A nickel nanofiber membrane for membrane catalysis and preparation method thereof

A nanofiber membrane and nanofiber technology, which is applied in chemical instruments and methods, fiber treatment, physical/chemical process catalysts, etc., can solve the problem of high activity and high-efficiency catalytic functions of supported nickel-based catalysts, as well as mass production and reduction Problems such as the number of NiB particles, the effective catalytic area, and the complex use process of supported catalysts have achieved the effect of easy to achieve large-scale preparation, improving catalytic efficiency and improving catalytic performance

Active Publication Date: 2018-01-12
佛山市维晨科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the above example is that: the same as most of the existing loads, the porosity of the ion exchange resin is low, so that the catalytic efficiency of the loaded nano-nickel is still not high enough; in addition, the type of ion exchange resin depends on the use environment, Using this material as a support makes the use of supported catalysts complicated
[0007] The disadvantage of the above example is that NiB particles and PVDF nanofibers are blended and combined, and it is difficult to avoid being burdened by polymers, thereby greatly reducing the number of NiB particles exposed on the surface and the effective catalytic area; in addition, the electrospinning method The yield of the produced nanofibers is low, making it difficult to achieve large-scale production
[0008] In summary, the existing preparation methods are difficult to achieve high activity, high-efficiency catalytic function and macro-scale preparation of supported nickel-based catalysts, and the emergence of related new technologies is urgently needed

Method used

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  • A nickel nanofiber membrane for membrane catalysis and preparation method thereof
  • A nickel nanofiber membrane for membrane catalysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of nickel nanofiber membrane for membrane catalysis, including the following steps:

[0036] 1) 0.2kg of thermoplastic polymer PVA-co-PE and 3.8kg of cellulose acetate butyrate are uniformly mixed, extruded and pelletized in a twin-screw extruder with a processing temperature of 170°C to prepare PVA -co-PE / cellulose acetate butyrate composite material.

[0037] 2) The PVA-co-PE / cellulose acetate butyrate composite material obtained in step 1) is drawn by a melt spinning machine and spun to obtain a composite fiber;

[0038] 3) The composite fiber is refluxed in acetone at 60°C for 72 hours to extract cellulose acetate butyrate, and the composite fiber after the cellulose acetate butyrate is extracted is dried at room temperature to prepare PVA-co-PE nanofibers with an average diameter of 50 nm .

[0039] 4) Take 0.5g of PVA-co-PE nanofiber and disperse it in 500ml of ethanol to form a nanofiber dispersion, and then coat the nanofiber dispersion on the surf...

Embodiment 2

[0049] A preparation method of nickel nanofiber membrane for membrane catalysis, including the following steps:

[0050] 1) 0.5kg of thermoplastic polymer PVA-co-PE and 4kg of cellulose acetate butyrate are uniformly mixed, and extruded and pelletized in a twin-screw extruder with a processing temperature of 170°C to prepare PVA- co-PE / cellulose acetate butyrate composite material.

[0051] 2) The PVA-co-PE / cellulose acetate butyrate composite material obtained in step 1) is drawn by a melt spinning machine and spun to obtain a composite fiber;

[0052] 3) The composite fiber was refluxed in acetone at 60°C for 72 hours to extract cellulose acetate butyrate, and the composite fiber after extraction of cellulose acetate butyrate was dried at room temperature to prepare PVA-co-PE nanofibers with an average diameter of 100 nm .

[0053] 4) Disperse 0.7g of PVA-co-PE nanofibers in 700ml of ethanol to form a nanofiber dispersion, then coat the nanofiber dispersion on the surface of a smoo...

Embodiment 3

[0063] A preparation method of nickel nanofiber membrane for membrane catalysis, including the following steps:

[0064] 1) 1kg of thermoplastic polymer PVA-co-PE and 4kg of cellulose acetate butyrate are uniformly mixed, extruded and pelletized in a twin-screw extruder with a processing temperature of 170°C to prepare PVA-co -PE / cellulose acetate butyrate composite material.

[0065] 2) The PVA-co-PE / cellulose acetate butyrate composite material obtained in step 1) is drawn and spun by a melt spinning machine to obtain a composite fiber.

[0066] 3) The composite fiber was refluxed in acetone at 60°C for 72 hours to extract cellulose acetate butyrate, and the composite fiber after extracting cellulose acetate butyrate was dried at room temperature to prepare PVA-co-PE nanofibers with an average diameter of 200 nm .

[0067] 4) Disperse 0.5g of PVA-co-PE nanofibers in 500ml of ethanol to form a nanofiber dispersion, and then coat the nanofiber dispersion on the surface of a smooth pl...

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Abstract

The invention relates to a nickel nanofiber membrane for membrane catalysis. The nickel nanofiber membrane is composed of a thermoplastic polymer nanofiber membrane and a nickel nanofilm chemically deposited on the surface of the thermoplastic polymer nanofiber, and each component is in the following mass percentage: thermoplastic polymer 14-75% of nano-fiber film and 25-86% of nickel nano-film. The preparation process adopts melt blending and spinning of thermoplastic polymer and cellulose acetate butyrate in proportion, and prepares thermoplastic polymer nanofibers through solvent extraction, and then disperses and coats the surface of smooth substrate, and obtains thermoplastic polymer after drying and removing. nanofiber membranes. After the nanofiber membrane is sensitized and activated, it is placed in a nickel bath with a certain formula for electroless nickel plating, taken out and dried to obtain the nickel nanofiber membrane for membrane catalysis. The invention has simple process, low cost and easy realization of large-scale preparation. The nickel nanofiber membrane for membrane catalysis has the characteristics of high porosity, controllable pore size, large flux, high catalytic activity and easy separation.

Description

Technical field [0001] The invention relates to a nickel nanofiber membrane for membrane catalysis and a preparation method thereof, belonging to the field of catalyst preparation. Background technique [0002] The development of modern industry produces a lot of sewage, which contains a lot of harmful substances. For example, p-nitrophenol is a toxic pollutant, which can be converted into p-aminophenol by catalysis, which can be used in the pharmaceutical and chemical fields to turn waste into treasure. Nickel is an important catalyst for the hydrogenation and reduction of p-nitrophenol to p-aminophenol. In addition, the use of nickel as a catalyst is also a common and effective method in the preparation of hydrogen and the synthesis of nano-carbon materials. Nickel catalysts include two types: one is non-supported catalysts, mainly consisting of skeletal nickel and nano-nickel particles, and the other is supported catalysts. The supports used are mainly mesoporous carbon, MCM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06D06M11/83D06M101/24D06M101/20D06M101/34D06M101/32D06M101/38
Inventor 刘轲汪元王栋程盼刘琼珍李沐芳蒋海青
Owner 佛山市维晨科技有限公司
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