文献类型：期刊文献

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

作者：Zhang, Kaitao[1] Sun, Peipei[1] Liu, He[1,2] Shang, Shibin[1,2] Song, Jie[3] Wang, Dan[1,2]

第一作者：Zhang, Kaitao

通信作者：Wang, D[1]|[a000598870cdaa2acac5b]王丹;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key & Open Lab Forest Chem Engn, SFA, Nanjing 210042, Jiangsu, Peoples R China;[2]CAF, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[3]Univ Michigan, Dept Chem & Biochem, Flint, MI 48502 USA

年份：2016

卷号：138

起止页码：237-243

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20155101680159);Scopus(收录号：2-s2.0-84949550315);WOS:【SCI-EXPANDED(收录号:WOS:000368096400028)】；

基金：The authors would like to thank National Natural Science Foundation of China (31170540), Special Funds Projects for Basic Scientific Research Business Expenses of Central Public Welfare Research Institutes in Chinese Academy of Forestry (CAFINT2015C01) and Natural Science Foundation of Jiangsu Province of China (BK2011111) for financial supports.

语种：英文

外文关键词：Extraction; Carboxylated cellulose nanocrystals; Oxidation; TEMPO; Ammonium persulfate

摘要：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. (C) 2015 Elsevier Ltd. All rights reserved.