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Superhydrophobic and superlipophilic sponge as well as preparation method and application of superhydrophobic and superlipophilic sponge

A super-oleophilic and super-hydrophobic technology, applied in the direction of separation methods, chemical instruments and methods, grease/oily substances/suspton removal devices, etc., can solve the problems of cumbersome preparation process and decreased oil absorption capacity, and achieve simple preparation process, Not easy to fall off, good adhesion effect

Inactive Publication Date: 2014-05-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is cumbersome and requires secondary coating, and the oil absorption capacity of the material will still decrease to a certain extent after repeated use

Method used

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  • Superhydrophobic and superlipophilic sponge as well as preparation method and application of superhydrophobic and superlipophilic sponge
  • Superhydrophobic and superlipophilic sponge as well as preparation method and application of superhydrophobic and superlipophilic sponge
  • Superhydrophobic and superlipophilic sponge as well as preparation method and application of superhydrophobic and superlipophilic sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Synthesis of polyacrylate emulsion: Add 15g methyl methacrylate, 25g butyl acrylate, 0.7g acrylic acid, 1.4g hydroxypropyl acrylate, 1.3g allyloxynonylphenol polyoxyethylene to a 250mL beaker Ether (10) ammonium sulfate and 44 g of distilled water were stirred at a high speed for 15 minutes at a stirring rate of 3000 r / min to obtain an acrylate pre-emulsion. 0.4 g of potassium persulfate was dissolved in 5 g of distilled water to obtain an aqueous initiator solution. Add 25ml of distilled water into a four-necked flask equipped with a thermometer, a stirring paddle, a condenser and a constant pressure funnel, heat it to 80°C in a constant temperature water bath, and slowly add the above-mentioned acrylate pre-emulsion and initiator aqueous solution to four In the flask, the dropwise addition time is 2h, and the reaction is continued for 1h after the dropwise addition is completed to obtain a polyacrylate emulsion.

[0030] (2) Synthesis of fluorine-containing polya...

Embodiment 2

[0041] The difference between this example and Example 1 is that the amount of dodecafluoroheptyl methacrylate in step (2) is changed to 6g, and the amount of silicon dioxide in step (3) is changed to 0.6g to obtain superhydrophobic and superphilic Oil sponge, the gasoline used in step (4) is changed to n-hexane.

[0042] SEM photographs of the obtained superhydrophobic and superoleophilic sponges and figure 2 Similar; the contact angle tester (DSA100, Germany) test shows that the prepared superhydrophobic and superoleophilic sponge and water contact angle are 148.8 °, and the contact angle with n-hexane is 0 °, and the sponge of this embodiment can quickly and effectively remove water / The oil absorption capacity of n-hexane in the n-hexane mixture is 27g / g, and the oil absorption capacity is basically unchanged after repeated use.

Embodiment 3

[0044] (1) Synthesis of polyacrylate emulsion: Add 15g styrene, 25g isooctyl acrylate, 1.6g methacrylic acid, 2.4g hydroxyethyl acrylate, 1.5g allyloxynonylphenol polyoxyethylene to a 250mL beaker Ether (10) ammonium sulfate and 55 g of distilled water were stirred at a high speed for 15 minutes at a stirring rate of 2500 r / min to obtain an acrylate pre-emulsion. 0.3 g of ammonium persulfate was dissolved in 10 g of distilled water to obtain an aqueous initiator solution. Add 40g of distilled water into a four-necked flask equipped with a thermometer, stirring paddle, condenser and constant pressure funnel, heat it to 80°C in a constant temperature water bath, and slowly add the above-mentioned acrylate pre-emulsion and initiator aqueous solution to four In the mouth bottle, the dropwise addition time is 2.5h. After the dropwise addition is completed, the reaction is continued for 1h to obtain a polyacrylate emulsion.

[0045] (2) Synthesis of fluorine-containing polyacrylate...

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Abstract

The invention discloses superhydrophobic and superlipophilic sponge as well as a preparation method and application of the superhydrophobic and superlipophilic sponge. The preparation method comprises the steps of dispersing a fluorine-contained polyacrylate emulsion into absolute ethyl alcohol and uniformly stirring; then, adding hydrophobic nanosilicon dioxide and carrying out ultrasonic dispersion to obtain a fluorine-contained polyacrylate / silicon dioxide ethanol dispersion liquid; next, soaking polymer sponge into the fluorine-contained polyacrylate / silicon dioxide ethanol dispersion liquid for 5-30min, lifting, and then, drying the polymer sponge at the temperature of 75-110 DEG C to obtain the superhydrophobic and superlipophilic sponge, wherein the polymer sponge is cleaned by using acetone and distilled water and is dried. The preparation method is simple in process and mild in reaction condition; the prepared superhydrophobic and superlipophilic sponge can be used for rapidly and effectively removing oily organic matters in oily sewage, has relatively high oil absorption capacity, and can be recycled many times so as to be expected to be applied to the fields such as oily sewage treatment, raw oil leakage clearing and the like.

Description

technical field [0001] The invention relates to a superhydrophobic material, in particular to a superhydrophobic and superoleophilic material, in particular to a superhydrophobic and superoleophilic sponge, its preparation method and its application. Background technique [0002] In recent years, oil spills and industrial sewage discharges have increasingly polluted the ocean and water ecological environment. Therefore, the research and development of high-efficiency oil removal materials to clean up sewage areas has aroused people's close attention. Due to their special surface wetting properties, superhydrophobic and superoleophilic materials can absorb organic solvents in water but not water, and can clean and degrease sewage areas. Arbatan et al. (Superhydrophobic and oleophilic calcium carbonate powder as a selective oil sorbent with potential use in oil spill clean-ups. Chemical Engineering Journal, 2011,166(2):787-791) prepared carbonic acid with superhydrophobic and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08F220/18C08F220/14C08F220/28C08F220/06C08F212/08C08F220/22C08F2/28C02F1/40B01D17/022
Inventor 曾幸荣李坤泉李红强赖学军
Owner SOUTH CHINA UNIV OF TECH
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