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Using a fully recyclable dicarboxylic acid for producing dispersible and thermally stable cellulose nanomaterials from different cellulosic sources

Cellulose (London), 2017-06, Vol.24 (6), p.2483-2498 [Peer Reviewed Journal]

Springer Science+Business Media Dordrecht (outside the USA) 2017 ;Copyright Springer Science & Business Media 2017 ;Cellulose is a copyright of Springer, (2017). All Rights Reserved. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-017-1277-y

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Title:
Using a fully recyclable dicarboxylic acid for producing dispersible and thermally stable cellulose nanomaterials from different cellulosic sources
Author: Jia, Chao ; Chen, Liheng ; Shao, Ziqiang ; Agarwal, Umesh P. ; Hu, Liangbing ; Zhu, J. Y.
Subjects: Aspect ratio ; Bioorganic Chemistry ; Bleaching ; Cellulose ; Cellulose esters ; Cellulose fibers ; Ceramics ; Chemistry ; Chemistry and Materials Science ; Composites ; Cotton ; Crystal structure ; Crystallinity ; Dicarboxylic acids ; Esterification ; Eucalyptus ; Fibrillation ; Filter paper ; Glass ; Hydrolysis ; Nanocrystals ; Nanomaterials ; Natural Materials ; Organic Chemistry ; Original Paper ; Oxalic acid ; Physical Chemistry ; Polymer Sciences ; Raman spectra ; Raman spectroscopy ; Spectrum analysis ; Stability analysis ; Sulfuric acid ; Sustainable Development ; Thermal stability ; Yeast
Is Part Of: Cellulose (London), 2017-06, Vol.24 (6), p.2483-2498
Description: We fabricated cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs) from different cellulose materials (bleached eucalyptus pulp (BEP), spruce dissolving pulp (SDP) and cotton based qualitative filter paper (QFP) using concentrated oxalic acid hydrolysis and subsequent mechanical fibrillation (for CNFs). The process was green as acid can be easily recovered, and the prepared cellulose nanomaterials were carboxylated and thermally stable. In detail, the CNC yield from the different materials was similar. After hydrolysis, the DP of the cellulose materials decreased substantially, whereas the mechanical fibrillation of the cellulosic solid residues (CSRs) did not dramatically reduce the DP of cellulose. CNCs with different aspect ratios were produced from different starting materials by oxalic acid hydrolysis. The CNCs and CNFs obtained from BEP and QFP possessed more uniform dimensions than those from SDP. On the other hand, CNFs derived from SDP presented the best suspension stability. FTIR analyses verified esterification of cellulose by oxalic acid hydrolysis. The results from both XRD and Raman spectroscopy indicated that whereas XRD crystallinity of CNCs from BEP and QFP did not change significantly, there was some change in Raman crystallinity of these samples. Raman spectra of SDP CNCs indicated that the acid hydrolysis preferably removed cellulose I portion of the samples and therefore the CNCs became cellulose II enriched. TGA revealed that the CNCs obtained from QFP exhibited higher thermal stability compared to those from BEP and SDP, and all the CNCs possessed better thermal stability than that of CNCs from sulfuric acid hydrolysis. The excellent properties of prepared cellulose nanomaterials will be conducive to their application in different fields.
Publisher: Dordrecht: Springer Netherlands
Language: English
Identifier: ISSN: 0969-0239
EISSN: 1572-882X
DOI: 10.1007/s10570-017-1277-y
Source: ProQuest Central

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Using a fully recyclable dicarboxylic acid for producing dispersible and thermally stable cellulose nanomaterials from different cellulosic sources

Springer Science+Business Media Dordrecht (outside the USA) 2017 ;Copyright Springer Science & Business Media 2017 ;Cellulose is a copyright of Springer, (2017). All Rights Reserved. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-017-1277-y

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