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Preparation method of super-hydrophobic sponge capable for efficient oil-water separation

A super-hydrophobic sponge, oil-water separation technology, applied in the field of sponge preparation, can solve the problems of difficult continuous separation, restricting practical and commercial applications, time-consuming and labor-intensive, etc.

Pending Publication Date: 2021-09-14
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These porous materials usually obtain rough surfaces on the scale of nanometer to micrometer to improve their hydrophobicity (Chem.Soc.Rev.2015,44,336-361). , airgel, steel mesh and fabric, most of the current work is focused on improving the oil absorption capacity, while ignoring the complex preparation process, expensive reagents and material transportation costs
In addition, oil recovery from absorbents is mainly through extrusion and distillation, (Energy Environ.Sci.2012,5,7908-7912; Adv.Funct.Mater.2012,22,4421-4425; .2012,51,5101-5105) which is time-consuming and laborious in large-area oil spill accidents, it is difficult to separate continuously, which seriously restricts their practical application and commercial application

Method used

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  • Preparation method of super-hydrophobic sponge capable for efficient oil-water separation
  • Preparation method of super-hydrophobic sponge capable for efficient oil-water separation
  • Preparation method of super-hydrophobic sponge capable for efficient oil-water separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] ① Mix 40 μL curing agent (Dow Corning 184-B solution) with 500 μL PDMS basic component (Dow Corning 184-A solution), stir for 3 minutes, and then dissolve to 50 mL of n-hexane and methanol with a volume ratio of 2:1. After shaking for 3 minutes, a PDMS dilution solution with a concentration of about 1% was obtained and set aside.

[0026] ②Dissolve 5.821g of cobalt nitrate hexahydrate into 40mL of water to obtain solution A for later use.

[0027] ③Sonically dissolve 2.053g of 1-methylimidazole into 50mL of methanol to obtain solution B for later use.

[0028] ④ Add the solution B obtained in step ③ to the solution A prepared in step ② under the condition of stirring, and continue to stir for 10 minutes, then centrifuge the product, wash it with ethanol for 3 times, and then shake and disperse it in ① to prepare The PDMS dilution, set aside.

[0029] ⑤Wash the commercially available melamine sponge (1 cubic centimeter) three times with ethanol and deionized water, dry...

Embodiment 2

[0031] ① Mix 50 μL curing agent (Dow Corning 184-B solution) with 500 μL PDMS basic component (Dow Corning 184-A solution), stir for 3 minutes, and then dissolve to 40 mL of n-hexane and methanol with a volume ratio of 1:1. After shaking for 3 minutes, a PDMS dilution solution with a concentration of about 1.36% was obtained and set aside.

[0032] ②Dissolve 3.835g of zinc nitrate hexahydrate into 30mL of water to obtain solution A for later use.

[0033] ③Sonically dissolve 7.088g of benzoimidazole into 60mL of ammonia water to obtain solution B for later use.

[0034] ④ Add the solution B obtained in step ③ to the solution A prepared in step ② under stirring condition, continue to stir for 10 minutes, then centrifuge the product, wash it with ethanol for 3 times, then shake and disperse it in ① to prepare The PDMS dilution, set aside.

[0035]⑤Wash the commercially available melamine sponge (1 cubic centimeter) three times with ethanol and deionized water, dry to constant ...

Embodiment 3

[0037] ① Mix 80 μL curing agent (Dow Corning 184-B solution) with 800 μL PDMS basic component (Dow Corning 184-A solution), stir for 3 minutes, and then dissolve to 50 mL of n-hexane and methanol with a volume ratio of 10:1. After shaking for 3 minutes, a PDMS dilution solution with a concentration of about 1.7% was obtained and set aside.

[0038] ②Dissolve 5.113g of zinc nitrate hexahydrate in 20mL of methanol to obtain solution A for later use.

[0039] ③Sonically dissolve 6.568g of 2-methylimidazole into 40mL of water to obtain solution B for later use.

[0040] ④ Add the solution B obtained in step ③ to the solution A prepared in step ② under the condition of stirring, and continue to stir for 10 minutes, then centrifuge the product, wash it with ethanol for 3 times, and then shake and disperse it in ① to prepare The PDMS dilution, set aside.

[0041] ⑤Wash the commercially available melamine sponge (1 cubic centimeter) three times with ethanol and deionized water, dry ...

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Abstract

The invention relates to a preparation method of a super-hydrophobic sponge for efficient oil-water separation. An organic ligand solution is added into a metal salt solution for reaction, a product is centrifugally separated, and the product is dispersed into a PDMS (Polydimethylsiloxane) diluent to form a dispersed immersion liquid, and the sponge is immersed in the immersion liquid, and the sponge is taken out and dried after complete immersion. A commercially available porous sponge is adopted as a matrix, a zeolite-like imidazole framework (ZIF) polymer which is low in cost, easy to obtain and excellent in performance is selected as a hydrophobic material, a unique adhesive polydimethylsiloxane (PDMS) component is adopted, and a metal organic framework polymer is constructed on the surface of the sponge matrix; and the preparation method of the material is simple and convenient, and the material has the characteristics of low density, low water absorption rate and high repeated utilization rate.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic three-dimensional sponge, in particular to a preparation method of a reusable, low-cost sponge that can be used for high-efficiency oil-water separation. Background technique [0002] The frequent occurrence of oil spill accidents and the increasingly serious industrial organic pollution have become serious environmental problems, posing long-term threats to human health and ecosystems. How to separate oil and toxic organic pollutants from water without further polluting the environment is a challenging subject. Traditional oil spill cleaning technologies include dispersants, curing agents, oil skimmers, booms, in-situ combustion, adsorbents, etc. Among them, porous adsorbents have the advantages of simplicity, low cost, and high efficiency, and have broad application prospects. Ideal porous adsorbents for oil-water separation should be hydrophobic and lipophilic to ensure that they c...

Claims

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Application Information

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IPC IPC(8): C08J9/42B01D17/022C08G83/00C08L61/28
CPCC08J9/42C08G83/008B01D17/0202C08J2361/28C08J2483/04C08J2487/00
Inventor 高倩何刚丁宗玲郭友敏
Owner ANHUI UNIVERSITY
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