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Super-hydrophobic loofah sponge for separating oil and water and preparation method thereof

A technology of oil-water separation and loofah, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of complicated preparation process of super-hydrophobic sponge, and achieve good oil-water separation performance, easy availability of raw materials, and excellent mechanical strength. Effect

Active Publication Date: 2017-06-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthetic raw materials of artificial sponges are petroleum-based derivatives, which are non-renewable resources; in addition, the preparation process of superhydrophobic sponges is extremely complicated

Method used

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  • Super-hydrophobic loofah sponge for separating oil and water and preparation method thereof
  • Super-hydrophobic loofah sponge for separating oil and water and preparation method thereof
  • Super-hydrophobic loofah sponge for separating oil and water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Preparation of hydrophobically modified silica nanoparticles: in parts by mass, after mixing 5 parts of ammonia water and 25 parts of absolute ethanol evenly, add 5 parts of tetraethyl orthosilicate and 25 parts of anhydrous ethanol dropwise In the mixed solution of ethanol, heat to 30°C, stir and react for 5 hours; then, add 1 part of heptadecafluorodecyltrimethoxysilane to the reaction system, and continue the reaction for 10 hours; finally, wash the crude product at 80 Vacuum drying at ℃ for 4 hours to obtain hydrophobically modified silica nanoparticles;

[0033] 2) Preparation of superhydrophobic loofah: in parts by mass, disperse the silicon dioxide nanoparticles prepared above in 30 parts of ethyl acetate by ultrasonic method, add 10 parts of loofah, 10 parts of 1,6‐6 Methylene diisocyanate and 0.1 part of dibutyltin dilaurate were reacted at 70°C for 5 hours; then, the loofah was taken out and washed 3 times with 40 parts of ethyl acetate; finally, the loofah...

Embodiment 2

[0040]1) Preparation of hydrophobically modified silica nanoparticles: in parts by mass, after mixing 0.5 parts of ammonia water and 10 parts of absolute ethanol evenly, add 2 parts of tetraethyl orthosilicate and 10 parts of anhydrous ethanol dropwise In the mixed solution of ethanol, heat to 60°C, stir and react for 0.5 hours; then, add 0.5 parts of heptadecafluorodecyltrimethoxysilane to the reaction system, and continue the reaction for 1 hour; finally, wash the crude product and Vacuum drying at ℃ for 24 hours to obtain hydrophobically modified silica nanoparticles;

[0041] 2) Preparation of superhydrophobic loofah: in parts by mass, disperse the silicon dioxide nanoparticles prepared above with 20 parts of ethyl acetate by ultrasonic method, add 10 parts of loofah, 5 parts of 1,6‐6 Methylene diisocyanate and 0.05 parts of dibutyltin dilaurate were reacted at 50°C for 12 hours; then, the loofah was taken out and washed 3 times with 30 parts of ethyl acetate; finally, the...

Embodiment 3

[0044] 1) Preparation of hydrophobically modified silica nanoparticles: in parts by mass, after mixing 4 parts of ammonia water and 25 parts of methanol evenly, add dropwise to a mixed solution of 4 parts of ethyl orthosilicate and 25 parts of methanol , heated to 50°C, stirred and reacted for 3 hours; then, 0.7 parts of tridecafluorooctyltrimethoxysilane was added to the reaction system, and the reaction was continued for 6 hours; finally, the crude product was washed and dried in vacuum at 50°C After 12 hours, hydrophobically modified silica nanoparticles were obtained;

[0045] 2) Preparation of superhydrophobic loofah: in parts by mass, disperse the silicon dioxide nanoparticles prepared above with 30 parts of butyl acetate by ultrasonic method, add 10 parts of loofah, 6 parts of diphenylmethane- 4,4′‐diisocyanate and 0.1 part of catalyst were reacted at 60°C for 7 hours; then, the loofah was taken out and washed twice with 30 parts of butyl acetate; finally, the loofah wa...

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Abstract

The invention discloses a super-hydrophobic loofah sponge for separating oil and water and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing ammonia water and a first solvent, adding an obtained mixture into a mixed solution of ethyl orthosilicate and the first solvent dropwise, reacting to obtain silicon dioxide nanoparticles, and adding a fluorine-containing silane coupling agent for performing surface hydrophobic modification to obtain hydrophobic silicon dioxide nanoparticles; then, fixing the silicon dioxide nanoparticles being subjected to hydrophobic modification to the surface of a loofah sponge with polyisocyanate to obtain the super-hydrophobic loofah sponge. The super-hydrophobic loofah sponge for separating oil and water has the advantages that a synthetic process is simple and feasible, the raw materials are readily-available, a contact angle with water is 156 degrees, high oil-water separating performance is realized, and the oil-water separating efficiency is 98 percent or above.

Description

technical field [0001] The invention relates to a superhydrophobic material for oil-water separation, in particular to a superhydrophobic loofah for oil-water separation and a preparation method thereof. Background technique [0002] Materials with special wettability mainly include superhydrophobic, superhydrophilic, superoleophobic, superoleophilic and underwater superoleophobic materials, etc., which can be used in the field of oil-water separation. At present, a variety of oil-water separation materials with special wettability have been developed, such as metal mesh, sponge, fabric, etc. Among them, superhydrophobic sponges with a three-dimensional network structure have attracted much attention due to their high oil-water separation efficiency. So far, various synthetic superhydrophobic sponges (mainly carbon sponges, graphene sponges, melamine sponges, polyurethane sponges and polysiloxane sponges, etc.) have been developed rapidly. However, the synthetic raw materi...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/06C08K3/36C08G18/64B01D17/022
CPCB01D17/02C08G18/6492C08K3/36C08K9/06C08K2201/011C08L75/04
Inventor 李光吉易鹏林殷雷
Owner SOUTH CHINA UNIV OF TECH
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