Graphene composite aluminium oxide ceramic nano-filtration membrane, filter, and preparation method and application thereof

A technology of alumina ceramic membrane and alumina ceramic, which is applied in chemical instruments and methods, ceramic products, applications, etc., can solve the problems of polymer filtration membrane difficulties, unsatisfactory separation effect, and lack of uniform pore diameter of clear pore channels, etc., to achieve effective Intercept water molecules, clean separation, large flux effect

Active Publication Date: 2018-07-20
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Similar to CS, none of the existing nanoporous polymer membranes have well-defined pore channels or nanoscale uniform pore sizes for clean molecular separation.
And as the nanopore size used for separation becomes smaller and smaller, it becomes more and more difficult to manufacture small-pore polymer filtration membrane
And in view of the fact that the separation effect of the existing anhydrous ethanol separation membrane is not satisfactory, therefore, there is an urgent need to find a new type of filtration membrane to achieve clean separation of water and ethanol

Method used

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  • Graphene composite aluminium oxide ceramic nano-filtration membrane, filter, and preparation method and application thereof
  • Graphene composite aluminium oxide ceramic nano-filtration membrane, filter, and preparation method and application thereof
  • Graphene composite aluminium oxide ceramic nano-filtration membrane, filter, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Graphene-alumina ceramic nanocomposite filtration membranes were prepared by chemical vapor deposition.

[0046] Put 0.5 g of silicone rubber and a tubular alumina ceramic membrane without any treatment into a tube furnace. The reactor was heated under argon with a heating rate of 1Ks -1 , the argon flow rate is 300 sccm. When the temperature rises to 873K, a certain amount of hydrogen gas (for example, 200 sccm) is introduced into the atmosphere, and the temperature is kept rising until the deposition temperature (including 1073 and 1273K) is reached. Keep the two kinds of gas flow and temperature conditions for a certain period of time (including 120s and 1200s), after the graphene growth is completed, the substrate is cooled to room temperature under argon and hydrogen conditions to obtain the graphene-alumina ceramic nanocomposite filter of the present invention membrane.

[0047] Figure 4 and Figure 5 It is the SEM figure of the nanocomposite filter membrane...

Embodiment 2

[0049] The thickness of the graphene growth is controlled by the quality of the silicone rubber. Specifically, by using the same method as in Example 1, only adjusting the amount of the silicone rubber, graphene layers with different thicknesses (500nm-1000nm) can be obtained as required.

Embodiment 3

[0051] The graphene-alumina ceramic nanocomposite filtration membrane of embodiment 1-2 is used for the separation of ethanol and water, and the process of separation can be seen image 3 As shown, the separation effect reached about 95%.

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Abstract

The invention discloses a graphene composite aluminium oxide ceramic nano-filtration membrane, a filter, and a preparation method and application thereof. The nano-composite filtration membrane comprises an aluminium oxide ceramic membrane and a graphene layer which is positioned on at least one side surface of the aluminium oxide ceramic membrane; the pore size of the nano-composite filtration membrane is about 1 to 2 nm. The nano-composite filtration membrane provided by the invention has high hydrophobicity, high flux and high retention rate; moreover, the pores of the membrane cannot be blocked; water molecules can be effectively retained; the nano-composite filtration membrane is fouling resistant and easy to clean. The filter prepared by the filtration membrane is particularly suitable for separating water from ethyl alcohol; in addition, the preparation method of the nano-composite filtration membrane provided by the invention is easy to operate, convenient and practical.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanocomposite materials, and in particular relates to a graphene-composite alumina ceramic nanofiltration membrane, a filter and a preparation method and application thereof. Background technique [0002] Since ethanol and water form an azeotrope (at 101.323kPa, the composition of the azeotropic liquid contains 0.894 mole fraction of ethanol, and the azeotropic point temperature is 78.15°C), so absolute ethanol cannot be obtained by ordinary rectification. At present, for the separation of ethanol and water, the main industrial technologies include distillation, membrane separation (including pervaporation membrane separation PV and steam permeation membrane separation VP) and adsorption. Distillation includes extractive distillation, salt distillation and azeotropic distillation. Compared with the distillation method, the membrane separation method has the advantages of energy saving, environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/02B01D67/00B01D61/00C04B35/10C04B35/622C04B38/00C04B41/85
CPCB01D61/00B01D67/0072B01D69/12B01D71/021B01D71/025B01D2325/38C04B35/10C04B35/62218C04B38/0054C04B41/009C04B41/5001C04B41/85C04B41/4531
Inventor 童海霞
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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