acid Hydrolysis Assisted with Pre-Disintegration Treatment

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