Preparation method for hydrophilic oil-water separation membrane imitating cobweb structure

An oil-water separation membrane and hydrophilic technology, which is applied in the field of environmental protection and chemical separation, can solve the problems of multi-walled carbon nanotubes, such as easy self-agglomeration, poor mechanical processing performance, and low mechanical strength, to overcome low mechanical strength and effectively Hydrophilic modification, effective dispersion effect

Active Publication Date: 2018-11-23
江阴智产汇知识产权运营有限公司
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to overcome the defects of multi-walled carbon nanotubes that are easy to self-agglomerate, poor machining performance, and l

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
  • Preparation method for hydrophilic oil-water separation membrane imitating cobweb structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a hydrophilic oil-water separation membrane imitating a spider web structure, comprising the steps of:

[0031] a) Dispersion of multi-walled carbon nanotubes: add 0.5 mL of perchloric acid per gram of multi-walled carbon nanotubes, react the mixture at 120 °C for 6 h, and deionize the obtained multi-walled carbon nanotubes Rinse with water 10 times until the pH is neutral, and dry in a vacuum oven at 60 °C for 5 h. Add 0.5 g of dispersed multi-walled carbon nanotubes per liter of water to obtain a black liquid. The black liquid was ultrasonically oscillated for 5 h to obtain a fully dispersed multi-walled carbon nanotube dispersion;

[0032] b) Purification of the dispersion of multi-walled carbon nanotubes: centrifuging and purifying the obtained multi-walled carbon nanotubes dispersion at 9000 rad / min for 30 min, and taking the supernatant to obtain a completely dispersed multi-walled carbon nanotubes dispersion;

[0033] c) Preparation of h...

Embodiment 2

[0036] A preparation method of a hydrophilic oil-water separation membrane imitating a spider web structure, comprising the steps of:

[0037] a) Dispersion of multi-walled carbon nanotubes: add 5 mL of nitric acid per gram of multi-walled carbon nanotubes, react the mixture at 140 °C for 3 h, and rinse the obtained multi-walled carbon nanotubes with deionized water 10 times until the pH was neutral, and dried in a vacuum oven at 80°C for 3 h. Add 1 g of dispersed multi-walled carbon nanotubes per liter of water to obtain a black liquid. The black liquid was ultrasonically oscillated for 8 h to obtain a fully dispersed multi-walled carbon nanotube dispersion;

[0038] b) Purification of the dispersion of multi-walled carbon nanotubes: centrifuging and purifying the obtained multi-walled carbon nanotubes dispersion at 10,000 rad / min for 20 min, and taking the supernatant to obtain a completely dispersed multi-walled carbon nanotubes dispersion;

[0039] c) Preparation of hydr...

Embodiment 3

[0042] A preparation method of a hydrophilic oil-water separation membrane imitating a spider web structure, comprising the steps of:

[0043] a) Dispersion of multi-walled carbon nanotubes: 3 mL of concentrated sulfuric acid was added to each gram of multi-walled carbon nanotubes, and the mixture was reacted at 160 °C for 4 h, and the obtained multi-walled carbon nanotubes were deionized water Rinse 15 times until the pH is neutral, and dry in a vacuum oven at 80 °C for 5 h. Add 2 g of dispersed multi-walled carbon nanotubes per liter of water to obtain a black liquid. The black liquid was ultrasonically oscillated for 12 hours to obtain a completely dispersed multi-walled carbon nanotube dispersion;

[0044] b) Purification of the dispersion of multi-walled carbon nanotubes: centrifuging and purifying the obtained multi-walled carbon nanotubes dispersion at 12000 rad / min for 20 min, and taking the supernatant to obtain a completely dispersed multi-walled carbon nanotubes di...

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
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of chemical separation and environmental protection, and relates to a preparation method for a hydrophilic oil-water separation membrane imitating a cobwebstructure. The preparation method comprises the steps that multi-walled carbon nanotubes which are mutually intertwined are broken through inorganic acid at high temperature so as to obtain multi-walled carbon nanotube dispersion liquid, centrifuging and separating are carried out, and then supernate is taken; and 2-5 g of super-long MnO2 nanowires are added into per liter of water, mixed suspension liquid is stirred for 5-24 hours, the multi-walled carbon nanotube dispersion liquid and the super-long MnO2 nanowire dispersion liquid are mixed according to the volume ratio of 1:3-5:1 and thenare stirred, finally the multi-walled carbon nanotube/super-long MnO2 nanowire mixed solution is subjected to vacuum filtration in a vacuum filtration device with a commercial filtration membrane fixed so as to obtain a oil-water separation membrane imitating the cobweb structure, a hydrophilic filter membrane is peeled off, and drying is carried out so as to obtain the hydrophilic oil-water separation membrane imitating the cobweb structure. According to the preparation method, the super-long MnO2 nanowires are mutually intertwined so as to form a large-aperture supporting network, the multi-walled carbon nanotubes and the supporting network are mutually intertwined so as to form a small-aperture network structure, so that the cobweb structure is effectively imitated, and the purpose of enhancing the mechanical strength of the multi-walled carbon nanotube membrane is achieved.

Description

technical field [0001] The invention belongs to the technical fields of chemical separation and environmental protection, and relates to an oil-water separation membrane with a bionic structure, in particular to a method for preparing a hydrophilic oil-water separation membrane with a spider web structure. Background technique [0002] Due to the huge difference in surface tension between oil and water, filter membranes with special wettability have become an advanced means for treating oil-water mixtures. Currently, superhydrophobic separation membranes are commonly used in these membranes, which can achieve the separation effect of selective permeation and absorption of oil and repelling water in oil-water mixtures. However, since water has a higher density than oil, water tends to form a barrier layer on the surface of the hydrophobic membrane to prevent oil from penetrating. In addition, such membranes are easily fouled or even clogged by selectively permeable oils, res...

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
IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D17/022
CPCB01D17/02B01D67/0039B01D69/02B01D71/021B01D71/024B01D2325/36
Inventor 岳学杰张涛邱凤仙杨冬亚郭卿俞汉强荣坚
Owner 江阴智产汇知识产权运营有限公司
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