化工学报 ›› 2018, Vol. 69 ›› Issue (7): 3076-3082.DOI: 10.11949/j.issn.0438-1157.20171494

• 分离工程 • 上一篇    下一篇

球形聚合单宁-纤维素树脂的制备及吸附性能

周鹏, 袁花, 彭平英, 姚津鑫, 彭志远   

  1. 吉首大学化学化工学院, 湖南 吉首 416000
  • 收稿日期:2017-11-29 修回日期:2018-03-28 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: 彭志远
  • 基金资助:

    国家自然科学基金项目(31760196)。

Preparation and adsorption properties of spherical poly(tannin)-cellulose resin

ZHOU Peng, YUAN Hua, PENG Pingying, YAO Jinxin, PENG Zhiyuan   

  1. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, China
  • Received:2017-11-29 Revised:2018-03-28 Online:2018-07-05 Published:2018-07-05
  • Supported by:

    supported by the National Natural Science Foundation of China (31760196).

摘要:

单宁与多聚甲醛交联合成单宁酚醛聚合物,再以环氧氯丙烷为交联剂,将单宁酚醛聚合物与纤维素通过反相悬浮交联制备球形聚合单宁-纤维素树脂。通过傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)对球形聚合单宁-纤维素树脂的结构进行了表征,并考察了球形聚合单宁-纤维素树脂对盐酸小檗碱的吸附性能。结果表明,球形聚合单宁-纤维素树脂具有多孔的结构,树脂网络中含有大量的酚羟基;球形聚合单宁-纤维素树脂对盐酸小檗碱具有较好的吸附性能,当盐酸小檗碱浓度为600 mg·L-1、吸附温度为298 K时,最大饱和吸附量可达245.92mg·g-1;球形聚合单宁-纤维素树脂对盐酸小檗碱的吸附过程符合Langmuir吸附等温模型和准二级吸附动力学方程,热力学研究数据表明球形单宁-纤维素树脂对盐酸小檗碱的吸附是一个自发放热的物理吸附过程。该树脂在分离提纯生物碱方面具有潜在的应用前景。

关键词: 单宁, 纤维素, 吸附, 盐酸小檗碱, 热力学, 动力学

Abstract:

Tannin was crosslinked with paraformaldehyde to prepare tannin-phenolic polymer. The spherical poly(tannin)-cellulose resin was synthesized by inversing suspension cross-linking reaction of tannin-phenolic polymer and cellulose with epichlorohydrin as crosslinking agent. The spherical poly(tannin)-cellulose resin was characterized by infrared spectrum(FTIR) and scanning electron microscopy(SEM), and the adsorption properties of spherical poly(tannin)-cellulose resin for berberine hydrochloride were evaluated. The spherical poly(tannin)-cellulose resin has a porous structure and a large amount of phenolic hydroxyl groups in polymer network. The spherical poly(tannin)-cellulose resin has high adsorption capacity for berberine hydrochloride, the maximum adsorption capacity of berberine hydrochloride on spherical poly(tannin)-cellulose resin was 245.92 mg·g-1 when the initial concentration of berberine hydrochloride was 600 mg·L-1 at 298 K. The adsorption isotherms and kinetics of spherical poly(tannin)-cellulose resin for berberine hydrochloride can be well fitted by the Langmuir equation and pseudo-second-order model, respectively. The data of thermodynamic analysis suggest that the adsorption for berberine hydrochloride on spherical poly(tannin)-cellulose resin was a spontaneous and exothermic physical adsorption process. The spherical poly(tannin)-cellulose resin has a potential application prospect in the field of the separation and purification of alkaloids.

Key words: tannin, cellulose, adsorption, berberine hydrochloride, thermodynamic, kinetics

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