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Rapid preparation method of superhydrophobic three-dimensional sponge and application thereof to oil-water separation

An oil-water separation and super-hydrophobic technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of disappearance of super-hydrophobic properties of materials, complex preparation process, and restrictions on popularization and application, and achieve good reusability and preparation Simple method, durable effect

Inactive Publication Date: 2018-09-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple dopamine surface modification is often difficult to construct micro-nano structures, so it is often necessary to add additional nanoparticles to realize the construction of micro-nano structures (CN105949861B, CN106807338A, CN105821689A, CN105062360A), which not only leads to complicated preparation process, but also the loading of nano Particles are easily damaged by external forces, resulting in the disappearance of the superhydrophobic properties of the material
At the same time, the current dopamine-based material surface modification technology has the defect of too long reaction time (4-24 hours), which greatly limits the practical application of this technology (CN105949861B, CN106807338A, CN105821689A, CN105062360A, CN104562709A, CN102961893A, CN104831534A, CN103951843B, CN104831534A)

Method used

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  • Rapid preparation method of superhydrophobic three-dimensional sponge and application thereof to oil-water separation
  • Rapid preparation method of superhydrophobic three-dimensional sponge and application thereof to oil-water separation
  • Rapid preparation method of superhydrophobic three-dimensional sponge and application thereof to oil-water separation

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Experimental program
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Effect test

Embodiment 1

[0022] (1) The specific steps for preparing the superhydrophobic three-dimensional sponge are:

[0023] (a) ultrasonically wash the melamine three-dimensional sponge in an ethanol solution for 1 hour, then repeatedly wash it with deionized water, dry it and wait for treatment;

[0024] (b) dissolving dopamine hydrochloride in water to make a 2mg / mL solution, then adding 2mg / mL of oxidizing agent and 2mmol / L of cross-linking agent;

[0025] (c) immerse the cleaned three-dimensional sponge in the above solution, take it out after stirring and reacting for 1 hour at room temperature, and then repeatedly wash with deionized water to obtain a polydopamine-coated melamine three-dimensional sponge;

[0026] (d) Make a solution of octadecyl mercaptan in ethanol with a concentration of 2 mg / mL, react at room temperature for 4 hours, take it out, wash it with ethanol and deionized water in sequence, and obtain a three-dimensional superhydrophobic melamine after drying. sponge;

[0027...

Embodiment 2

[0029] (1) The specific steps for preparing the superhydrophobic three-dimensional sponge are:

[0030] (a) ultrasonically wash the melamine three-dimensional sponge in an ethanol solution for 1 hour, then repeatedly wash it with deionized water, dry it and wait for treatment;

[0031] (b) Dopamine hydrochloride was dissolved in water to make a solution of 8 mg / mL, and then the oxidant ammonium persulfate of 8 mg / mL and the cross-linking agent butanediamine of 4 mmol / L were added;

[0032] (c) immerse the cleaned three-dimensional sponge in the above solution, take it out after stirring and reacting for 3 hours at room temperature, and then repeatedly wash with deionized water to obtain a polydopamine-coated melamine three-dimensional sponge;

[0033] (d) n-octyl mercaptan is made into a solution with a concentration of 10 mg / mL in ethanol, reacted for 5 hours at room temperature, washed with ethanol and deionized water sequentially after taking out, and made a superhydrophobi...

Embodiment 3

[0036] (1) The specific steps for preparing the superhydrophobic three-dimensional sponge are:

[0037] (a) ultrasonically wash the polyurethane three-dimensional sponge in ethanol solution for 1.5 h, then repeatedly wash with deionized water, dry and wait for treatment;

[0038] (b) Dopamine hydrochloride was dissolved in water to make a 10mg / mL solution, and then 10mg / mL of oxidizing agent sodium periodate and 8mmol / L of cross-linking agent ethylenediamine were added;

[0039] (c) immerse the cleaned three-dimensional sponge in the above solution, take it out after stirring and reacting for 3 hours at room temperature, and then repeatedly wash with deionized water to obtain a polydopamine-coated melamine three-dimensional sponge;

[0040] (d) making octylamine in ethanol into a solution with a concentration of 15 mg / mL, reacting at room temperature for 4 hours, washing with ethanol and deionized water sequentially after taking it out, and making a superhydrophobic melamine t...

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Abstract

The invention discloses a rapid preparation method of superhydrophobic three-dimensional sponge and the application thereof to oil-water separation, and solves the technical problem of low micronanostructure construction and reaction speed during the preparation of a superhydrophobic material on the basis of dopamine. The preparation method comprises the following specific steps: firstly accelerating coating of polydopamine on the surface of three-dimensional sponge by using an oxidizing agent and a crosslinking agent, then reacting with long-chain alkylthiol or amine to prepare the superhydrophobic three-dimensional sponge, and finally applying the superhydrophobic three-dimensional sponge to the oil-water separation through vacuum in-situ continuous collection. The preparation method hasthe advantages of low price, high stability, simplicity in technological method, suitability in large-scale production and the like; the prepared superhydrophobic three-dimensional sponge can be applied to the oil-water separation, has the advantages of high separation efficiency, high speed, good stability, capability of being reused for many times and the like, and has a relatively great potential in treatment to oily wastewater and a petroleum spill accident and the like.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic functional materials, in particular to the preparation of a superhydrophobic / superoleophilic three-dimensional sponge and its application in oil-water separation. Background technique [0002] With the development of global industrialization, the discharge of oily wastewater in petrochemical, metal processing, textile, food and other industries is increasing. In addition, frequent oil spills, such as the US Gulf of Mexico oil spill and the Changqing oil spill, have caused a large amount of precious oil resources to leak into rivers and oceans, causing serious environmental pollution. Oil-water separation is an important process in the treatment of oily wastewater, so it has received widespread attention. Traditional oil-water separation methods, such as deoilers, centrifuges, flotation machines, depth filters, etc., have problems such as low separation efficiency, high cost, and complica...

Claims

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Application Information

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IPC IPC(8): C08J9/36C08L61/28C08L75/04C08L25/06B01D17/022
CPCB01D17/0202C08J9/36C08J2325/06C08J2361/28C08J2375/04
Inventor 王会才杨继斌刘霞平汪振文岳瑞瑞
Owner TIANJIN POLYTECHNIC UNIV
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