Citation: SONG Junjie, GONG Mengting, TIAN Haixi, LI Hui, HUANG Xinhui, ZOU Lingmin, WEI Yongqing. Preparation of Novel Molecularly Imprinted Microsphere by Using 2-Isopentyl Cyclopentanone as the Dummy Template and Its Adsorption Behavior[J]. Chinese Journal of Applied Chemistry, ;2019, 36(11): 1333-1342. doi: 10.11944/j.issn.1000-0518.2019.11.190127 shu

Preparation of Novel Molecularly Imprinted Microsphere by Using 2-Isopentyl Cyclopentanone as the Dummy Template and Its Adsorption Behavior

a.
College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hu'nan 416000, China
b.
National and Local United Engineering Laboratory of Integrative Utilization of Eucommia ulmoides, Jishou University, Jishou, Hu'nan 416000, China

Corresponding author: LI Hui, lihuijsdx@163.com
Received Date: 3 May 2019
Revised Date: 26 June 2019
Accepted Date: 15 August 2019

Fund Project: the National Natural Science Foundation of China 21865011Supported by the National Natural Science Foundation of China(No.21865011), the National Natural Science Foundation of Hunan Province(No.2018JJ2310), the Innovation Platform Open Fund of Hunan Province(No.16K071), and the Jishou University Innovation Fund for Graduate Students(No.Jdy22)the Jishou University Innovation Fund for Graduate Students Jdy22the Innovation Platform Open Fund of Hunan Province 16K071the National Natural Science Foundation of Hunan Province 2018JJ2310

Figures(10)

Novel molecularly imprinted polymer (MIP) microspheres were prepared by the precipitation polymerization method using 2-isopentyl cyclopentanone as the dummy template. The surface chemical groups were characterized by Fourier transform infrared spectroscopy (FTIR) and the particle size distribution was characterized by scanning electronic microscope (SEM). Adsorption dynamics, isotherm adsorption behavior and application capacity for this MIP in solid phase extraction of rose oxide were explored. The results indicated that MIPs could reach adsorption equilibrium within 25 min, showing a rapid adsorption dynamics, and the first order model was better to describe its adsorption dynamics behavior. Additionally, the Freundlich isotherm model was more suitable to describe the isotherm adsorption behavior and a maximum binding site number (149.3 μmol/g) was obtained by fitting the isotherm data to the Langmuir model. A mean adsorption potential energy of 166.7 kJ/mol indicated a chemical adsorption process for MIPs. The selectivity factor for MIPs toward rose oxide relative to geraniol and citronellol was 3.710 and 5.636, respectively. Especially, this MIP possessed higher competitive adsorption capacity toward rose oxide in the mixture, with an adsorption capacity of 18.03 mg/g. Under the optimized solid phase extraction conditions, i.e., washing by using 1 mL acetonitrile, 1 mL acetonitrile-water mixture(volume ratio 9.5:0.5) and 2 mL acetonitrile-methanol-water mixture (volume ratio 8:1:2) and eluting by using 3 mL methanol-acetic acid mixture(volume ratio 9:1), rose oxide can be separated and enriched from crude rose extract by using molecularly imprinted polymeric solid phase extraction, with a recovery of 96.23%.
- dummy template imprint,
- molecularly imprinted microsphere,
- rose oxide,
- adsorption,
- extraction
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沈阳化工大学材料科学与工程学院沈阳 110142