A preparation method of cellulose hollow magnetically imprinted composite microsphere adsorbent

A composite microsphere and adsorbent technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as endocrine disorders, central nervous system paralysis, etc. Good separation and product rigidity

Inactive Publication Date: 2016-07-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Pyrethroid pesticides are widely used in agriculture, fishery, forestry and household insecticides due to their high insecticidal properties. Compared with organochlorine pesticides, pyrethroids have lower toxicity in organisms and relatively faster biotransformation and metabolism , but this kind of insecticide is absorbed through breathing or epidermis, which contains neurotoxins and can easily cause central nervous paralysis and endocrine disorders

Method used

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  • A preparation method of cellulose hollow magnetically imprinted composite microsphere adsorbent
  • A preparation method of cellulose hollow magnetically imprinted composite microsphere adsorbent

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Embodiment 1

[0038] 1. A method for preparing yeast magnetically imprinted composite microsphere adsorbent, characterized in that it is carried out according to the following steps:

[0039] (1) Fe 3 o 4 Preparation of nanoparticles and their hydrophobic modification:

[0040] 1gFeCl 3 ·6H 2 O and 0.5gFeCl 2 4H 2 O was dissolved in 50ml of deionized water, stirred at 20°C for 10min, 30ml of NaOH solution (concentration: 0.2mol / L) was quickly added to the above solution in a nitrogen atmosphere, and vigorously stirred for 10min. Generated Fe 3 o 4 After the nanoparticles were separated and recovered by a magnet, they were washed 3 times with absolute ethanol, dispersed in 40 ml of a mixture of oleic acid and absolute ethanol with a volume ratio of 1:1, and stirred for 3 h at 30°C. Washed 6 times with water and ethanol, and dried under vacuum at 40°C.

[0041] (2) Preparation of NCCs:

[0042] 1g of medical absorbent cotton was mixed with 60ml of 50% concentrated sulfuric acid sol...

Embodiment 2

[0054] 1. A method for preparing yeast magnetically imprinted composite microsphere adsorbent, characterized in that it is carried out according to the following steps:

[0055] (1) Fe 3 o 4 Preparation of nanoparticles and their hydrophobic modification:

[0056] 3gFeCl 3 ·6H 2 O and 1.5gFeCl 2 4H 2 O was dissolved in 100ml of deionized water, stirred at 50°C for 20min, 60ml of NaOH solution (concentration: 0.6mol / L) was quickly added to the above solution in a nitrogen atmosphere, and vigorously stirred for 30min. Generated Fe 3 o 4 After the nanoparticles were separated and recovered by a magnet, they were washed 3 times with absolute ethanol, dispersed in 40ml of a mixture of oleic acid and absolute ethanol with a volume ratio of 1:4, and stirred at 70°C for 8 hours. Washed 6 times with water and ethanol, and dried under vacuum at 40°C.

[0057] (2) Preparation of NCCs:

[0058] 3g of medical absorbent cotton was mixed with 100ml of 70% concentrated sulfuric aci...

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Abstract

The invention discloses a method for preparing a cellulose hollow magnetically imprinted composite microsphere adsorbent, which belongs to the technical field of preparation of environmental protection functional materials. Firstly, ferric iron tetroxide nanoparticles were prepared by co-precipitation method and its surface was hydrophobically modified. Nanocellulose was extracted from medical absorbent cotton by acid hydrolysis, and then NCCs aqueous solution was used as the external water phase, and the template molecule bifenthrin , functional monomer methacrylic acid, crosslinking agent ethylene glycol dimethacrylate, solvent toluene, initiator azobisisobutyronitrile, hydrophobic Fe 3 o 4 As the oil phase, deionized water as the inner water phase to prepare a Pickering double emulsion of water-in-oil-in-water, thermally induced polymerization to prepare cellulose hollow magnetically imprinted composite microsphere adsorbent, and the adsorbent is used for the selection of BF in the solution Sex recognition and adsorption. The results of the adsorption test show that the imprinted adsorbent prepared by the invention has better adsorption capacity, faster kinetic performance and selective recognition performance for BF.

Description

technical field [0001] The invention relates to a preparation method of a cellulose hollow magnetically imprinted composite microsphere adsorbent, which belongs to the technical field of preparation of environmental protection functional materials. Background technique [0002] Molecular imprinting technology (MIT) is a method of preparing polymers with specific recognition ability for a specific molecule. The prepared polymers are called molecularly imprinted polymers (MIPs), which are synthesized by cross-linking functional monomers in the presence of template molecules. The template is removed from the polymer under appropriate conditions to form imprinted holes that have the ability to recognize template molecules. Adsorbents prepared by MIT are generally highly selective and reusable. The application of magnetic separation technology to molecular imprinting is conducive to the rapid and simple separation of magnetic polymers from samples. Magnetic molecular imprinting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08F220/06C08F2/44C08K3/22C08J9/26
Inventor 李春香朱文静马威潘建明瞿琴甘梦颖
Owner JIANGSU UNIV
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