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Aperture-controllable CS/PLA oil-water separating nanometer fiber film and preparation method thereof

A nanofiber membrane, oil-water separation technology, applied in fiber processing, filament/thread forming, textile and paper making, etc., can solve the problems of pollution, high cost, unfavorable control, etc., achieve simple process, low cost, improve oil flow volume effect

Active Publication Date: 2017-07-04
上海迅江科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method is limited by many conditions, the cost is high, and it is easy to cause secondary or other pollution; the physical method mainly includes oil skimmer method, oil-absorbing material adsorption method and activated carbon adsorption and filtration method, which are mainly used for large-scale oil spill accidents and are not suitable Gasoline and other light oils have problems such as high cost; biological methods are restricted by the environment, which is not conducive to control

Method used

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  • Aperture-controllable CS/PLA oil-water separating nanometer fiber film and preparation method thereof
  • Aperture-controllable CS/PLA oil-water separating nanometer fiber film and preparation method thereof
  • Aperture-controllable CS/PLA oil-water separating nanometer fiber film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] At room temperature, 0.2g CS was dissolved in 10g 90% acetic acid solution to obtain CS solution; at 30°C, 0.1g PLA was dissolved in 10mL chloroform to obtain PLA solution. At room temperature, add 3g of CS solution to 9g of PLA solution, add 4g of absolute ethanol dropwise, and stir for 4 hours to obtain a uniform sol-spinning solution; inject the sol-spinning solution into the electrospinning equipment, at 25°C, voltage 20kV , the ejection rate of the sol-spinning liquid is 2mL / h, and the distance between the spinning receiving plate and the electrode is 15cm, and the receiving plate used is a stainless steel plate (0 mesh). After drying for 24 hours, a CS / PLA nanofibrous membrane for oil-water separation with controllable pores was obtained.

Embodiment 2

[0047] At room temperature, 0.2g CS was dissolved in 10g 90% acetic acid solution to obtain CS solution; at 30°C, 0.1g PLA was dissolved in 10mL chloroform to obtain PLA solution. At room temperature, add 3g of CS solution to 9g of PLA solution, add 4g of absolute ethanol dropwise, and stir for 4 hours to obtain a uniform sol-spinning solution; inject the sol-spinning solution into the electrospinning equipment, at 25°C, voltage 20kV , the ejection speed of the sol spinning liquid is 2mL / h, and the distance between the spinning receiving plate and the electrode is 15cm, and the receiving plate used is a 40-mesh stainless steel mesh. A CS / PLA nanofibrous membrane for oil-water separation with controllable pores was obtained.

Embodiment 3

[0049] At room temperature, 0.2g CS was dissolved in 10g 90% acetic acid solution to obtain CS solution; at 30°C, 0.1g PLA was dissolved in 10mL chloroform to obtain PLA solution. At room temperature, add 3g of CS solution to 9g of PLA solution, add 4g of absolute ethanol dropwise, and stir for 4 hours to obtain a uniform sol-spinning solution; inject the sol-spinning solution into the electrospinning equipment, at 25°C, voltage 20kV , the spraying speed of the sol spinning liquid is 2mL / h, and the distance between the spinning receiving plate and the electrode is 15cm, and the receiving plate used is a 30-mesh stainless steel mesh. A CS / PLA nanofibrous membrane for oil-water separation with controllable pores was obtained.

[0050] figure 1 Optical micrograph a and scanning photo b of the CS / PLA oil-water separation nanofiber membrane prepared for this example. Depend on figure 1 It can be seen that the average diameter of the CS / PLA oil-water separation nanofibers prepare...

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Abstract

The invention provides an aperture-controllable CS / PLA oil-water separating nanometer fiber film and a preparation method thereof, and the preparation comprises the steps of dissolving PLA in a solvent to obtain a PLA solution; dissolving CS in a solvent to obtain a CS solution; mixing the PLA solution and the CS solution and adding waterless ethanol and stirring for 3-5 h to obtain a uniform sol spinning liquid. The aperture-controllable CS / PLA oil-water separating nanometer fiber film can be obtained by static spinning, peeling and drying. The CS / PLA oil-water separating nanometer fiber film is obtained by static spinning; and the aperture among fibers is controlled by adjusting mesh number of a receiving net. Therefore, the process is simple, the cost is low; the process is green and has no pollution, and the film can be conveniently applied. The prepared nanometer fiber film has a relatively high oil separation efficiency; the separating speed is fast; the separating effect is good; the film can be repeatedly used; the film has a good stability; a stable separating efficiency to oil-and-water mixture of different pH values can be maintained.

Description

technical field [0001] The invention relates to a CS / PLA oil-water separation nanofiber membrane with controllable pores and a preparation method thereof, belonging to the technical field of oil-water separation. Background technique [0002] Oil has made great contributions to the progress and development of human society. With the development of industry, the demand for oil has increased sharply, and people's exploration of oil has expanded from regional to global. However, in the process of exploitation, storage, transportation and use, oil enters rivers and lakes in various forms due to unexpected problems. Oil pollution has gradually become a serious environmental problem. The leakage of crude oil at sea not only cuts off the oxygen in the covered area, leading to the death of marine life, but also threatens the survival of aquatic life in oily sewage, resulting in deterioration of water quality. On the one hand, it disrupts the local biological chain and endangers the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00
CPCD01D5/0015D01D5/0076D04H1/728
Inventor 卢启芳王东赵晴张海敬
Owner 上海迅江科技有限公司
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