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Spongy emergency adsorbing material and preparation method thereof

An adsorption material and sponge-like technology, which is applied in the field of sponge-like emergency adsorption materials and its preparation, achieves the effects of simple synthesis process steps, avoiding secondary pollution, and easy separation

Active Publication Date: 2013-12-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the limitation that the existing fibrous adsorption material needs to be fixed for the emergency treatment of the actual water body and is difficult to spread in a wide range, the present invention provides an emergency adsorption sponge and its preparation method, which adopts a simple and feasible method for polyvinyl alcohol (PVA) sponge was pretreated, and a new sponge-like emergency adsorption material containing hydroxamic acid structure was prepared through grafting reaction and nucleophilic substitution reaction of amine derivatives

Method used

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  • Spongy emergency adsorbing material and preparation method thereof
  • Spongy emergency adsorbing material and preparation method thereof
  • Spongy emergency adsorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of spongy emergency adsorption material its preparation method steps are:

[0034] (1) PVA sponge pretreatment

[0035] (a) Extraction: 5g of PVA sponge was extracted with 200mL of petroleum ether in a Soxhlet extractor for 11 hours, and dried at room temperature;

[0036] (b) Swelling: Place the dried PVA sponge in a three-necked flask, add 500 mL of distilled water to swell for 1 hour, and the swelling temperature is room temperature, and then pour out the water.

[0037] (2) Preparation of reactive emulsion

[0038] Mix 50mL of methyl acrylate, 4.5g of gelatin, and 450mL of distilled water, and stir thoroughly.

[0039] (3) Grafting reaction

[0040] Pour the reaction emulsion into a three-necked flask equipped with PVA sponge, add 1.5g of benzoyl peroxide, heat it in a water bath at 88°C, and stir and react at a speed of 60r / min for 11 hours, and carry out the solid-liquid reaction of the grafted sponge obtained by the reaction. After separation, washing ...

Embodiment 2

[0048] A kind of spongy emergency adsorption material its preparation method steps are:

[0049] (1) PVA pretreatment

[0050] (a) Extraction: 5g of PVA sponge was extracted with 200mL of benzene in a Soxhlet extractor for 9 hours, and dried at room temperature;

[0051] (b) Swelling: Place the dried PVA sponge in a three-necked flask, add 350 mL of distilled water to swell for 1.5 hours, and then pour off the water.

[0052] (2) Preparation of reactive emulsion

[0053] Mix 50mL of methyl acrylate, 3g of polyethylene wax, and 450mL of distilled water, and stir thoroughly.

[0054] (3) Grafting reaction

[0055] Pour the reaction emulsion into a three-necked flask equipped with PVA sponge, add 2g of azobisisobutyronitrile, heat in a water bath at 92°C, and stir and react at a speed of 60r / min for 9 hours. After separation, washing with acetone, and vacuum drying at 50°C, the grafting rate of the obtained grafted sponge was 298%, and the a value was 1.5.

[0056] (4) Nucle...

Embodiment 3

[0062] A kind of spongy emergency adsorption material its preparation method steps are:

[0063] (1) PVA pretreatment

[0064] (a) Extraction: 5g of PVA sponge was extracted with 200mL of petroleum ether in a Soxhlet extractor for 12 hours, and dried at room temperature;

[0065] (b) Swelling: Place the dried PVA sponge in a three-necked flask, add 400 mL of distilled water to swell for 1.5 hours, and then pour off the water.

[0066] (2) Preparation of reactive emulsion

[0067] Mix 55mL of methyl acrylate, 3g of polyvinyl alcohol, and 445mL of distilled water, and stir thoroughly.

[0068] (3) Grafting reaction

[0069] Pour the reaction emulsion into a three-necked flask equipped with PVA sponge, add 1.0mL of di-tert-butyl peroxide, heat in a water bath at 85°C, and stir and react at a speed of 60r / min for 12 hours, and solidify the grafted sponge obtained by the reaction. Liquid separation, washing with acetone, and vacuum drying at 50°C, the grafting rate of the obtai...

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Abstract

The invention discloses a spongy emergency adsorbing material and a preparation method thereof, and belongs to the field of environment material synthesis and application. Artificially-synthesized high molecular materials are adopted as a matrix, according to graft polymerization and a nucleophilic substitution reaction of amine derivatives, a polyvinyl alcohol sponge is used as a skeleton, a grafting reaction and modified synthesis are carried out on the surface, and the spongy emergency adsorbing material is obtained. The preparation method is simple and low in raw material price, the obtained spongy adsorbing material is large in toughness, is provided with pore passages and surfaces with the high hydrophilic performance and can rapidly and efficiently remove various heavy metal ions in water under the group action of the pore passages and the surfaces, the time for equilibrium adsorption of the heavy metal ions such as nickel, copper and lead is only about 10min, and the absorbed sponge is easily recycled and reused after being reproduced. The spongy emergency adsorbing material is particularly suitable for the emergency disposal of an emergency heavy metal water contamination accident which happens in natural water such as a riverway and a lake.

Description

Technical field: [0001] The invention discloses an emergency adsorption material and a preparation method thereof, more specifically a spongy emergency adsorption material and a preparation method thereof. Background technique: [0002] In recent years, sudden environmental pollution incidents have occurred frequently, especially water pollution incidents caused by heavy metal pollution. How to quickly and efficiently remove heavy metal ions in water has become a hot issue in the field of water pollution control research. Resin-based adsorbents based on polymer materials have the advantages of large adsorption capacity, adjustable structure, and easy regeneration, and are widely used in the field of wastewater treatment. However, the traditional granular resin has the following deficiencies in dealing with sudden water pollution accidents: 1) Granular resin needs to be in contact with the polluted water body in the adsorption column or mixing tank, and it is difficult to pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 王津南程澄杨欣陈晨
Owner NANJING UNIV
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