固定β-环糊精制备不溶性β-环糊精聚合物及其催化性能

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (4): 784-792.

固定β-环糊精制备不溶性β-环糊精聚合物及其催化性能

江红果¹; 杨祖金²; 周贤太²; 方岩雄¹; 纪红兵²

¹ Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China ² School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China

收稿日期:2011-02-21 修回日期:2011-12-16 出版日期:2012-08-28 发布日期:2011-12-16

Immobilization of β-cyclodextrin as insoluble β-cyclodextrin polymer and its catalytic performance

JIANG Hongguo¹; YANG Zujin²; ZHOU Xiantai²; FANG Yanxiong¹; JI Hongbing²

¹Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China ²School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China

Received:2011-02-21 Revised:2011-12-16 Online:2012-08-28 Published:2011-12-16

摘要/Abstract

摘要： Insoluble β-cyclodextrin polymers were prepared from β-cyclodextrin (β-CD) using epichlorohydrin (EPI) as crosslinking agent under basic conditions. The polymers were characterized by Fourier Transform Infrared (FTIR), Thermogravimetry (TG), X-ray diffraction (XRD) and TG-FTIR. The results demonstrated that the polymerization between EPI and β-CD indeed occurred, and a number of CD rings were interconnected to form a three-dimensional network. Moreover, different factors influencing the polymerization, e.g. molar ratio of EPI to β-CD, the concentration of NaOH and reaction temperature, have been investigated. The polymer prepared under the optimal conditions (the molar ratio EPI: β-CD of 44, the NaOH concentration 50% in mass, and the temperature at 65 °C) showed excellent thermal stability and insolubility in organic solvents or strong acid/base. In addition, the β-cyclodextrin polymers also presented high catalytic activity for aqueous oxidation of benzyl alcohol with hy-pochlorite as oxidant.

关键词: &, beta, -cyclodextrin polymers, epichlorohydrin, polymerization, catalytic activity

Abstract: Insoluble β-cyclodextrin polymers were prepared from β-cyclodextrin (β-CD) using epichlorohydrin (EPI) as crosslinking agent under basic conditions. The polymers were characterized by Fourier Transform Infrared (FTIR), Thermogravimetry (TG), X-ray diffraction (XRD) and TG-FTIR. The results demonstrated that the polymerization between EPI and β-CD indeed occurred, and a number of CD rings were interconnected to form a three-dimensional network. Moreover, different factors influencing the polymerization, e.g. molar ratio of EPI to β-CD, the concentration of NaOH and reaction temperature, have been investigated. The polymer prepared under the optimal conditions (the molar ratio EPI: β-CD of 44, the NaOH concentration 50% in mass, and the temperature at 65 °C) showed excellent thermal stability and insolubility in organic solvents or strong acid/base. In addition, the β-cyclodextrin polymers also presented high catalytic activity for aqueous oxidation of benzyl alcohol with hy-pochlorite as oxidant.

Key words: &, beta, -cyclodextrin polymers, epichlorohydrin, polymerization, catalytic activity

江红果, 杨祖金, 周贤太, 方岩雄, 纪红兵. 固定β-环糊精制备不溶性β-环糊精聚合物及其催化性能[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 784-792.

JIANG Hongguo, YANG Zujin, ZHOU Xiantai, FANG Yanxiong, JI Hongbing. Immobilization of β-cyclodextrin as insoluble β-cyclodextrin polymer and its catalytic performance[J]. Chin.J.Chem.Eng., 2012, 20(4): 784-792.

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