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

doi:10.11949/j.issn.0438-1157.20171494

Abstract

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

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

CLC Number:

TQ321.2

ZHOU Peng, YUAN Hua, PENG Pingying, YAO Jinxin, PENG Zhiyuan. Preparation and adsorption properties of spherical poly(tannin)-cellulose resin[J]. CIESC Journal, 2018, 69(7): 3076-3082.

周鹏, 袁花, 彭平英, 姚津鑫, 彭志远. 球形聚合单宁-纤维素树脂的制备及吸附性能[J]. 化工学报, 2018, 69(7): 3076-3082.

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