TEMPO-mediated oxidation of MCC at high temperature: Synthesis and characterization of high-hydrophilic polymer |
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| Authors: | Lin Li Shuai Zhao Zhenxiu Zhang Hongqi Hu Jin Kuk Kim |
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| Affiliation: | 1.School of Nano & Advanced Materials Engineering,Gyeongsang National University,Jinju,Korea;2.Qingdao Sifang Rolling Stock Research Institute Co., Ltd.,Qingdao,China;3.Key Laboratory of Rubber-Plastics, Ministry of Education,Qingdao University of Science and Technology,Qingdao,China;4.Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou,China |
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| Abstract: | Microcrystalline cellulose was reacted with catalytic amounts of 2, 2, 6, 6-tetramethyl-1-piperidine oxoammonium salt (TEMPO), sodium hypochlorite and sodium bromide in Na2CO3/NaHCO3 buffer solution at different temperatures (30 °C, 40 °C, 50 °C). The oxidation procedures included first oxidation and second oxidation. The yield of cellouronic acid produced in the second oxidation was higher than the yield of cellouronic acid produced in the first oxidation at the same oxidation temperature. Moreover, an interesting “high-hydrophilic” phenomenon appeared at higher temperature during microcrystalline cellulose second oxidation (30 °C, 40 °C, 50 °C). Properties associated with the chemical characteristics are discussed by XRD, FTIR, 13C-NMR and Laser Particle Analyzer in view of its interesting high-hydrophilic effects. |
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