A kind of preparation method of modified airgel for sewage treatment

A technology for sewage treatment and aerogel, which is applied in aerogel preparation, water/sewage treatment, adsorbed water/sewage treatment, etc. The effect of ensuring adsorption performance and improving adsorption performance

Inactive Publication Date: 2021-01-26
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional inorganic aerogels have light density and excellent three-dimensional network structure, but their expansion properties are poor and their efficiency is not high, which is not conducive to the use of adsorption materials; while organic aerogels have excellent adsorption properties and not only have high adsorption performance, it can still be reused after adsorption, after the organic airgel is modified, its hydrophobicity, mechanical properties, and adsorption performance have been substantially improved

Method used

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  • A kind of preparation method of modified airgel for sewage treatment

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Embodiment 1

[0028] A modified airgel for sewage treatment, the preparation of which comprises the following steps:

[0029] (1) Soak the low-cross-linked polystyrene with a cross-linking degree of 10% in absolute ethanol for 48 hours, take out the low-cross-linked polystyrene and let it dry naturally at room temperature, and dry the air-dried low-cross-linked polystyrene Place 10 parts by weight of high-degree polystyrene and 1 part by weight of tetrabutyl titanate in a mixed solution of methylene chloride and carbon tetrachloride, heat and stir for 12 hours, and lower the temperature to room temperature after the low-crosslinking degree polystyrene is completely dissolved. , to obtain the airgel precursor; place the airgel precursor in a high-pressure airtight device, pressurize and raise the temperature to 50°C, and keep it for 10 hours. Linked polystyrene airgel;

[0030] (2) In parts by weight, uniformly mix the raw materials comprising 20 parts of silicon dioxide, 8 parts of bentoni...

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Abstract

The invention provides a method for preparing modified airgel for sewage treatment. The invention uses polystyrene with a low degree of crosslinking as the airgel matrix, and adds a certain amount of tetrabutyl titanate during the dissolution process. Afterwards, it was sprayed with silica, bentonite, polydopamine, vinyltriethoxysilane and benzyl alcohol, and an excellent adsorption effect was achieved. Experimental results show that, for the sewage rich in oil, the modified airgel prepared by the method of the present invention has excellent treatment capacity, and the modified airgel prepared by the present invention has remarkable adsorption effect in sewage, which promotes Application of polystyrene airgel in the field of water treatment.

Description

technical field [0001] The invention relates to the field of sewage treatment materials, in particular to a preparation method of modified airgel for sewage treatment. Background technique [0002] In recent years, a large number of organic and inorganic pollutants in the industry have been discharged into water resources. Most of the polluted water resources come from industrial and agricultural activities. With the increasing frequency of human activities, the pollution has become more and more serious. When the adsorption method is used to treat polluted water resources, since the adsorption usually utilizes intermolecular force, that is, van der Waals force, electrostatic interaction, hydrophilic or hydrophobic force, to adsorb on the surface of the adsorbent material and further diffuse into the interior, the adsorbent material itself is more It is a porous material with high porosity. It is divided into organic adsorption materials and inorganic adsorption materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00B01J20/28B01J20/30C02F1/28
CPCB01J13/0091B01J20/28047C02F1/285
Inventor 苏彩丽
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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