Preparation method of a three-dimensional nanofiber hydrophobic sponge capable of reabsorbing oil

A technology of three-dimensional nano- and hydrophobic sponges, which is applied in fiber treatment, chemical instruments and methods, and other chemical processes. It can solve the problems of low oil absorption rate and non-reusable use of oil-absorbing sponges, achieve excellent reusable characteristics, and improve oil absorption effects. , to achieve the effect of industrialization

Active Publication Date: 2019-08-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that the existing oil-absorbing sponge has a low oil absorption rate and cannot be reused, the present invention proposes a brand-new preparation method of a three-dimensional nanofiber hydrophobic sponge that can repeatedly absorb oil

Method used

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  • Preparation method of a three-dimensional nanofiber hydrophobic sponge capable of reabsorbing oil
  • Preparation method of a three-dimensional nanofiber hydrophobic sponge capable of reabsorbing oil
  • Preparation method of a three-dimensional nanofiber hydrophobic sponge capable of reabsorbing oil

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Embodiment 1

[0033] The present embodiment provides a method for preparing a three-dimensional nanofiber hydrophobic sponge, and the specific steps are as follows:

[0034] Step 1: Mix cellulose acetate and polyethylene oxide in a mass ratio of 2:1, and dissolve the mixture of cellulose acetate and polyethylene oxide in N,N-dimethylformamide, wherein the solute is The mass fraction is 10%. It was placed in a water bath at 60°C and heated at a constant temperature for 12 hours until the solute was completely dissolved, and a uniform and transparent electrospinning cellulose acetate / polyethylene oxide mixed solution was obtained.

[0035] Step II: transfer the cellulose acetate / polyethylene oxide mixed solution to the electrospinning device, adjust the process parameters of electrospinning as follows: spinning voltage 10kV, solution flow rate 1mL / h, drum receiving distance 20cm, controlled environment The temperature was 25° C. and the humidity was 30% to obtain a cellulose acetate / polyethy...

Embodiment 2

[0044] The present embodiment provides a method for preparing a three-dimensional nanofiber hydrophobic sponge, and the specific steps are as follows:

[0045] Step 1: Mix cellulose acetate and polyethylene oxide in a mass ratio of 4:1, and dissolve the mixture of cellulose acetate and polyethylene oxide in N-methylpyrrolidone, wherein the solute mass fraction is 15 %. It was placed in a 50°C water bath and heated at a constant temperature for 18 hours until the solute was completely dissolved, and a uniform and transparent electrospinning cellulose acetate / polyethylene oxide mixed solution was obtained.

[0046] Step II: Transfer the cellulose acetate / polyethylene oxide mixed solution to the electrospinning device, and control the electrospinning process parameters: spinning voltage 12kV, solution flow rate 0.5mL / h, drum receiving distance 15cm, and environmental temperature control 35°C and humidity of 45% to obtain a cellulose acetate / polyethylene oxide nanofiber membrane....

Embodiment 3

[0055] The present embodiment provides a method for preparing a three-dimensional nanofiber hydrophobic sponge, and the specific steps are as follows:

[0056] Step 1: Mix cellulose acetate and polyethylene oxide according to a mass ratio of 3:1, and dissolve the mixture of cellulose acetate and polyethylene oxide in acetone, wherein the mass fraction of the solute is 20%. And placed in a water bath at 80°C and heated for 10 hours at a constant temperature until the solute was completely dissolved, and a uniform and transparent electrospinning cellulose acetate / polyethylene oxide mixed solution was obtained.

[0057] Step II: transfer the cellulose acetate / polyethylene oxide mixed solution to the electrospinning device, and control the electrospinning process parameters: spinning voltage 16kV, solution flow rate 2mL / h, drum receiving distance 10cm, control ambient temperature 50 ℃ and humidity of 60% to obtain a cellulose acetate / polyethylene oxide nanofiber membrane.

[0058...

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Abstract

The invention provides a preparation method of 3D nanofiber hydrophobic sponge capable of absorbing oil repeatedly and belongs to the technical field of preparation of oil absorbent functional materials. The preparation method of the 3D nanofiber hydrophobic sponge capable of absorbing oil repeatedly comprises the steps as follows: a cellulose acetate / polyethylene oxide nanofiber membrane is obtained through electrostatic spinning by use of a cellulose acetate and polyethylene oxide mixed spinning solution; the cellulose acetate / polyethylene oxide nanofiber membrane is crosslinked and crushed, a dispersant is added, high-speed dispersion and ultrasonic treatment are adopted sequentially, the obtained mixture is subjected to freeze drying and a grafting reaction with a hydrophobic improver, and the nanofiber hydrophobic sponge capable of absorbing oil repeatedly is obtained after vacuum pumping. The prepared hydrophobic sponge has high adsorption capacity and reusability. The hydrophobic sponge has the advantages of being simple to prepare, controllable, low in cost and the like, is prone to industrialization, has the potential to replace existing commercial polypropylene and other materials and is applied to the oil stain adsorption field.

Description

technical field [0001] The invention belongs to the technical field of preparation of oil-absorbing functional materials, and in particular relates to a preparation method of a three-dimensional nanofiber hydrophobic sponge that can absorb oil repeatedly. Background technique [0002] In recent years, oil spill accidents have occurred frequently around the world, and my country, as a major maritime country, has also suffered from them. Usually, the leaked oil floats on the water surface, which is easy to spread and form a layer of oil film or oil-water emulsion, which isolates the water body from the air, resulting in the reduction of the oxygen content in the water, thus leading to the death of marine life in a large area. On the other hand, there are often many toxic and harmful substances in oil pollution, such as benzopyrene and heavy metal ions, which can enter the human body through layers of food chains, endangering life, health and safety. Therefore, the oil spilled...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28C08J9/36C08J9/28C08L1/12C08L71/02D01D5/00D04H1/4382D04H1/728
CPCB01J20/24B01J20/262B01J20/28038B01J2220/445B01J2220/4812B01J2220/4825C08J9/28C08J9/36C08J2201/0484C08J2301/12C08J2471/02D01D5/003D01D5/0061D01D5/0092D04H1/4382D04H1/728
Inventor 隋刚于思若高亮庄莉杨小平
Owner BEIJING UNIV OF CHEM TECH
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