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Silanized boron nitride modified super-hydrophobic sponge for oil/water separation and preparation method of silanized boron nitride modified super-hydrophobic sponge

A super-hydrophobic sponge, boron nitride technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of unstable sponge and limit large-scale application, and achieve excellent flame retardant properties and compressive properties, The effect of overcoming the interface compatibility problem and improving the stability

Inactive Publication Date: 2021-02-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, most sponges with flexible segments are unstable in harsh environments, which limits their large-scale applications.

Method used

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  • Silanized boron nitride modified super-hydrophobic sponge for oil/water separation and preparation method of silanized boron nitride modified super-hydrophobic sponge
  • Silanized boron nitride modified super-hydrophobic sponge for oil/water separation and preparation method of silanized boron nitride modified super-hydrophobic sponge
  • Silanized boron nitride modified super-hydrophobic sponge for oil/water separation and preparation method of silanized boron nitride modified super-hydrophobic sponge

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Experimental program
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Effect test

Embodiment 1

[0026] A silanized boron nitride modified superhydrophobic sponge for efficient oil / water separation, the preparation method comprising the following specific steps:

[0027] 1) Preparation of hydroxylated boron nitride: uniformly grind the mixture of KOH (2.0600g), NaOH (2.7160g) and h-BN powder (1g). After milling, the above mixture was further transferred to a polytetrafluoroethylene (PTFE) stainless steel autoclave. Subsequently, the system was heated at 180° C. for 2 hours. The mixture was taken out and cooled to room temperature. The solid product was collected and washed repeatedly with ethanol and deionized water until the pH of the filtrate was close to neutral. Finally, the solution is centrifuged to obtain hydroxylated boron nitride powder, which is dried and used;

[0028] 2) Preparation of silylated boron nitride: at 90°C, carry out silane coupling reaction in a mixture of octadecyltrimethoxysiloxane (0.5mL) and hydroxylated boron nitride (0.05g) in ethanol and...

Embodiment 2

[0031] A method for preparing a silanized boron nitride-modified superhydrophobic sponge for efficient oil / water separation, step 1) and step 2) are the same as in Example 1.

[0032] Step 3) Prepare the silylated boron nitride modified sponge, immerse the commercial melamine sponge in the suspension solution containing 10wt% silylated boron nitride modified, and the reaction time is half an hour. After the reaction, the unreacted boron nitride and silane on the surface of the sponge were cleaned with acetone solution, and dried in an oven at 80°C for 5 hours. The prepared sponge was marked as Silane-BN@10%.

Embodiment 3

[0034] A method for preparing a silanized boron nitride-modified superhydrophobic sponge for efficient oil / water separation, step 1) and step 2) are the same as in Example 1.

[0035] Step 3) Prepare the silylated boron nitride modified sponge, immerse the commercial melamine sponge in the suspension solution containing 15wt% silylated boron nitride modified, and the reaction time is half an hour. After the reaction, the unreacted boron nitride and silane on the surface of the sponge were cleaned with acetone solution, and dried in an oven at 80°C for 5 hours. The prepared sponge was marked as Silane-BN@15%.

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Abstract

The invention belongs to the technical field of oil-water separation, and particularly relates to silanized boron nitride modified super-hydrophobic sponge for efficient oil / water separation and a preparation method thereof. The preparation method comprises the following steps: dipping commercial melamine sponge into a suspension solution of octadecyltrimethoxysilane-modified boron nitride, and then conducting drying to obtain the modified super-hydrophobic sponge. The silanized boron nitride modified super-hydrophobic sponge obtained by the invention shows better super-hydrophobicity, the oiladsorption capacity of the silanized boron nitride modified super-hydrophobic sponge is 50-100 times that of commercial melamine sponge, and after 20 continuous absorption periods, the absorption performance is not obviously reduced, and it is indicated that the silanized boron nitride modified sponge has remarkable recyclability. The prepared modified super-hydrophobic sponge has excellent flameretardant property. Compared with a traditional method that the super-hydrophobic coating is physically attached to the sponge, the stability of the silanized boron nitride modified sponge is remarkably improved due to covalent binding of alkyl silane and the surface of the framework.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and in particular relates to a silanized boron nitride-modified superhydrophobic sponge for efficient oil / water separation and a preparation method thereof. Background technique [0002] In recent years, marine oil spills have occurred frequently, posing a serious threat to the marine environment and aquatic ecosystems. In addition, the development of industries such as mining, food, textiles, leather, metal processing, steel and automobiles produces a large amount of oily wastewater, causing serious damage to marine ecosystems and human health. Therefore, oil-water separation is an urgent problem to be solved in modern industrial pollution and marine environment. Traditional oil-water separation technologies include separation, filtration, centrifugation, flotation and electrochemical methods. Among the various oil removal methods currently developed, adsorption technology has att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40B01D17/022C08L61/28
CPCC08J9/40B01D17/0202C08J2361/28
Inventor 王景韩双乔张亚涛彭东来
Owner ZHENGZHOU UNIV
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