Study On Sudan I And Phenols Pollutant Molecularly Imprinted Polymer's Synthetic Methods And Characteristics

With the development of modern science and technology, more and more pollutant entered into the environmental, it is dangerous to the environmental and human's health, so the request that makes to environmental pollutant detection is increasable high. Molecular imprinting technology is a technique to prepare polymers with recognition site for given molecules, and has many good capabilities such as predetermination, recognition and practicability. It has been broadly applied to the detection of environmental pollutant in recent years.In this thesis, 2-chlorophenol (2-CP), sudan I and 2,4-dinitrophenol (2,4-DNP)were synthesized by bulk polymerization, precipitation polymerization and in site polymerization, respectively. Research on the recognition principium, synthetic conditions,and the effect to adsorption characteristics of molecularly imprinted polymers (MIPs). There are four chapters here:Chapter one: The development of Molecular imprinting technology, principle,polymerization methods of this technique were systematically introduced. And its applications in environmental pollutant detection were outlined.Chapter two: 2-CP imprinted polymers were prepared by bulk polymerization. Affinity and Static adsorption were employed to evaluate the MIPs. At last, 4-VP and toluene were used as functional monomer and porogenic solvent, respectively, the amount of the 2-CP was 4mmol. Under this optimal condition, the value of imprinted factor was 1.71. Scatchard analysis showed that the maximum surface adsorption quantity and equilibrium deseparation coefficient of MIP toward 2-CP were 0.1203 mmol/g and 1.4300 mmol/L, respectively. The imprinted polymers had higher adsorption efficiency and higher selectivity compared to the blank polymer which had the same chemical composition.Chapter three: Sudan I imprinted polymers were prepared by precipitation polymerization. Such as the ratio and volume of the porogenic solvent, the sorts of the functional monomers and the amount of template on the maximum absorption capacity and imprinted effect of the polymers were investigated. At last, the imprinted factor of the best Sudan I MIP was 2.32, the maximum surface adsorption quantity Bt =0.5007μmol/g, and equilibrium deseparation coefficient Kd =0.3890mmol/l.Chapter four: The 2,4-DNP molecularly imprinted polymers based monolithic capillary column were prepared by an in site polymerization. Several factors affecting the column performances in the preparation procedure were investigated and the chromatographic separation conditions were optimized. Under the optimal CEC conditions, the resolution of 2,4-DNP and 2-NP was 15. 36 on the 2,4-DNP MIP based monolithic column, while only 6.18 on the reference column without any imprint of 2,4-DNP. The imprinted factor of the best monolithic capillary column was 2.36. A rapid separation of 2, 4-DNP and 2-NP can be obtained within 11 min under optimized conditions.