A kind of superhydrophobic superoleophilic melamine foam and its preparation method and application

A technology of lipophilic melamine and melamine, which is applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems that melamine materials have not reached the superhydrophobic state, the modification takes a long time, and is unfavorable for large-scale production. Accurate and efficient modification method, good reusability, and improved oil-water selectivity

Active Publication Date: 2020-04-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the above two patent applications, there were common deficiencies: none of the modified melamine materials reached the superhydrophobic state (superhydrophobic means that the static contact angle of water droplets in the air is greater than 150°), and the oil absorption rate is low
However, the modified materials polydopamine and mercapto fluorinated long-chain alkanes are expensive, and the modification takes a long time, which is still unfavorable for large-scale production.

Method used

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  • A kind of superhydrophobic superoleophilic melamine foam and its preparation method and application
  • A kind of superhydrophobic superoleophilic melamine foam and its preparation method and application
  • A kind of superhydrophobic superoleophilic melamine foam and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Mix 3‐mercaptopropyltriethoxysilane, deionized water, and absolute ethanol in a volume ratio of 2:3:45, adjust the pH of the system to 4 with 0.1mol / L hydrochloric acid, and stir for 1 hour at room temperature to prepare Obtain pre-hydrolyzate;

[0039] Immerse the melamine foam (MS) under the surface of the above-mentioned prehydrolyzed liquid, take it out after reacting for 2 hours, clean it with ethanol, and dry it at 80°C to prepare the mercaptolated melamine foam (MS-SH);

[0040] Mix photoinitiator 1173, octadecyl methacrylate, and tetrahydrofuran in a quartz container to obtain a mixed solution, wherein the concentration of octadecyl methacrylate is 0.1mmol / L, and the amount of photoinitiator 1173 accounts for 1% of methacrylic acid 10% of octadecyl ester mass. The resulting mercaptolated melamine foam (MS-SH) was immersed below the liquid surface of the mixed solution, placed at 3 cm above the liquid surface with a 40W ultraviolet lamp, and energized for 1 hour ...

Embodiment 2

[0048] Mix 3‐mercaptopropyltriethoxysilane, deionized water, and absolute ethanol uniformly in a volume ratio of 1.5:4:45, adjust the pH of the system to 4 with 0.1mol / L hydrochloric acid, and stir for 1.5 hours at room temperature to prepare Obtain pre-hydrolyzate;

[0049] Immerse the melamine foam (MS) under the surface of the above-mentioned prehydrolyzed liquid, take it out after reacting for 2.5 hours, clean it with ethanol, and dry it at 80°C to prepare the mercaptolated melamine foam (MS‐SH);

[0050] Mix photoinitiator 184, octadecyl methacrylate, and tetrahydrofuran in a quartz container to prepare a mixed solution, wherein the concentration of octadecyl methacrylate is 0.1mmol / L, and the amount of photoinitiator 184 accounts for 1% of methacrylic acid 10% of octadecyl ester mass. Immerse the obtained MS‐SH under the liquid surface of the mixed solution, place a 40W ultraviolet lamp at 3 cm above the liquid surface, and irradiate with electricity for 1 hour to prepa...

Embodiment 3

[0054] Mix 3‐mercaptopropyltrimethoxysilane, deionized water, and absolute ethanol uniformly in a volume ratio of 2.5:4:45, adjust the pH of the system to 4 with 0.1mol / L hydrochloric acid, and stir for 2 hours at room temperature to obtain pre-hydrolyzate;

[0055] Immerse the melamine foam (MS) under the surface of the above-mentioned pre-hydrolyzed liquid, take it out after reacting for 3 hours, clean it with ethanol, and dry it at 80°C to prepare the mercaptolated melamine foam (MS-SH);

[0056] Mix photoinitiator 1173, hexadecyl methacrylate, and tetrahydrofuran in a quartz container to prepare a mixed solution, wherein the concentration of stearyl methacrylate is 0.15mmol / L, and the amount of photoinitiator 1173 accounts for 1% of methacrylic acid 10% of octadecyl ester mass. Immerse the MS-SH obtained in step 2 below the liquid surface of the mixed solution, place a 40W ultraviolet lamp at 3 cm above the liquid surface, and irradiate with electricity for 1 hour to prep...

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Abstract

The invention discloses super-hydrophobic and super-oleophylic melamine foam and a preparation method and application thereof. The super-hydrophobic and super-oleophylic melamine foam is prepared by the following steps of using porous melamine foam as a substrate; chemically grafting the substrate with a substance of one or a mixture of trimethoxysilylpropanethiol and 3-mercaptopropyltriethoxysilane to activate the substrate; under the existence of ultraviolet light and light initiator, enabling the thiol and the vinyl of long-chain alkane acrylic ester to generate clicking chemical reaction, so as to enrich C-C long chains on the substrate, so that the surface energy of the substrate is reduced, the roughness is improved, the hydrophobic property is greatly improved, and the oil and water selectivity is obviously improved. The preparation method has the advantages that the hydrophobic modification on the melamine foam is precise, the efficiency is high, the operation is simple and convenient, the implementing is easy, the consumption time is short, the cost is low, and the method is suitable for large-scale production. The super-hydrophobic and super-oleophylic melamine foam can be directly applied to the sea oil overflow, recycling of leaked chemicals, separation of oil and water mixture, and the like.

Description

technical field [0001] The invention relates to a melamine foam, in particular to a superhydrophobic and superoleophilic melamine foam, a preparation method and application thereof, and belongs to the technical field of functional materials. Background technique [0002] In recent years, frequent leaks of crude oil and organic chemicals have not only resulted in a great waste of resources, but also brought serious burdens to the environment and ecosystem. Since crude oil or organic chemicals are easy to diffuse and volatilize, how to collect them quickly and on a large scale is an important issue. [0003] Using oil-absorbing materials to absorb and recover oil is a green, environmentally friendly, effective and feasible method. At present, adsorption materials can be roughly divided into inorganic materials, natural polymer materials and polymer materials and so on. Inorganic adsorption materials such as activated carbon, silica, expanded graphite, organically modified cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J7/18B01J20/26B01J20/28B01J20/30C08L61/28
CPCB01J20/262B01J20/28045C08J7/18C08J9/40C08J9/405C08J2361/28
Inventor 皮丕辉曾一成侯昆文秀芳徐守萍程江
Owner SOUTH CHINA UNIV OF TECH
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