Preparation method for sponge material with adsorption, separation, filtering and purification function

A technology of filtration purification and adsorption separation, which is applied in chemical instruments and methods, filtration treatment, adsorption water/sewage treatment, etc., to achieve the effects of energy saving, simple preparation process and high removal efficiency

Inactive Publication Date: 2018-05-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining the high adsorption performance of graphene oxide with the advantages of polyvinyl alcohol sponge being porous, hydrophilic, and solvent-resistant, it also makes up for the shortcomings of graphene oxide that are not easy to separate from water, and prepares a kind of organic dyes and heavy metal ions in water. Sponge material with adsorption, separation, filtration and purification of chemical substances

Method used

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  • Preparation method for sponge material with adsorption, separation, filtering and purification function
  • Preparation method for sponge material with adsorption, separation, filtering and purification function
  • Preparation method for sponge material with adsorption, separation, filtering and purification function

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of polyvinyl alcohol solution: weigh 6g of 2699-type PVA particles, dissolve in 54g of water in a boiling water bath, and fully stir for 60min until the solution is transparent;

[0032] (2) Preparation of precursor: Weigh 0.8g of graphene oxide powder, add to the above dissolved PVA solution, add 10g of soluble starch, and stir well at room temperature. The temperature of the system was raised to 50°C, and 10 g of sulfuric acid aqueous solution with a mass fraction of 50% and 12 g of formaldehyde were respectively added, and stirred for 5 min;

[0033] (3) Curing and molding of the composite sponge: pour the obtained sol into a mold, and place it in a 60°C oven for curing for 3 hours;

[0034] (4) Cleaning and drying of the composite sponge: take it out from the mold, rinse it with a large amount of clear water, and dry it in a freeze dryer to obtain the adsorption sponge material.

Embodiment 2

[0036] Adjust the amount of graphene oxide powder in the step (2) of embodiment 1 to 0.4g, and the rest are the same as in embodiment 1 to obtain the adsorption sponge material.

Embodiment 3

[0038] Adjust the amount of graphene oxide powder in step (2) of embodiment 1 to 1.2g, and the rest are the same as in embodiment 1 to obtain the adsorption sponge material.

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Abstract

The invention provides a preparation method for a sponge material with an adsorption, separation, filtering and purification function for chemical substances including organic dyes, heavy metal ions and the like in water. The preparation method comprises the following steps: (1) accurately weighting polyvinyl alcohol, and dissolving the polyvinyl alcohol into deionized water at a certain mass ratio, and evenly stirring; (2) adding graphene oxide, a foaming agent, a cross-linking agent and a catalyst into polyvinyl alcohol solution, and stirring for certain time after one reagent is added to evenly disperse the reagent; (3) transferring a precursor into a die, and heating and solidifying for forming; (4) cleaning a formed compound sponge with water for multiple times, and drying to obtain the dried sponge material. The preparation method has the advantages of simple process, low cost and wide applicable range. The obtained sponge material is porous, hydrophilic and resistant to solvent,has a high adsorption rate and high removal efficiency for the organic dyes and heavy metal ions, and does not need additional energy consumption, and the sponge material can be desorbed, cleaned andutilized after pollutants are adsorbed and is suitable for industrial wastewater processing and household water filters.

Description

technical field [0001] The invention relates to the field of special functional materials, in particular to a method for preparing a sponge material capable of absorbing, separating, filtering and purifying chemical substances such as organic dyes and heavy metal ions in water. technical background [0002] Water is the source of human life. However, the development of sewage treatment technology has failed to keep up with the continuous spread of water pollution, and mankind is facing the dilemma of increasing shortage of available water resources. To solve this dilemma, the first thing to solve is the chief culprit of water pollution-industrial wastewater. The main pollutants in industrial wastewater include various heavy metal ions and organic dyes. For these pollutants, the current common treatment methods mainly include membrane separation, chemical degradation, photocatalysis, and adsorption purification. Among them, the adsorption purification method is widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/30C02F1/00C02F1/28C02F101/30C02F101/20C08L29/04
CPCC02F1/001C02F1/285C02F2101/20C02F2101/308C08J9/0033C08J9/0066C08J9/30C08J2329/04
Inventor 李先锋刘韬李青
Owner TIANJIN POLYTECHNIC UNIV
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