A kind of on-demand oil-water separation membrane based on two-dimensional material and its preparation method

An oil-water separation membrane and two-dimensional material technology, which is applied in the field of on-demand oil-water separation membrane based on two-dimensional material and its preparation, can solve the problems of complex control process of separation membrane, lack of universality, stimulation of external conditions, etc. Excellent superhydrophobicity and water adhesion resistance, increased roughness, simple process effect

Active Publication Date: 2020-08-04
HUAZHONG UNIV OF SCI & TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of these separation membranes and the regulation of wetting properties are relatively complicated, requiring external stimulus, such as light, heat, etc., the cost is high, and it is not universal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of on-demand oil-water separation membrane based on two-dimensional material and its preparation method
  • A kind of on-demand oil-water separation membrane based on two-dimensional material and its preparation method
  • A kind of on-demand oil-water separation membrane based on two-dimensional material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] At room temperature, 4 g of molybdenum disulfide powder was placed in a 250 mL flask, and 200 mL of N-methylpyrrolidone was added into the flask, and ultrasonically treated for 8 hours. After allowing the resulting suspension to stand for 1 hour, the supernatant was carefully aspirated off. The suspension was vacuum filtered with PVDF membrane and washed with a large amount of ethanol. The exfoliated molybdenum disulfide nanosheets were vacuum-dried at room temperature, and then dispersed into a water-ethanol co-solvent with a volume ratio of 1:1 to prepare a suspension with a concentration of 5 mg / mL. Dip the cleaned cotton cloth into the suspension of molybdenum disulfide nanosheets, ultrasonicate for 5 minutes, take it out and dry it at 60°C, after drying, immerse the cotton cloth in the suspension of molybdenum disulfide nanosheets for 5 minutes, repeat the whole coating process 5 times, the separation membrane of the present invention can be obtained after drying....

Embodiment 2

[0047] At room temperature, 2 g of graphite powder was placed in a 250 mL flask, and then 200 mL of N,N-dimethylformamide was added into the flask, and ultrasonically treated for 4 hours. After allowing the resulting suspension to stand for 12 hours, the supernatant was carefully aspirated. The suspension was vacuum filtered through a PVDF membrane and washed with a large amount of ethanol. The obtained graphene nanosheets were vacuum-dried at room temperature, and then dispersed into a water-ethanol co-solvent with a volume ratio of 1:1 to prepare a suspension with a concentration of 8 mg / mL. The cleaned cotton cloth was immersed in the graphene nanosheet suspension, ultrasonicated for 8 minutes, taken out and dried at 50°C. After drying, the cotton cloth was dipped again into the graphene nanosheet suspension for 8 minutes. The whole coating process was repeated 3 times. Finally, the coated cotton cloth is dried to obtain the separation membrane of the present invention. ...

Embodiment 3

[0050] At room temperature, 1 g of boron nitride powder was placed in a 250 mL flask, then 200 mL of isopropanol was added into the flask, and ultrasonically treated for 6 hours. After allowing the resulting suspension to stand for 6 hours, the supernatant was carefully aspirated. The suspension was vacuum filtered through a PVDF membrane and washed with a large amount of ethanol. The exfoliated boron nitride nanosheets were vacuum-dried at room temperature, and then dispersed into a water-ethanol co-solvent with a volume ratio of 1:1 to make a suspension with a concentration of 10 mg / mL. The cleaned 500-mesh stainless steel mesh was immersed in the boron nitride nanosheet suspension, ultrasonicated for 3 minutes, taken out and dried at 40°C. After drying, the stainless steel mesh was dipped again into the boron nitride nanosheet suspension for 5 min. The whole coating process was repeated 4 times. Finally, drying can obtain the separation membrane of the present invention....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
separationaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of materials, and provides an on-demand oil-water separation film based on a two-dimensional material and a preparation method thereof. The film comprises a porous substrate material coated with a two-dimensional material nano sheet on the surface, and the porous substrate material is a macroporous substrate material with a pore diameter larger than 1 mu m or a microporous substrate material with a pore diameter of 0.02-1 mu m. The preparation method comprises the following steps: peeling off two-dimensional material powder into nano sheets by using an organic solvent, drying the nano sheets under vacuum and dispersing the nano sheets into a water-ethanol cosolvent to prepare a two-dimensional material nano sheet suspension, and coating the surface of the porous substrate material with the two-dimensional material nano sheets by adopting a soaking ultrasonic or vacuum suction filtration method to obtain the oil-water separation film, the pore size can be adjusted by the concentration, the dosage and the coating times of the two-dimensional material nano sheet suspension, an oil-water mixture and a stable emulsion can be efficiently separated. By pre-wetting with different liquids, the on-demand oil-water separation film can selectively filter water to prevent oil or filter oil to prevent water, thus realizing efficient on-demand separation.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an oil-water separation membrane and a preparation method thereof, in particular to an on-demand oil-water separation membrane based on two-dimensional materials and a preparation method thereof. Background technique [0002] Oil pollution of water bodies is one of the global environmental problems. Petroleum and its refined products (gasoline, kerosene, diesel, etc.) are leaked and randomly discharged into the ocean and surrounding water bodies during mining, refining, storage, transportation and use, causing more and more serious harm to the environment and ecosystem. The pollution of water bodies by oil in industrial wastewater and domestic sewage should not be underestimated either. How to effectively control oil-polluted water bodies has become a thorny issue today. Oil-water separation is an effective way to solve the above problems, mainly physical methods, including centrifugal m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022B82Y30/00B82Y40/00
CPCB01D17/0202B82Y30/00B82Y40/00
Inventor 董莹黄垂秀
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap