Abstract:

Molecular imprinted polymers of 2,4-dichlorophenoxyacetic acid (2,4-D) were prepared in two methods which were compared in this thesis. 2,4-DMIPs and 2,4-DMIPMs were prepared by noumenon polymeric and suspension polymerization method respectively. The polymerization formula was optimized via orthogonal experiment. The orthogonal experiment results showed that the optimal preparation formula for DMIPs was as follows: 2,4-D 1.0 mmoL, MAA 4.0 mmoL, chloroform 4.0 mL, AIBN 20.0 mmoL, and that for DMIPS was as following conditions: 2,4-D 1.0 mmoL, MAA 8.0 mmoL, chloroform 8.0 mL, AIBN 10.0 mmoL. The absorption selectivty of the MIPs and MIPMs was studied by UV, and Scatchard analysis was performed. Scatchard analysis showed that the binding sites of equal class were formed in the MIPs and MIPMs under the concentration range studied. When 2,4-Dichlorophenol (2,4-DCP) and 2, 4-Dichlorobenzaldehyde (2,4-DCAD) were chosen as the competitive molecules, the separation factors for MIPs and MIPMs were 3.27, 3.15 and 3.78, 3.70 respectively. The rusults showed that: 2,4-DMIPMs had better adsorption and selective properties than 2,4-DMIPs in certain range. The MIPMs were expected to enrich and test 2,4-D in the environment and crops, and had a good application prospect.