Extraction and comparison of carboxylated cellulose nanocrystals from bleached sugarcane bagasse pulp using two different oxidation methods

Carbohydrate Polymers
Kaitao ZhangDan Wang

Abstract

Two kinds of carboxylated cellulose nanocrystals (CCNs) were prepared by using ultrasonic assisted 2,2,6,6-tetramethylpiperidinyl-1-oxy radical (TEMPO) mediated oxidation and one-step ammonium persulfate (APS) oxidation, which were denoted as TEMPO-oxidized CCNs (TO-CCNs) and APS-oxidized CCNs (AO-CCNs), respectively. The effects of oxidant content on the yield, carboxyl content, degree of polymerization (DPv) and morphology of the oxidized celluloses in the two oxidation methods were studied. Furthermore, the chemical structure, crystallinity and thermal stability of TO-CCNs and AO-CCNs were evaluated and compared by Fourier transformed infrared spectra, X-ray diffraction and thermogravimetric analyses. The results showed that with increase of oxidant content in the two methods, the carboxyl groups on the surfaces of TO-CCNs and AO-CCNs were both improved. And a remarkable decline of the DPv of cellulose sample also appeared in the two oxidative treatments. In addition, AO-CCNs exhibited a higher crystallinity and an enhanced thermal stability compared with TO-CCNs.

References

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Citations

Apr 19, 2017·Journal of Agricultural and Food Chemistry·Xujuan HuangJie Song
Aug 29, 2018·Small·Kaitao Zhang, Henrikki Liimatainen
May 28, 2019·Critical Reviews in Food Science and Nutrition·Ahmed A OunJong-Whan Rhim
Apr 10, 2020·Advanced Materials·Yang YangKai Zhang
May 29, 2020·ChemPlusChem·Ting YangKai Zhang
Aug 17, 2020·Advanced Materials·Stephanie A KedziorEmily D Cranston
Sep 12, 2020·Nanomaterials·María Graciela AguayoPablo Reyes-Contreras
Feb 18, 2020·International Journal of Biological Macromolecules·Qiwen JiangYing Han
Nov 14, 2020·International Journal of Biological Macromolecules·Ragab E Abou-ZeidSamir Kamel
Oct 23, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Yifang GaoChuan Dong
Aug 31, 2021·Heliyon·Md Arif Mahmud, Ferdausee Rahman Anannya
Sep 8, 2021·Biomedical Microdevices·Anne Carolyne Mendonça CidreiraLucia Helena Innocentini Mei
Nov 5, 2020·Carbohydrate Polymers·Seyed Rahman Djafari PetroudyElham Vatankhah

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