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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, to achieve the effects of easy recycling, separation, and avoidance of secondary pollution

Active Publication Date: 2015-04-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 sponge-like emergency adsorption material and a preparation method thereof, and belongs to the field of environmental material synthesis and application. The present invention uses synthetic polymer materials as the matrix, through graft polymerization and nucleophilic substitution reaction of amine derivatives, that is, polyvinyl alcohol sponge is used as the skeleton, and the surface is synthesized through graft reaction and modification to prepare a sponge-like emergency adsorption material. . The preparation method is simple and the raw materials are cheap. The prepared sponge adsorption material has high toughness, highly hydrophilic pores and surfaces, and can quickly and efficiently remove a variety of heavy metal ions in the water through the group interaction of the pores and surface. The equilibrium adsorption time of heavy metal ions such as copper and lead is only about 10 minutes, and the adsorbed sponge is easy to recycle and can be regenerated and reused. It is especially suitable for emergency response to sudden heavy metal water pollution incidents in natural water bodies such as rivers and lakes.

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 Patents(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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