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Open-cell polymer foam material for removing fluorine in water body as well as preparation method and an application thereof

A technology of foam materials and polymers, which is applied in the field of water defluoridation open-cell polymer foam materials and its preparation, which can solve the problems of secondary pollution and difficulty in recycling, etc., to prevent shedding, avoid secondary pollution, and maintain stable performance Effect

Active Publication Date: 2021-08-13
TG HILYTE ENVIRONMENTAL TECHNOLOGY (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common defluoridation adsorbents have problems such as difficult recovery and easy to cause secondary pollution.

Method used

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  • Open-cell polymer foam material for removing fluorine in water body as well as preparation method and an application thereof
  • Open-cell polymer foam material for removing fluorine in water body as well as preparation method and an application thereof
  • Open-cell polymer foam material for removing fluorine in water body as well as preparation method and an application thereof

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preparation example Construction

[0031] The present invention also provides a preparation method of open-cell polymer foam material for defluoridation of water body, comprising the following steps:

[0032] a) immerse the open-cell polyurethane foam in polyethyleneimine solution, and take it out to obtain PEI modified open-cell polyurethane foam;

[0033] b) immersing the PEI modified open-cell polyurethane foam in a mixed solution of nano-alumina-dopamine hydrochloride, taking it out and drying it to obtain an open-cell polymer foam material for defluoridation of water.

[0034] In the preparation method provided by the invention, firstly, the open-cell polyurethane foam is soaked in the polyethyleneimine solution. Wherein, the open-cell polyurethane foam is preferably a flexible foam, and the polyol molecular weight of the flexible foam is preferably controlled at 2000-300; the pore density of the open-cell polyurethane foam is preferably 10-100PPI, specifically 10PPI, 15PPI, 20PPI, 25PPI, 30PPI, 35PPI, 40...

Embodiment 1

[0047] An open-cell polymer foam material with the function of removing fluorine from water is prepared according to the following method:

[0048] (1) After cleaning the open-cell PU foam with a pore density of 10PPI, put it into a PEI aqueous solution with a number average molecular weight of 5000Da and a concentration of 1g / L, stir for 1h at room temperature, and rotate at a speed of 200r / min; after stirring , fished out and cleaned to obtain PEI modified open-cell PU foam;

[0049] (2) Prepare 10mM Tris (Tris) solution at room temperature, and adjust the pH value to 8.5 with 0.1mol / L HCl solution; 1g / L, add dopamine hydrochloride and nano-scale activated alumina (particle size 20nm) to the above-mentioned Tris-HCl buffer solution to obtain a mixed solution of nano-alumina-dopamine hydrochloride;

[0050] (3) Put the PEI modified open-cell PU foam prepared in step (1) into the mixed solution prepared in step (2), and stir magnetically for 6 hours at room temperature at a s...

Embodiment 2

[0057] An open-cell polymer foam material with the function of removing fluorine from water is prepared according to the following method:

[0058] (1) After cleaning the open-cell PU foam with a pore density of 50PPI, put it into the PEI aqueous solution with a number average molecular weight of 2000Da and a concentration of 1.5g / L, stir at room temperature for 0.5h, and rotate at 100r / min; After the end, remove and clean to obtain PEI modified open-cell PU foam;

[0059] (2) At room temperature, prepare 10mM Tris (Tris) solution, and adjust the pH value to 8.5 with 0.1mol / L HCl solution; Concentration of 1g / L, adding dopamine hydrochloride and nano-scale activated alumina (particle size 30nm) to the above-mentioned Tris-HCl buffer solution to obtain a mixed solution of nano-alumina-dopamine hydrochloride;

[0060] (3) Put the PEI modified open-cell PU foam prepared in step (1) into the mixed solution prepared in step (2), and stir magnetically for 6 hours at room temperatur...

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Abstract

The invention belongs to the technical field of organic materials, and particularly relates to an open-cell polymer foam material for removing fluorine in a water body as well as a preparation method and an application thereof. The open-cell polymer foam material provided by the invention is prepared by sequentially dipping open-cell polyurethane foam in a polyethyleneimine solution, dipping in a nano aluminum oxide-dopamine hydrochloride mixed solution and drying. The open-cell polymer foam is used as a medium, firstly, polyethyleneimine is used for improving wettability and hydrophilicity of the material, and then dopamine hydrochloride is used for endowing the material with underwater adhesion capacity, so that nano-scale activated aluminum oxide is effectively adhered. According to the invention, nano-scale active alumina with good adsorption and defluorination performance is adhered to a polymer material, so that the polymer material is endowed with a good function of defluorination in water, and the problem that a traditional small-particle water defluorination material is not easy to recover is solved; in addition, dopamine hydrochloride has a very strong adhesion function and can effectively prevent nano-particles from falling off, so that secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of organic materials, and in particular relates to an open-cell polymer foam material for defluoridation of water bodies, a preparation method and application thereof. Background technique [0002] Fluorine is one of the essential trace elements for the human body. Appropriate fluorine intake can promote human development; excessive intake of fluorine can cause serious diseases such as skeletal fluorosis and dental fluorosis, and cause harm to humans and animals, depending on Its intake and fluorine content in drinking water. The formation of fluoride pollution sources in water has both natural causes and human activities. On the one hand, since fluoride exists in several minerals, such as fluorspar, topaz, fluorite, cryolite, biotite, mica, citrine and other mineral composites, it can be filtered out by rainwater and pollute groundwater and surface water; On the other hand, wastewater discharged from vari...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/14
CPCB01J20/08B01J20/22B01J20/262B01J20/28045C02F1/288C02F2101/14
Inventor 王晓张建清张新波
Owner TG HILYTE ENVIRONMENTAL TECHNOLOGY (BEIJING) CO LTD
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