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Preparation method of waste paper based recoverable aerogel used for oil-water separation

A technology for oil-water separation and gas recovery, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve problems such as environmental pollution and waste of resources, and achieve the effects of simple preparation technology, cost saving, manpower and time saving

Active Publication Date: 2018-10-23
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment method is to convert it into new paper products for use, but after repeated recycling, waste paper is no longer suitable for making paper products, and can only be disposed of by landfill or incineration, which not only wastes resources waste and pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pretreatment of waste paper: Mechanically pulverize domestic waste paper, disperse it in a dilute hydrochloric acid solution with a concentration of 5 wt.% at a mass fraction of 1 wt.%, and let it stand for 24 hours. Filter and collect the precipitate, and rinse it with a large amount of deionized water until Neutral, the obtained precipitate was dried in an oven at 45°C for 5 hours to obtain treated waste paper, which was stored for future use.

Embodiment 2

[0018] Disperse the waste paper treated in Example 1 in deionized water with a mass fraction of 6%, form a uniform pulp after mechanical stirring for 20h, and add Fe that accounts for 20% and 10% of the waste paper mass fraction respectively 3 o 4 Nanoparticles (average particle size 10nm) and epichlorohydrin were stirred evenly, freeze-dried for 36 hours, and then placed in an oven at 60°C for 2 hours to obtain waste paper-based magnetic airgel; the airgel was impregnated in a concentration of pH 8.5 20 mg / L dopamine aqueous solution for 5 hours, take it out and dry it at room temperature, then immerse it in an ethanol solution with a mass fraction of 5% stearyl mercaptan for 12 hours, take it out and dry it at room temperature to obtain a magnetically recyclable waste paper base for oil-water separation. airgel. The water contact angle of the magnetic aerogel is 155°, and 0.5 g of the magnetic aerogel is placed in an oil-water mixture, and the saturation state can be reache...

Embodiment 3

[0020] Disperse the waste paper treated in Example 1 in deionized water with a mass fraction of 8%, form a uniform pulp after mechanical stirring for 20 hours, and add Fe which accounts for 20% and 10% of the waste paper mass fraction respectively 3 o 4 Nanoparticles (average particle size 10nm) and epichlorohydrin were stirred evenly, freeze-dried for 36 hours, and then placed in an oven at 60°C for 2 hours to obtain waste paper-based magnetic airgel; the airgel was impregnated in a concentration of pH 8.5 20 mg / L dopamine aqueous solution for 5 hours, take it out and dry it at room temperature, then immerse it in an ethanol solution with a mass fraction of 5% stearyl mercaptan for 12 hours, take it out and dry it at room temperature to obtain a magnetically recyclable waste paper base for oil-water separation. airgel. The water contact angle of the magnetic airgel is 152°. Putting 0.5g of the magnetic airgel in the oil-water mixture can reach saturation in 5 minutes, and th...

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Abstract

A preparation method of waste paper based recoverable aerogel used for oil-water separation comprises the following steps: crushing waste paper and dispersing in a diluted hydrochloric acid solution,filtering and collecting sediment and washing the sediment with deionized water to neutral level, and then drying the sediment for later use; dispersing the sediment in deionized water, stirring to form uniform paper pulp, adding Fe3O4 nanoparticles and chloropropylene oxide and uniformly stirring, freeze-drying, and treating by a drying oven to obtain waste paper based magnetic aerogel; impregnating the prepared aerogel in an ethanol solution of dopamine, taking out and drying at room temperature, then impregnating in a hydrophobic agent, and drying at room temperature to obtain the waste paper based recoverable aerogel used for oil-water separation. By using domestic waste paper fiber as the raw material for preparation of an oil-absorbing aerogel material, the risk of petrochemical resource shortage is alleviated, and a new approach is provided for high-value utilization of wastes.

Description

technical field [0001] The invention relates to the fields of chemical industry, biomass renewable materials and oil-water separation, in particular to a preparation method of waste paper-based recyclable airgel for oil-water separation. technical background [0002] Marine oil spills and organic pollutant spills occur frequently, and the leaked toxic substances have caused great harm to the marine ecological environment and human health. Traditional oil-water separation technologies mainly include flotation, gravity separation, centrifugation, filtration, etc., but most of the steps are cumbersome and take a long time. Moreover, these separation techniques usually rely on experience, and the phenomenon of incomplete oil-water separation often occurs, causing the oil to contain part of the water or the water to contain part of the oil. Therefore, it is imminent to develop new technologies and materials for oil-water separation. In recent years, a variety of porous materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D17/022
CPCB01D17/0202B01J20/24B01J20/28009B01J20/28047B01J20/3085
Inventor 尚倩倩周永红刘承果胡立红杨晓慧
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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