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Hydrophobic sponge loaded with carbon nanotubes, preparation method and application of hydrophobic sponge in oil-water separation

A carbon nanotube and hydrophobic sponge technology is applied in the field of carbon nanotube-loaded hydrophobic sponge and its preparation, and can solve the problems of low oil absorption efficiency and oil-water separation efficiency, unsatisfactory hydrophobic oil absorption effect, and the like

Active Publication Date: 2021-12-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the surface of the sponge contains hydroxyl and carboxyl groups, which are usually hydrophilic, the absorption effect of the sponge on hydrophobic oil is not ideal, which is manifested as low oil absorption efficiency and oil-water separation efficiency.

Method used

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  • Hydrophobic sponge loaded with carbon nanotubes, preparation method and application of hydrophobic sponge in oil-water separation
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  • Hydrophobic sponge loaded with carbon nanotubes, preparation method and application of hydrophobic sponge in oil-water separation

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preparation example Construction

[0026] The present invention provides a method for preparing a supported carbon nanotubes hydrophobic sponge, comprising the steps of:

[0027] The urethane sponge immersed H 2 O 2 / H 2 SO 4 The oxidation reaction mixture solution to obtain a hydroxyl group-rich urethane sponge;

[0028] The coupling agent, hydroxylated benzene mixing carbon nanotubes and a solvent, to obtain a modified solution; the silane coupling agent is a silane coupling agent is C16 ~ C26;

[0029] The hydroxyl group-rich polyurethane sponge is immersed in the modified liquid to perform a diolation modification to obtain a hydrophobic sponge for load carbon nanotubes.

[0030] In the present invention, without special instructions, the raw materials are known in the art using commercially available.

[0031] The present invention is a polyurethane sponge impregnated into H 2 O 2 / H 2 SO 4 The oxidation reaction mixture solution to obtain a hydroxyl group-rich urethane sponge.

[0032] Prior to said oxidati...

Embodiment 1

[0054] Washed successively with acetone, ethanol and distilled water to a raw polyurethane (PU) sponge, respectively ultrasonic cleaning 20min, to remove the dirt on the bone, and then placed in a vacuum oven at 80 deg.] C is placed 24h, after washing the impregnated sponge to H 2 O 2 / H 2 SO 4 A mixed solution (70% H 2 O 2 Solution was mixed with 49% H 2 SO 4 Solution volume ratio of 7: 3 the oxidation reaction), a soak time 4h, then washed with distilled water to the sponge after washing was dried in a vacuum oven dried 80 deg.] C 24h, to give PU foam rich in hydroxyl;

[0055] 50mL toluene was added to the beaker, 50mg hydroxylated nanotubes (of MWCNT) to the beaker and sonicated for 20min disperse the carbon nanotubes, a carbon nanotube dispersion liquid; octadecyltrimethylammonium added to the carbon nanotubes chlorosilane coupling agent as a coupling agent prepared at a concentration of 0.05mol / L was modified; hydroxyl-rich modified PU foam is immersed in liquid, 300rpm m...

Embodiment 2

[0057] Example 1 except that, the use of hexadecyl trimethoxy silane as a silane coupling agent, the resulting product is referred to: hexadecyl trimethoxy silane -CNTs / PU sponge.

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Abstract

The invention provides hydrophobic sponge loaded with carbon nanotubes, a preparation method and application of the hydrophobic sponge, which belong to the technical field of oil-water separation. Firstly, polyurethane sponge isoxidized by using a H2O2 / H2SO4 mixed solution, so that the number of hydroxyl groups of the polyurethane sponge is increased, and the polyurethane sponge is convenient to modify; a silane coupling agent is utilized to realize combination of polyurethane sponge and hydroxylated carbon nanotubes, and specifically, hydroxyl groups of the polyurethane sponge and hydroxyl groups of the hydroxylated carbon nanotubes react with the silane coupling agent to obtain the hydrophobic sponge loaded with the carbon nanotubes. On one hand, the carbon nanotubes can increase the roughness of the surface of the polyurethane sponge and improve the hydrophobicity of the polyurethane sponge, so that the oil-water separation efficiency is improved; meanwhile, the carbon nanotubes can also improve the oil absorption rate of the polyurethane sponge, so that the oil absorption efficiency is improved; in addition, long-chain alkyl of the silane coupling agent is grafted to the polyurethane sponge, the hydrophobicity of the polyurethane sponge can be further improved, and then the oil-water separation efficiency is improved.

Description

Technical field [0001] The present invention relates to a hydrophobic sponge and in particular relates to a method for preparing carbon nanotubes and application load water separation technology, in the oil-water separation. Background technique [0002] With the development of economic growth and oil industry and maritime transport, marine oil spill presents a serious environmental challenge. After the oil spill accumulation in fish and shellfish farming, the final will be for human consumption, pose a significant threat to human health and the aquatic environment. Therefore, effective oil-water separation is urgently needed. [0003] Some conventional methods have been used to treat oil spills, such as surface skimming, in situ combustion, dispersion and absorption. Since the absorption method is simple, easy separation, absorption method commonly used for oil-water separation. Conventional absorbent materials such as cellulose, activated carbon and zeolites, most of the microp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/36C08L75/04C08K3/04B01D17/02
CPCC08J9/40C08J9/36B01D17/0202C08J2375/04C08K3/041
Inventor 李玉江刘德吴涛
Owner SHANDONG UNIV
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