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Porous-particle-doped polyimide hollow fibrous membrane, preparation method thereof, and application thereof

A technology of polyimide and fiber membranes, which is applied in fiber processing, filament/thread forming, textiles and papermaking, etc. It can solve the problems of low gas transmission rate of organic membranes and low separation effect of inorganic membranes, and achieve high permeability. Overselectivity and transmission rate, good thermal stability, and the effect of improving the separation effect

Inactive Publication Date: 2012-04-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a polyimide hollow fiber membrane doped with porous particles and prepare Method and its application

Method used

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  • Porous-particle-doped polyimide hollow fibrous membrane, preparation method thereof, and application thereof
  • Porous-particle-doped polyimide hollow fibrous membrane, preparation method thereof, and application thereof
  • Porous-particle-doped polyimide hollow fibrous membrane, preparation method thereof, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 metal organic framework material Cu 3 (BTC) 2 Synthesis of particles

[0040] Get 1 gram of trimesic acid and dissolve it in 15 milliliters of N, N'-dimethylformamide and 15 milliliters of ethanol, get 2 grams of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 15 mL of deionized water. Mix both well. React at 85°C for 8 hours, filter under reduced pressure to obtain a solid, and wash with ethanol three times. Add 100 milliliters of ethanol and reflux at 80°C for 6 hours, filter under reduced pressure, and dry the product in an oven at 100°C for 4 hours. 14 The reported method was compared, and the final product was determined to be Cu 3 (BTC) 2 . After testing, its pore size is 0.8 nanometers, and its BET specific surface area is 1035cm 2 / g, Cu at 300°C 3 (BTC) 2 structure remains stable. CO at room temperature 2The adsorption capacity can reach 4.0 mmol / g.

Embodiment 2

[0041] The synthesis of embodiment 2MCM-41 particle

[0042] Take 1 g of cetyltrimethylammonium bromide, dissolve it in 480 ml of deionized water, stir to dissolve completely, heat to 80°C, add 3.5 ml, 2 mol / L NaOH and stir for about 5 minutes, slowly add 5 ml dropwise Ethyl orthosilicate was reacted in the above solution at 80°C for 2 hours. The solid was filtered under reduced pressure and washed with 500 ml of deionized water and 250 ml of ethanol respectively. The product is dried in an oven at 60°C for 6 hours, then heated to 550°C at a rate of 2°C / min, and kept at 550°C for 6 hours. The XRD pattern of the obtained product was compared with the method reported in the references D.R.Radu, C.Lai, J.W.Wiench, et al., J.Am.Chem.Soc., 2004, 126, 1640-1641, and the final product was determined to be MCM-41. Its pore size was detected to be 2.5 nanometers.

Embodiment 3

[0043] The synthesis of embodiment 3SBA-15 particles

[0044] Take 1 gram of tri-block copolymer P123 in an Erlenmeyer flask, add 25 ml of deionized water, stir vigorously at room temperature, then slowly add 25 ml of 4 mol / L hydrochloric acid, and mix well. Slowly add 2 ml of tetraethyl orthosilicate to the above solution, and keep stirring and aging at room temperature for 24 hours. After 48 hours, the solid was filtered under reduced pressure and washed with 500 ml of deionized water and 250 ml of ethanol respectively. The product is dried in an oven at 60°C for 6 hours, then heated to 550°C at a rate of 2°C / min, and kept at 550°C for 6 hours. Gained product XRD figure and reference J.S.Lee, J.H.Kim, J.T.Kim, J.K.Suh, J.M.Lee, C.H.Lee, J.Chem.Eng.Data, 2002, 47, 1237-1242 report method contrast, determine that final product is SBA -15. Its pore diameter was detected to be 6.5 nanometers.

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Abstract

The invention provides a porous-particle-doped polyimide hollow fibrous membrane, a preparation method thereof, and an application thereof. The hollow fibrous membrane provided by the invention comprises polyimide as a substrate and porous particles as adulterants. The preparation method provided by the invention comprises steps that: a hollow fibrous membrane green body is prepared through dry-wet spinning; and the porous-particle-doped polyimide hollow fibrous membrane is prepared through thermal imidization. The hollow fibrous membrane provided by the invention is applied in gas separation. Advantages of organic and inorganic membranes are combined in the hollow fibrous membrane provided by the invention. The hollow fibrous membrane has good thermal stability, good chemical stability, good mechanical strength, improved gas permeation selectivity, improved gas permeation speed, and improves gas separation effect.

Description

technical field [0001] The invention belongs to the field of gas separation membranes, in particular to a polyimide hollow fiber membrane doped with porous particles, its preparation method and application. Background technique [0002] Membrane method is a new type of separation technology developed in the past ten years. Compared with traditional separation technology, membrane separation technology has the advantages of no phase change, high efficiency, energy saving, easy operation, and no secondary pollution. As the climate has become more and more serious due to the "greenhouse effect" and air pollution in recent years, the separation methods of gases have attracted more and more attention. For example, key technical issues such as the separation of hydrogen from coal gasification and the capture and storage of carbon dioxide need to be resolved urgently. The gas separation characteristics mainly depend on the choice of membrane material. Among them, polyimide has go...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10D01D5/247B01D53/22
Inventor 胡军任慧卿刘洪来高峰朱德强
Owner EAST CHINA UNIV OF SCI & TECH
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