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Ceramic base carbon nano tube inorganic composite membrane and preparation method thereof

An inorganic composite membrane and carbon nanotube technology, which is applied in the field of membrane separation, can solve the problems of porosity loss and low carbon membrane porosity, and achieve high porosity, ensure electrical properties, and effectively remove the effects.

Inactive Publication Date: 2013-12-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing literature (Separation and Purification Technology, 2006, 51, 80-84; Carbon, 2003, 41, 2961-2972; Carbon, 2003, 41, 2973-2979) utilizes coal, bitumen and polymers (such as phenolic resin) However, the defects of low porosity and brittleness of the carbon film prepared by high temperature carbonization have not been solved. Although the carbon film prepared by vapor deposition method based on ceramic substrate can ensure sufficient mechanical properties, but with severe loss of porosity

Method used

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  • Ceramic base carbon nano tube inorganic composite membrane and preparation method thereof
  • Ceramic base carbon nano tube inorganic composite membrane and preparation method thereof
  • Ceramic base carbon nano tube inorganic composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1 A ceramic-based carbon nanotube composite flat ultrafiltration membrane with a small pore size was prepared.

[0028] Using a flat ZrO plate with a pore size of 200 nm 2 The ceramic membrane is used as a carrier to prepare a single-wall ceramic-based carbon nanotube composite flat ultrafiltration membrane with a pore size of <5nm. The steps are:

[0029] The first step, the pretreatment of the carrier

[0030] ZrO will be used as carrier 2 The volume ratio of the ceramic membrane is H 2 SO 4 :H 2 o 2 =3:1 Washing solution is subjected to impurity removal treatment at 80°C for 1 hour, then rinsed with deionized water until neutral, and dried for later use;

[0031] The second step, preparation of single-walled carbon nanotube dispersion

[0032] Using a surfactant-assisted method to disperse the single-walled carbon nanotubes in a 5-10wt% sodium dodecyl sulfate solution, and ultrasonically disperse to form a single-walled carbon nanotube dispersion with ...

Embodiment 2

[0036] Example 2 A ceramic-based carbon nanotube composite tubular microfiltration membrane with a large pore size was prepared.

[0037] A tubular alumina ceramic membrane with a pore size of 2000-3000 nm is used as a carrier to prepare a single-wall ceramic-based carbon nanotube composite tubular microfiltration membrane with a pore size of 140 nm. The steps are:

[0038] The first step, the pretreatment of the carrier

[0039] The tubular alumina ceramic membrane as the carrier is used with a volume ratio of H 2 SO 4 :H 2 o 2 =3:1 washing solution is subjected to impurity removal treatment at 70°C for 2 hours, then rinsed with deionized water until neutral, and dried for later use;

[0040] The second step, preparation of multi-walled carbon nanotube dispersion

[0041] First, the multi-walled carbon nanotubes with a diameter of 40-60nm are passed through a volume ratio of H 2 SO 4 :HNO 3 =3:1 acid solution was treated at 60°C for 8 hours, washed with deionized wate...

Embodiment 3

[0045] Example 3 Preparation of ceramic-based carbon nanotube composite tubular ultrafiltration membrane with medium pore size

[0046] A ceramic-based carbon nanotube composite tubular ultrafiltration membrane with a pore size of 60 nm is prepared by using an alumina tubular ceramic membrane with a pore size of 600 to 1000 nm as a carrier. The steps are:

[0047] The first step, the pretreatment of the carrier

[0048] The tubular alumina ceramic membrane as the carrier is used with a volume ratio of H 2 SO 4 :H 2 o 2=3:1 Washing solution is subjected to impurity removal treatment at 80°C for 1 hour, then rinsed with deionized water until neutral, and dried for later use;

[0049] The second step, preparation of multi-walled carbon nanotube dispersion

[0050] First, the multi-walled carbon nanotubes with a diameter of 10-20nm are passed through a volume ratio of H 2 SO 4 :HNO 3 =3:1 acid solution was treated at 60°C for 8 hours, washed with deionized water until neut...

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Abstract

The invention belongs to the field of membrane separation and relates to a ceramic base carbon nano tube inorganic composite membrane and a preparation method thereof. According to the invention, a carbon nano tube is used as a membrane function layer, porous ceramic is taken as a base body, superpolymer is taken as a reinforcement material, and a method of coating, dipping and reinforcing, and high temperature carbonizing is adopted, so that the ceramic based carbon nano tube inorganic composite membrane of which the pore diameter is controllable and the porosity factor is 70 to 90 percent is obtained. The ceramic base carbon nano tube inorganic composite membrane has excellent adsorptive property and electric conductivity, and has high membrane permeability and selectivity. According to the invention, loss of porosity factor during the traditional membrane preparation process can be avoided, the mechanical property of the membrane is enhanced, and the preparation method has the advantages that the preparation technology is simple and mass production is facilitated.

Description

technical field [0001] The invention belongs to the field of membrane separation, and relates to a ceramic-based carbon nanotube inorganic composite membrane and a preparation method. Background technique [0002] The deterioration of water quality and the shortage of water resources have seriously affected the development of society. Membrane separation technology, as the most promising water treatment process in the 21st century, has been widely concerned and vigorously promoted in recent years because it does not need to add chemical reagents during the separation process and is easy to operate. Inorganic membranes have high resistance and durability, and have broad application prospects. As a kind of inorganic membrane, carbon membrane has shown good separation performance in the gas separation process, but it is still in the research stage in water treatment. The defects of low porosity and brittleness of homogeneous carbon films seriously restrict the development of ...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/12B01D67/00
Inventor 全燮范新飞赵慧敏于洪涛陈硕张耀斌
Owner DALIAN UNIV OF TECH
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