A kind of porous cross-linked polyurea microsphere, its preparation method and application

A technology of cross-linked polyurea and microspheres, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of complex preparation process, waste gas and waste liquid pollution, etc., and achieve easy raw materials Good results, good repeatability and good monodispersity

Active Publication Date: 2020-04-24
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the preparation process of the existing porous polymer materials is complex and produces waste gas and waste liquid to pollute the environment, and further provides a preparation method of porous cross-linked polyurea microspheres with simple process and low production cost , Good repeatability, the prepared porous cross-linked polyurea microspheres have a microporous structure on the surface, good monodispersity, and can be widely used in wastewater adsorption treatment and other fields

Method used

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  • A kind of porous cross-linked polyurea microsphere, its preparation method and application
  • A kind of porous cross-linked polyurea microsphere, its preparation method and application
  • A kind of porous cross-linked polyurea microsphere, its preparation method and application

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preparation example Construction

[0032] The preparation method of porous cross-linked polyurea microsphere provided by the invention comprises the following steps:

[0033] Disperse monodisperse silica particles in a mixed solvent composed of acetone and water, stir with a glass rod and disperse ultrasonically for 12-17 minutes to obtain a uniformly dispersed silica dispersion;

[0034] Add pre-polymerized monomer isophorone diisocyanate (IPDI) to the silica dispersion, shake for 0.5-1.5min to make it evenly dispersed, and then react at 25-35°C for 0.8-1.2 hours before adding to the reaction The cross-linking agent triethylenetetramine (TETA) is added dropwise in the liquid, and after the addition is completed, fully react for 0.8-1.2 hours to obtain a solution containing porous cross-linked polyurea microspheres, which is centrifuged, and the filter residue is washed with acetone / water, that is Porous cross-linked polyurea microspheres.

[0035] The mass ratio of the monodisperse silica particles, acetone, ...

Embodiment 1

[0038] The porous cross-linked polyurea microspheres of this embodiment have a surface microporous structure, and the average pore diameter of the surface micropores is 0.3 μm.

[0039] The preparation method of above-mentioned porous cross-linked polyurea microspheres, comprises the following steps:

[0040] S1. Disperse 0.5 g of monodisperse silica particles with an average particle size of 375 nm in a mixed solvent composed of 66.5 g of acetone and 28.5 g of water, stir with a glass rod and disperse ultrasonically for 15 minutes to obtain a uniformly dispersed silica dispersion .

[0041] S2. Add 5 g of monomeric isophorone diisocyanate (IPDI) to the monodisperse silica dispersion, shake it for 1 minute to make it evenly dispersed, and then let it stand at 30° C. for 1 hour to react.

[0042] S3. Add 1.644 g of crosslinking agent triethylenetetramine TETA dropwise to the solution after 1 hour of reaction. After the dropwise addition, fully react for 1 hour to obtain a solu...

Embodiment 2

[0047] The porous cross-linked polyurea microspheres of this embodiment have a surface microporous structure, and the average pore diameter of the surface micropores is 0.3 μm.

[0048] The preparation method of the porous cross-linked polyurea microspheres of the present embodiment comprises the following steps:

[0049] S1. Disperse 1.2 g of monodisperse silica particles with an average particle size of 375 nm in a solvent composed of 66.5 g of acetone and 28.5 g of water, stir with a glass rod and disperse ultrasonically for 15 minutes to obtain a uniformly dispersed silica dispersion.

[0050] S2. Add 5 g of monomeric isophorone diisocyanate IPDI to the monodisperse silica dispersion, shake it for 1 minute to make it evenly dispersed, and then stand it at 30° C. for 1 hour to react.

[0051] S3. Add 1.644 g of crosslinking agent triethylenetetramine TETA dropwise to the solution after 1 hour of reaction. After the dropwise addition, fully react for 1 hour to obtain a solut...

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Abstract

The invention relates to a preparation method of a porous crosslinked polyurea microsphere. The method comprises the following steps: adding a prepolymer monomer into a silicon dioxide dispersion solution, uniformly dispersing, reacting for 0.8-1.2 hours under the condition at the temperature of 25-35 DEG C, then dropwise adding a crosslinking agent into a reaction solution and fully reacting for 0.8-1.2 hours to obtain a solution containing the porous crosslinked polyurea microsphere, carrying out centrifugal separation, and washing filter residue to obtain the porous crosslinked polyurea microsphere. The preparation method of the porous crosslinked polyurea microsphere has the advantages of simple process, low production cost and high repeatability; micropore structures are formed in the surface of the prepared porous crosslinked polyurea microsphere; the prepared porous crosslinked polyurea microsphere is high in monodispersity and can be widely applied to the fields such as wastewater adsorption treatment.

Description

technical field [0001] The present invention relates to the technical field of porous cross-linked polyurea microspheres, in particular to porous cross-linked polyurea microspheres with a surface microporous structure, and a method for preparing surface cross-linked polyurea microspheres with a microporous structure by a one-step method, and the microspheres Application of spheres in adsorbing dyes. Background technique [0002] With the development of dyes and related industries, organic pigment wastewater is a major problem in industrial treatment. The methods currently used to treat pigment production wastewater are mainly divided into biochemical methods and physicochemical methods. Adsorption is one of the important treatment methods. Commonly used adsorption materials are mainly porous materials with high specific surface area, such as activated carbon, molecular sieves and synthetic polymer materials. Polymer materials are favored by many types of pore structures, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/32C08J9/26C02F1/28C02F101/34C02F101/38
CPCC02F1/285C02F2101/308C02F2101/34C02F2101/38C02F2101/40C08G18/3228C08G18/755C08J9/26C08J2375/02
Inventor 丛海林于冰罗永丽
Owner QINGDAO UNIV
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