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Amino porous material and preparation method and application thereof

A porous material and amino technology, applied in the field of amino porous materials and its preparation, can solve the problems of a large number of oil droplets, pollution and consumption, and achieve the effects of fast adsorption rate, reduced water flux, and stable chemical structure

Inactive Publication Date: 2019-10-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, an amino porous material with high mechanical strength was successfully prepared by using the concentrated emulsion method using oil droplets as a template (publication number: CN109621918A).

Method used

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  • Amino porous material and preparation method and application thereof

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preparation example Construction

[0035]

[0036] The preparation method of amino porous material of the present invention comprises the following steps:

[0037] Put the hydrophilic rigid material in the container, compact it, and pour the polyethyleneimine solution into the container, so that the rigid material components are wetted and the gaps between the solids are filled with the polyethyleneimine solution components. Stir properly at the same time to fully discharge the air and fully wet the solid, then add the crosslinking agent solution and stir to mix evenly, heat and dehydrate with a vacuum water pump to volatilize the water in the gaps between the rigid material components, and make 90% of the system The above water is released, and the polyethyleneimine and the crosslinking agent are fully crosslinked on the surface of the rigid material to form a net-like sleeve on the solid surface, thereby forming a firm surface functional adsorption layer, that is, an amino porous material is obtained.

[00...

Embodiment 1

[0062] The preparation method of the amino porous material of this embodiment includes the following steps:

[0063] (1), microcrystalline cellulose (1.8g, particle size is 80μm) is added to branched polyethyleneimine (M n =60000, 0.05g / mL, 6mL) in the aqueous solution, stir, disperse, adjust the pH value to 11, add the water (1.5mL) solution of polyethylene glycol diglyceryl ether (molecular weight 2000, 1.44g), stir rapidly for 5min ; Stand still for 6 hours, vacuum dehydration with a water pump at 90°C, stop when the dehydration amount reaches 6.4g, and obtain an amino porous material, which is stored in a nitrogen environment, and its scanning electron microscope is as follows: figure 1 shown. The compression modulus tested by the electronic press is 31.6MPa, which is much higher than that of conventional plastic-based porous materials (typical value 3-6MPa), so its mechanical strength is high.

Embodiment 2

[0065] Same as Example 1, but using quartz sand (2.8g) instead of microcrystalline cellulose, the amino porous material was similarly obtained.

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Abstract

The invention provides an amino porous material and a preparation method and application thereof. The preparation method comprises the following steps: wetting a rigid material with a polyethyleneimine solution and filling and accumulating gaps of the rigid material; fully crosslinking by adding a crosslinking agent solution, or mixing the polyethylenimine solution with a crosslinking agent to obtain a mixture, and adding the rigid material into the mixture; then dewatering and drying by a water pump to volatilize water in the gaps; during dewatering, acting polyethyleneimine and the cross-linking agent to form a network which sleeves the surface of the rigid material component; and drying to obtain the amino porous material. The porous material can be directly used as a block material toadsorb various acid gases, organic acids, anionic direct dyes and reactive dyes, and can also be crushed and packed for use. Compared with the prior art, the amino porous material has the characteristics of green production, high mechanical strength, easiness in regeneration and the like.

Description

technical field [0001] The invention belongs to the technical field of material environmental protection and separation, and specifically relates to an amino porous material and its preparation method and application. Background technique [0002] At present, there are still many shortcomings in the use of adsorbents for environmental treatment and separation and purification, especially the adsorbents that can be greenly prepared, low-cost, easy to regenerate and reusable are still very scarce. [0003] Most of the macroporous materials have low mechanical strength and are easily brittle and broken into fine powder, which will cause secondary pollution, reduce the column flux, and increase the column pressure of the exchange column. In addition, in order to ensure sufficient adsorption strength, both electronic environment and topological environment design are usually required, but the electronic and topological environment design by post-functionalization on the surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J20/34C02F1/28B01D17/02B01D53/81B01D53/62B01D53/40C02F101/30C02F101/34C02F101/38
CPCB01D17/0202B01D53/40B01D53/62B01D53/81B01D2257/504B01J20/267B01J20/28011B01J20/3475C02F1/288C02F2101/301C02F2101/308C02F2101/34C02F2101/38C02F2101/40Y02C20/40
Inventor 万德成金明潘海燕
Owner TONGJI UNIV
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