10-DAB分子印迹纳米微球的合成及吸附性能研究

doi:10.3969/j.issn.0253-2417.2022.05.013

Abstract

Abstract:

Molecular imprinted nanospheres(MINs) with high selective adsorption to 10-deacetyl baccatin Ⅲ(10-DAB) was prepared by 10-DAB as template molecule, and 4-vinylpyridine(4-VP) was used as functional monomer. The maximum adsorption capacity reached to 37.42 mg/g. The polymer was characterized by scanning electron microscope(SEM), Fourier transform infrared spectroscopy(FT-IR) and thermogravimetric(TG) analysis, which indicated that it was successfully synthesized. The adsorption kinetics of 10-DAB-MINs could be well described by the pseudo-second-order model, and R² was 0.979 5. Meanwhile, the adsorption mechanism conformed to the Langmuir-Freundlich model, and R² was 0.982 7. The cyclic adsorption results showed that 10-DAB-MINs had better recycling ability than that of the template free molecular imprinted nanaspheres(NINs). Furthermore, the adsorption capacity of 10-DAB-MINs could still reach 28.66 mg/g after recycling for 5 times, which indicated the good stability.

Key words: molecular imprinting technique, 10-deacetyl bacatin Ⅲ, specificity recognition, nanospheres

CLC Number:

TQ35

Yijie WANG, Zheheng JIANG, Wenjia SUN, Xiaodan WU, Jingsong CAO, Yujie FU. Preparation and Adsorption Properties of 10-DAB Molecular Imprinted Nanospheres[J]. Chemistry and Industry of Forest Products, 2022, 42(5): 91-99.

Figures/Tables 13

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项目 items		吸附量/(mg·g^-1) adsorption capacity	聚合度/% degree of polymerization
功能单体种类 types of functional monomer	MAA	13.46	60.98
	AM	20.21	63.05
	4-VP	27.41	69.74
n_10-DAB∶n_4-VP	1∶6	7.02	55.34
	1∶7	18.54	63.98
	1∶8	8.59	56.17
	1∶9	18.06	63.52
	1∶10	27.41	69.73
n_10-DAB∶n_EGDMA	1∶20	19.49	65.34
	1∶30	27.42	69.69
	1∶40	26.41	66.62
	1∶50	20.07	65.04
聚合温度 polymerization temp.	50 ℃	27.10	69.38
	60 ℃	27.41	69.63
	70 ℃	15.34	60.16

样品 sample	准一级动力学pseudo-first-order			准二级动力学pseudo-second-order
样品 sample	Q_e	K₁	R²	Q_e	K₂	R²
10-DAB-MINs	38.75	0.021 4	0.978 7	45.16	5.44×10^-4	0.979 5
NINs	22.98	0.035 4	0.904 3	25.91	1.80×10^-3	0.821 8

样品 sample	Langmuir			Freundlich			Langmuir-Freundlich
样品 sample	Q_max	K_L	R²	1/n	K_F	R²	Q_max	K_d	R²
10-DAB-MINs	48.93	23.079	0.974 1	0.649 2	500.587	0.967 7	48.90	0.043	0.982 7
NINs	32.13	3.312	0.959 6	0.872 6	162.224	0.958 7	32.10	0.301	0.973 1

吸附质 adsorbate	吸附量adsorption capacity/(mg·g^-1)
吸附质 adsorbate	10-DAB-MINs	NINs
10-DAB	37.08	17.98
巴卡亭Ⅲ Baccatine Ⅲ	17.49	13.11
紫杉醇paclitaxel	20.41	10.22

Preparation and Adsorption Properties of 10-DAB Molecular Imprinted Nanospheres

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