2020
DOI: 10.1016/j.carbpol.2020.115942
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Preparation and characterization of high yield cellulose nanocrystals (CNC) derived from ball mill pretreatment and maleic acid hydrolysis

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Cited by 152 publications
(52 citation statements)
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“…The residual components such as hemicellulose and lignin were also substantially removed from all samples with the absence of peaks at 1741 cm −1 (ester group stretching) and 1534 cm −1 (C=C aromatic vibration), respectively [ 27 ]. Furthermore, the “crystallinity peaks’” at 1425 cm −1 (symmetric CH 2 stretching) and 1464 cm −1 (asymmetric CH 2 stretching) increased in intensities for CPNC3, implying the enhanced crystallites structure within cellulose [ 20 , 28 ]. Additionally, the anhydroglucose-related peaks at 1373 cm −1 (C–H asymmetric stretching), 1092 cm −1 (C–O–C pyranose ring), and 865 cm −1 (β-1,4-glycosidic linkage) were observed for each sample, signaling the typical functional chemistry of NCC product [ 29 ].…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The residual components such as hemicellulose and lignin were also substantially removed from all samples with the absence of peaks at 1741 cm −1 (ester group stretching) and 1534 cm −1 (C=C aromatic vibration), respectively [ 27 ]. Furthermore, the “crystallinity peaks’” at 1425 cm −1 (symmetric CH 2 stretching) and 1464 cm −1 (asymmetric CH 2 stretching) increased in intensities for CPNC3, implying the enhanced crystallites structure within cellulose [ 20 , 28 ]. Additionally, the anhydroglucose-related peaks at 1373 cm −1 (C–H asymmetric stretching), 1092 cm −1 (C–O–C pyranose ring), and 865 cm −1 (β-1,4-glycosidic linkage) were observed for each sample, signaling the typical functional chemistry of NCC product [ 29 ].…”
Section: Resultsmentioning
confidence: 99%
“…XRD diffractogram of NCCs is shown in Figure 4 . All samples showed pronounced peaks at 15.2°, 16.7°, 22.6°, and 34.5°, which correlated, respectively, to (1–10), (110), (200), and (004) crystallography planes of Iβ cellulose polymorph structure [ 28 , 29 ]. The peak intensity at 22.6° was greatly enhanced for both CPNC2 and CPNC3 samples, indicating the cellulose crystalline region was predominant in the sample [ 20 , 27 ].…”
Section: Resultsmentioning
confidence: 99%
“…On the other hand, the yield of CNCs in this process (24%) is lower when compared to the formic acid hydrolysis. [67] Chen and co-workers proposed a simple environmentally benign procedure using 70 wt% of oxalic acid for the isolation of CNCs from the bleached eucalyptus pulp. The acid hydrolysis was carried out at a temperature of 100 C for 45 min.…”
Section: Organic Acid Hydrolysismentioning
confidence: 99%
“…There are two main extraction processes in the preparation of nanocelluloses: chemical (such as acid hydrolysis [ 23 , 24 , 25 ] and enzymatic hydrolysis [ 19 , 20 ]) and mechanical treatments (including milling, high-pressure homogenization and ultrasonication [ 26 , 27 ]). Methods that combine chemical and mechanical treatments (such as high-pressure homogenization coupled with strong acid hydrolysis pretreatments [ 28 ] or ball mill pretreatment combined with maleic acid hydrolysis [ 29 ]) were found to generate high quality products [ 30 ]. The preparation process has a considerable influence on the surface structure of nanocellulose.…”
Section: Introductionmentioning
confidence: 99%