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Hydrophilic oleophobic sponge as well as preparation method and application thereof

A hydrophilic and oleophobic sponge technology is applied in the field of hydrophilic and oleophobic sponges and their preparation, and can solve the problems of reducing the oil-water separation ability of lipophilic and hydrophobic sponges, blocking pores with organic pollutants, and the like

Inactive Publication Date: 2019-07-19
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the density of most oil stains is lower than that of water, water will sink to the bottom but oil stains will float on the water surface, and the lipophilic properties of sponges can easily lead to clogging of pores by organic pollutants after long-term use, thus reducing the affinity of the sponge. Oil-Water Separation Ability of Oil-Hydrophobic Sponge

Method used

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  • Hydrophilic oleophobic sponge as well as preparation method and application thereof
  • Hydrophilic oleophobic sponge as well as preparation method and application thereof
  • Hydrophilic oleophobic sponge as well as preparation method and application thereof

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preparation example Construction

[0027] The invention provides a kind of preparation method of hydrophilic oleophobic sponge, comprises the following steps:

[0028] The nanoparticle suspension is mixed with the modifying agent solution to obtain a modified solution; the nanoparticle suspension includes a nanometer ferric oxide suspension and / or an ethanol suspension of nanometer silicon dioxide coated with silicon dioxide on the surface; Described modifying agent solution is chitosan acetic acid aqueous solution and polyvinyl alcohol aqueous solution;

[0029] After the sponge is immersed in the modification solution, it is mixed with glutaraldehyde aqueous solution to carry out cross-linking reaction to obtain the hydrophilic and oleophobic sponge.

[0030] The nanoparticle suspension is mixed with the modifying agent solution to obtain a modified solution; the nanoparticle suspension includes a nanometer ferric oxide suspension and / or an ethanol suspension of nanometer silicon dioxide coated with silicon d...

Embodiment 1

[0072] (1) 1.623g FeCl 3 ·6H 2 O with 0.597g FeCl 2 4H 2 Dissolve O in 30mL of deionized water, and stir for 30min at 60°C under nitrogen protection; then add 26g of sodium hydroxide aqueous solution (sodium hydroxide 1g, water 25g), then add 0.125g of trisodium citrate, and the temperature rises to 80°C , stirred and reacted for 1 hour; after the reaction was completed, cool to room temperature to obtain hydrophilic ferric iron tetroxide particles, perform magnetic separation and wash 6 times with deionized water, and then add 50 mL of deionized water to prepare hydrophilic triferrous oxide particles Iron particle suspension; add 4mL ammonia water (concentration: 25wt%) to the above suspension, stir for 5min, then add 0.25mL tetraethoxysilane, and then react for 12h under nitrogen protection at room temperature; the reaction is completed to obtain surface-coated silicon dioxide The ferric oxide particles were magnetically separated and washed 6 times with deionized water, ...

Embodiment 2

[0078] (1) Same as Step 1 of Embodiment 1.

[0079] (2) Weigh 0.4 g of chitosan and dissolve it in 1 wt % acetic acid solution, stir at room temperature for 4 h to obtain 40 mL of chitosan acetic acid aqueous solution.

[0080] (3) Weigh 0.4 g of polyvinyl alcohol and add it into deionized water, and stir at 50° C. for 2 hours to obtain 12 mL of polyvinyl alcohol aqueous solution.

[0081] (4) Add 45mL ferric oxide suspension coated with silica on the surface and 40mL chitosan acetic acid aqueous solution into a round bottom flask, stir for 3 minutes, then add 12mL polyvinyl alcohol aqueous solution, stir for 5 minutes, and then put 6 pieces of dense Soak the amine sponge (4cm×2.5cm×0.7cm) in the above mixed solution, stir for 15min, add 0.075mL glutaraldehyde aqueous solution, stir for 12h, finally take out the sponge from the mixed solution and directly dry it in vacuum at 60°C for 24h, A hydrophilic and oleophobic sponge is obtained. Gained modified sponge is 154 degree t...

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Abstract

The invention provides hydrophilic oleophobic sponge as well as a preparation method and application thereof, and belongs to the technical field of preparation of functional materials. The preparationmethod comprises the following steps: mixing a nanoparticle suspension with a modifier solution to obtain a modification solution, wherein the nanoparticle suspension comprises a nano ferroferric oxide suspension with the surface coated with silicon dioxide and / or an ethanol suspension of nano silicon dioxide, and the modifier solution is a chitosan acetic acid aqueous solution and a polyvinyl alcohol aqueous solution; immersing sponge in the modification solution, mixing the sponge with a glutaraldehyde aqueous solution for a cross-linking reaction to obtain the hydrophilic oleophobic sponge. Therefore, the sponge has good oil-water separation performance, and a heavier water layer can be effectively separated from an oil-water mixture of light oil such as lubricating oil, engine oil, pump oil, crude oil, gasoline and sunflower seed oil simply through gravity driving. The prepared hydrophilic oleophobic sponge has a good application prospect in oil-water separation.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a hydrophilic and oleophobic sponge and its preparation method and application. Background technique [0002] At present, the inadvertent leakage and arbitrary discharge of a large amount of oil pollution has caused a serious threat to the living environment of human beings and their own health. People have been committed to seeking a time-saving, labor-saving, easy-to-operate, and low-cost degreasing method. Recent studies have shown that lipophilic and hydrophobic materials are a better choice. In particular, loose and porous lipophilic and hydrophobic sponge materials can block water penetration while having good adsorption and penetration capabilities for oil stains and organic solvents, and can remove heavy oil layers (organic solvent layers) only under the action of gravity. Separation from the lighter water layer saves a lot of time, manpower,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/42B01D17/022C08L61/28C08L75/04
CPCC08J9/40C08J9/42B01D17/0202C08J2361/28C08J2375/04B01D17/10C08J2405/08C08J2429/04C08J2201/038
Inventor 何富安何文旭林博李德豪黎增田陈婉怡
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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