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Citation: HAN Yong-Ping, LIN Qiang, WANG Chang. Preparation of Stigmasterol Molecular Imprinting Polymeric Microspheres by Suspension Polymerization[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 556-559. shu

Preparation of Stigmasterol Molecular Imprinting Polymeric Microspheres by Suspension Polymerization

1.
a College of Bio-chemical Engineering Beijing Union University, Beijing 100023;
2.
b China University of Mining and Technology, Beijing

Corresponding author: LIN Qiang,
Received Date: 10 May 2007
Available Online: 26 October 2007
Fund Project: 北京市教委项目(KM200511417005) (KM200511417005)

The molecular imprinting polymeric microspheres (MIPs) of stignmasterol were prepared by suspension polymerization,with stignmasterol as the printing molecule,methyl methacrylate (MMA) and methacrylic acid (MAA) as the functional monomers,vinyl benzene (VB) as the cross-linker,CaCO₃ and SDS as the dispersants,and Na₂S₂O₈ as the initiator.The average diameter was below 100 μm and the size distribution was narrow.The experiment results showed that the optimal recipe was 3 g stig.:40 mL MMA or 30 mL MMA+10 mL MAA:15 mL VB:4 g CaCO₃+2 g SDS.During the polymerization Na₂S₂O₈ was added batchwise,and in the early period a high speed stirring was applied,and with the going of the polymerization,the stirring rate was reduced.With a separation factor of over 1.65 and an adsorption capacity of 1.28 mg/g,the prepared MIPs had a strong selective adsorption toward stigmasterol.
- molecular imprinting polymer,
- stigmasterol,
- adsorption capacity,
- selective adsorption
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