Methyl-p-hydroxy benzoate surface imprinting absorbent as well as preparation method and application thereof

A methylparaben, surface imprinting technology, applied in chemical instruments and methods, non-metallic elements, other chemical processes, etc., can solve problems such as skin and mucous membrane inflammation, epidermal cell destruction, gastrointestinal discomfort, etc., and achieve high adsorption capacity. , reducing non-specific adsorption, high selectivity

Inactive Publication Date: 2014-03-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of wintergreen oil is often accompanied by impurities methyl paraben (methyl paraben). Some data show that methyl paraben is used as a preservative. If you eat food added with methyl paraben for a long time, it may cause Cause gastrointestinal discomfort, skin and mucous membrane inflammation; if it exists in cosmetics, long-term repeated use will cause skin allergies, strengthen the damage of ultraviolet rays to the DNA of epidermal cells, and cause cancer in severe cases

Method used

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  • Methyl-p-hydroxy benzoate surface imprinting absorbent as well as preparation method and application thereof
  • Methyl-p-hydroxy benzoate surface imprinting absorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Synthesis of monodisperse silica nanoparticles

[0043] Add 4.45 mL tetraethyl orthosilicate (TEOS), 9.0 mL H 2 O, 48.95 mL of ammonia water with a concentration of 7.0 mol / L, and 37.6 mL of absolute ethanol were stirred at room temperature (25°C) for 4 to 5 hours; the reaction product was washed with distilled water until neutral, and dried under vacuum at 60°C.

[0044] (2) Methylparaben imprinted polymer (MIP MP ) preparation

[0045]200 mg of monodisperse silica nanoparticles were added to 15 mL of methanol for ultrasonic dispersion for 5 min, followed by 1.0 mmol of methylparaben (MP), 5 mmol of 3-aminopropyltriethoxysilane (APTES ), added to the above suspension to make the template molecules react with functional monomers to form a pre-assembled system, then add 2.0 mL tetraethyl orthosilicate (TEOS) and 0.5 mL 1mol / L acetic acid to the suspension, Stir at room temperature (25°C) for 24 h; then centrifuge and dry under vacuum at 60°C for 12 h; the synthesi...

Embodiment 2

[0053] (1) Synthesis of silica nanoparticles

[0054] Add 4.05 mL tetraethyl orthosilicate (TEOS), 9.0 mL H 2 O, 48.95 mL of ammonia water with a concentration of 7.0 mol / L, 38.0 mL of absolute ethanol, stirred at room temperature (25 °C) for 4 to 5 hours; the reaction product was washed with distilled water until neutral, and dried under vacuum at 60 °C.

[0055] (2) Methylparaben imprinted polymer (MIP MP ) preparation

[0056] Add 400 mg of monodisperse silica nanoparticles into 30 mL of methanol and ultrasonically disperse for 5 min, then add 2.0 mmol of methylparaben (MP), 10 mmol of 3-aminopropyltriethoxysilane (APTES ), added to the above suspension to make template molecules react with functional monomers to form a pre-assembled system, then add 4 mL tetraethyl orthosilicate (TEOS) to the above mixture, 1 mL 1mol / L acetic acid in the suspension, Stir at room temperature for 18 h; then centrifuge and dry in vacuum at 60 °C for 16 h; the synthesized polymer was washed...

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Abstract

The invention discloses a methyl-p-hydroxy benzoate surface imprinting absorbent as well as a preparation method and an application of the methyl-p-hydroxy benzoate surface imprinting absorbent, which belongs to the technical field of environmental material preparation. The preparation method disclosed by the invention comprises the steps of: forming a preassembling system by using synthetic monodisperse silicon dioxide nano microballoons as a substrate, methyl-p-hydroxy benzoate as template molecules and 3-aminopropyltriethoxysilane as a functional monomer; then adding tetraethyl orthosilicate as a crosslinking agent and acetic acid as a catalyst to obtain a colloid absorbent body; and finally eluting the template molecules for the absorbent body and washing the absorbent body as neutral, and vacuumizing and drying to obtain the methyl-p-hydroxy benzoate surface imprinting absorbent. As imprinting occurs on the surface of the substrate material of silicon dioxide nano particles, the problem that part of the template molecules due to over-deep embedment cannot be eluted is solved. The imprinting absorbent obtained by the method has high mechanical strength, the identification point is not easy to damage, the non-special absorption is reduced, and the imprinting absorbent has the advantages of high selectivity to methyl-p-hydroxy benzoate, remarkable separation effect, and repeated use, and is expected to provide the novel methyl-p-hydroxy benzoate absorbent for purification of industrialized production of wintergreen oil.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to a method for preparing a novel adsorbent for removing methylparaben from wintergreen oil, in particular to a methylparaben surface imprinted adsorbent and its preparation method and application. Background technique [0002] Molecular imprinting technology (MIT) is to simulate the molecular recognition in nature, such as: enzymes and substrates, antibodies and antigens, etc., using target molecules as template molecules to prepare polymers with specific and selective recognition functions for the molecules ( A technology of Molecularly Imprinted Polymers (MIPs)—that is, select functional monomers that can have specific interactions with template molecules, polymerize with cross-linking agents around the template molecules to form a three-dimensional cross-linked polymer network, and finally pass The template molecules are removed by physical and chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30
Inventor 孟敏佳潘建明戴江栋杭辉卫潇闫永胜
Owner JIANGSU UNIV
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