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
6 Cites 29 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a polyimid...
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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.

Application Domain

Technology Topic

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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(10)

Example Embodiment

[0039] Example 1 Metal organic frame structure material Cu 3 (BTC) 2 Synthesis of particles
[0040] Dissolve 1 g of trimesic acid in 15 ml of N,N’-dimethylformamide and 15 ml of ethanol. Take 2 g of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 15 ml of deionized water. Mix the two evenly. Reacted at 85°C for 8 hours, filtered under reduced pressure to obtain a solid, which was washed three times with ethanol. Add 100 ml 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. The XRD pattern of the obtained product is in accordance with the reference Rowsell, JLC; Yaghi.OMMicroporous Mesoporous Mater.2004,73,3- 14 Compared with the reported methods, the final product is determined to be Cu 3 (BTC) 2. The pore diameter is 0.8 nanometers and the BET specific surface area is 1035cm. 2 /g, Cu at 300℃ 3 (BTC) 2 The structure remains stable. CO at room temperature 2 The adsorption capacity can reach 4.0 mmol/g.

Example Embodiment

[0041] Example 2 Synthesis of MCM-41 particles
[0042] Take 1 g of hexadecyltrimethyl amine 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, stir for about 5 minutes and slowly add 5 ml dropwise Ethyl orthosilicate was reacted in the above solution at 80°C for 2 hours. The solid was obtained by suction filtration under reduced pressure, and washed with 500 ml deionized water and 250 ml ethanol respectively. The product was dried in an oven at 60°C for 6 hours, and then heated to 550°C at a heating 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 reference 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. The pore size is 2.5 nanometers.

Example Embodiment

[0043] Example 3 Synthesis of SBA-15 particles
[0044] Take 1 g of triblock copolymer P123 in an Erlenmeyer flask, add 25 ml of deionized water, stir vigorously at room temperature, and slowly add 25 ml of 4 mol/L hydrochloric acid in sequence, and stir and mix well. Slowly add 2 ml of ethyl orthosilicate to the above solution, keep stirring and aging at room temperature for 24 hours, then pour the obtained milky white solution into a stainless steel hydrothermal reaction kettle lined with polytetrafluoroethylene, and crystallize at 100°C. After 48 hours of aging, the solid was obtained by suction filtration under reduced pressure, and washed with 500 ml of deionized water and 250 ml of ethanol respectively. The product was dried in an oven at 60°C for 6 hours, and then heated to 550°C at a heating 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 references JSLee, JHKim, JTKim, JKSuh, JMLee, CHLee, J. Chem. Eng. Data, 2002, 47, 1237-1242, and the final product was determined to be SBA -15. The pore diameter is 6.5 nanometers.
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PUM

PropertyMeasurementUnit
Aperture0.5 ~ 6.5nm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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