β-环糊精固化单宁复合微球制备及吸附性能研究

doi:10.3969/j.issn.1001-1803.2021.10.007

摘要/Abstract

摘要：

以β-环糊精、单宁为单体,环氧氯丙烷为交联剂,反相悬浮交联制备β-环糊精/单宁复合微球。通过红外光谱法、X射线衍射法对微球进行表征,证明单宁成功固定在β-环糊精上。以阳离子染料亚甲基蓝为有机吸附质模型,考察了染料初始溶液pH、初始溶液质量浓度对微球吸附性能的影响。吸附性能实验表明,pH在中性条件下,β-环糊精空腔与单宁酚羟基协同作用,有利于提高微球与亚甲基蓝之间的静电吸附能力,吸附率为80.31%;当亚甲基蓝初始浓度增大至1 000 mg/L时,网络中的空隙被填充,吸附位点趋于饱和,吸附量最大达到630.41 mg/g。β-环糊精/单宁复合微球具有较好的重复使用性能,大大提高了2种单体在工业废水吸附领域的应用价值。

关键词: β-环糊精;, 单宁, 微球, 亚甲基蓝, 吸附

Abstract:

The β-cyclodextrin/tannin composite microspheres （β-CD/TA） were prepared by reverse suspension crosslinking polymerization, using β-cyclodextrin and tannin as monomers, and epichlorohydrin as a crosslinker. The microspheres were characterized by infrared spectroscopy and X-ray diffraction, which proved that tannin was successfully immobilized on β-cyclodextrin. Taking methylene blue （a cationic dye） as the model organic adsorbent, the effects of the pH and mass concentration of the initial solution of the dye on the adsorption performance of the microspheres were investigated. The adsorption experiment showed that the synergistic action between β-cyclodextrin cavity and tannic hydroxyl group was beneficial to improve the electrostatic adsorption between microspheres and methylene blue under neutral pH conditions, and the adsorption rate was 80.31%. When the initial concentration of methylene blue was increased to 1 000 mg/L, the gaps in the network were filled, the adsorption sites tended to be saturated, and the maximum adsorption capacity reached 630.41 mg/g. The β-cyclodextrin/tannin composite microspheres have good reuse performance, which greatly improves the application value of the two monomers in the field of industrial wastewater adsorption.

Key words: β-cyclodextrin, tannin, microsphere, methylene blue, adsorption

中图分类号:

TQ658

金绍娣,顾东雅,石智超. β-环糊精固化单宁复合微球制备及吸附性能研究[J]. 日用化学工业, 2021, 51(10): 969-974.

Jin Shaodi,Gu Dongya,Shi Zhichao. Study on the preparation and adsorption properties of β-cyclodextrin/tannin composite microspheres[J]. China Surfactant Detergent & Cosmetics, 2021, 51(10): 969-974.

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名称	吸附量/(mg·g^-1)	吸附率/%
β-CD微球	301.93±5.44	65.34±0.89
未交联固化β-CD/TA微球	356.21±6.87	69.69±1.09
β-CD/TA复合微球	421.03±7.25	79.17±1.29