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Polyvinylidene fluoride/palladium nanoparticle hybrid hollow fiber membrane and preparation method thereof

A polyvinylidene fluoride and palladium nanotechnology, which is applied in the manufacture of hollow filaments, chemical instruments and methods, chemical characteristics of fibers, etc., can solve problems such as the decline of catalytic activity, and achieve simple equipment, easy industrial implementation, and simple preparation method. Effect

Inactive Publication Date: 2014-06-18
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, palladium nanoparticles with high catalytic activity must be dispersed on a good support to prevent the accumulation of these nanoparticles and cause a decrease in catalytic activity.

Method used

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  • Polyvinylidene fluoride/palladium nanoparticle hybrid hollow fiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of PVDF solution: PVDF is dissolved in DMF to obtain a 15Wt% polyvinylidene fluoride solution;

[0047] (2) Preparation of polymer gel: dissolve 50 g of polymer monomer (meth)acrylic acid or 4-vinylpyridine, 0.5 g of crosslinking agent MBAA and 0.5 g of initiator KPS in 1000 mL of water, and heat 1. Carry out radical polymerization for 8 hours under nitrogen protection conditions, centrifugal precipitation, and vacuum drying to obtain poly(meth)acrylic acid or poly-4-vinylpyridine gel;

[0048] (3) Preparation of polymer gel / palladium nanoparticle hybrids: at 25°C, 20 g of the polymer gel obtained in step (2) was dispersed in 100 mL of deionized water, 1 g of chloropalladium acid was added, and 1 g of sodium borohydride Reduction, centrifugal precipitation, and drying to obtain polymer gel / palladium nanoparticle hybrids;

[0049] (4) Preparation of polymer gel / palladium nanoparticle hybrid dispersion: disperse the polymer gel / palladium nanoparticle hybr...

Embodiment 2

[0056] (1) with embodiment 1;

[0057] (2) with embodiment 1;

[0058] (3) with embodiment 1;

[0059] (4) with embodiment 1;

[0060] (5) with embodiment 1

[0061] (6) Preparation of spinning solution: the polyvinylidene fluoride solution obtained in step (1), the polymer gel / palladium nanoparticle hybrid dispersion obtained in step (4) and the pore-forming agent solution obtained in step (5) Mix according to mass ratio 80:20:0, dissolve, degas, obtain 15wt% spinning solution;

[0062] (7) with embodiment 1;

[0063] (8) with embodiment 1;

[0064] (9) Hybrid membrane preparation: adopt dry-wet spinning method, use hollow fiber spinning machine ( figure 1 ) and the core liquid prepared by the above step (7) and the coagulation bath prepared by the above step (8), in a dry spinning length of 10 cm, the temperature of the spinning solution is 50 ° C, and the temperature of the core liquid and the coagulation bath is 30 ° C. (6) The obtained spinning solution is spun to ...

Embodiment 3

[0066] (1) with embodiment 1;

[0067] (2) with embodiment 1;

[0068] (3) with embodiment 1;

[0069] (4) with embodiment 1;

[0070] (5) with embodiment 1;

[0071] (6) Preparation of spinning solution: the polyvinylidene fluoride solution obtained in step (1), the polymer gel / palladium nanoparticle hybrid dispersion obtained in step (4) and the pore-forming agent solution obtained in step (5) Mix according to mass ratio 60:40:0, dissolve, degas, obtain 15wt% spinning solution;

[0072] (7) with embodiment 1;

[0073] (8) with embodiment 1;

[0074] (9) Hybrid membrane preparation: adopt dry-wet spinning method, use hollow fiber spinning machine ( figure 1 ) and the core liquid prepared by the above step (7) and the coagulation bath prepared by the above step (8), at a dry spinning length of 25 cm, a temperature of the spinning solution of 50 ° C, and a temperature of the core liquid and the coagulation bath of 30 ° C, the above steps (6) The obtained spinning solutio...

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Abstract

The invention relates to a polyvinylidene fluoride / palladium nanoparticle hybrid hollow fiber membrane and a preparation method thereof. With combination of hydrophilicity of a polymer gel, high catalytic activity of palladium nanoparticles, and corrosion resistance and good film-forming property of polyvinylidene fluoride, the hybrid hollow fiber membrane with good anti-pollution ability, high catalytic activity and good separation property is prepared. The hollow fiber membrane can be used for catalyzing a reduction reaction of nitro in amino nitrobenzene, nitrophenol, nitrobenzene, methyl nitrobenzene, dimethyl nitrobenzene, cyano nitrobenzene, chloronitrobenzene, vinyl nitrobenzene, nitrocyclohexane and other molecules to transform nitro into amino. At the same time, the hollow fiber membrane also can be used for separation of different-size substances in a liquid mixture.

Description

technical field [0001] The invention relates to a polyvinylidene fluoride / palladium nanoparticle hybrid membrane and a preparation method thereof, specifically a polyvinylidene fluoride obtained by blending a polymer gel / palladium nanoparticle hybrid and polyvinylidene fluoride (PVDF) A hybrid hollow fiber membrane and a preparation method thereof belong to the field of polymer science and technology. Background technique [0002] Polyvinylidene fluoride (PVDF) has excellent aging resistance and UV resistance, and has good chemical stability. It is not corroded by strong oxidants such as acids and alkalis and halogens at room temperature. It also has excellent thermal stability and mechanical strength. It is a Separation membrane material with good comprehensive performance. PVDF is made of hollow fiber membrane, which has high membrane specific surface area and packing density, and has been widely used in chemical, biochemical, electronic, food, textile and other industria...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/08B01D67/00B01J31/06C07B43/04D01D5/24
Inventor 陈熙陈莉何洋毕世胤杨鹏赵博武
Owner TIANJIN POLYTECHNIC UNIV
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