A kind of bisphenol substitution template semi-covalent molecularly imprinted mesoporous silicon material and preparation method and application thereof
A technology to replace templates and covalent molecules, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of template molecule leakage of imprinted materials, reduced selectivity of imprinted materials, poor compatibility with water phase of imprinted materials, etc. The effects of phase identification affinity, no risk of template leakage, and strong method applicability
Active Publication Date: 2021-10-26
LISHUI UNIV
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Problems solved by technology
[0004] At this stage, there are two main problems in the application of molecularly imprinted materials in solid phase extraction and DGT technology: ① Leakage of imprinted material template molecules
② Poor compatibility of imprinted materials with water phase
At the same time, other hydrophobic organic molecules in the aqueous phase can also be adsorbed through hydrophobic interactions, which greatly reduces the selectivity of imprinted materials.
Method used
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[0030] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.
[0031] Preparation and structural characterization of the surrogate template-monomer covalent complex in step (1):
[0032] Dissolve 3.1832g (10mmol) of phenolphthalein (PP) or 3.0636g (10mmol) of 1,1,1-tris(4-hydroxyphenyl)ethane (THPE) in 15mL of ultra-dry DMF solvent, stir to dissolve at room temperature and add 4.8 mL (20mmol) of isocyanate propyltriethoxysilane (ICPTES), sealed in a glass pressure-resistant reaction tube at 80°C for 48h. After the reaction, DMF was distilled off under reduced pressure at 80°C, and the obtained transparent viscous product was the substituted template-monomer covalent complex PP-ICPTES or THPE-ICPTES, which was sealed and stored under nitrogen gas.
[0033] A 300MHz nuclear magnetic resonance spectrometer was used to characterize the structure of the substituted template-monomer covalent complexes PP-ICPTES and...
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The invention discloses a semi-covalent molecularly imprinted mesoporous silicon material with a bisphenol substitute template and a preparation method and application thereof. The morphology of the material was characterized by nitrogen adsorption, scanning electron microscope and transmission electron microscope, and the selectivity and adsorption capacity of the material were evaluated by static adsorption. The results show that the bisphenol-based imprinted material provided by the present invention has high specific surface area, high class selectivity and high adsorption capacity, and can be used for bisphenol S, bisphenol F, bisphenol E, bisphenol A, bisphenol in water system. B. Bisphenol endocrine disruptors such as bisphenol AF, bisphenol AP and bisphenol Z can be identified with high selectivity, which are suitable for the enrichment and purification of bisphenols in the aqueous phase. The valence molecularly imprinted mesoporous silica material can be used for the highly selective enrichment and purification of bisphenols in complex matrices, without the risk of template leakage, and the results are reliable.
Description
technical field [0001] The invention relates to bisphenols substitute template semi-covalent molecularly imprinted mesoporous silicon material and its preparation method and application, belonging to the field of environmental monitoring and new materials. Background technique [0002] Bisphenol A (BPA), as a typical endocrine disruptor (EDCs), has been included in the list of priority pollutants by the United States, the European Union and other countries. Canada, China, etc. have also issued regulations prohibiting the use of bisphenol A in the production of infant food containers, and have made relevant regulations on the migration of BPA in food packaging materials, containers and coatings. With strict restrictions on the use of BPA by regulations, BPA structural analogues such as bisphenol S, bisphenol F, bisphenol E, bisphenol B, bisphenol AF, bisphenol AP, and bisphenol Z are widely used as substitutes for BPA. These alternatives have similar acute toxicity, genotoxi...
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IPC IPC(8): C08J9/26C08G77/26B01J20/26B01J20/30
CPCB01J20/268C08G77/26C08J9/26C08J2201/0422C08J2201/0424C08J2383/08
Inventor 孙晓丽王慕华杨甲甲纪律张燕
Owner LISHUI UNIV