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Method for preparing polyaniline and nano-fibre blend composite film

A nanofiber and polyaniline technology, applied in the field of ultrafiltration composite membrane preparation, can solve the problem of not seeing polyaniline nanocomposite membrane, etc., and achieve the effects of improved anti-membrane fouling ability, low cost and simple process

Inactive Publication Date: 2008-10-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no other relevant reports on the research of polyaniline nanocomposite membrane technology

Method used

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  • Method for preparing polyaniline and nano-fibre blend composite film
  • Method for preparing polyaniline and nano-fibre blend composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0013] (1) Take 8.47ml of concentrated hydrochloric acid, dilute it to 100ml with deionized water, and prepare a 1M hydrochloric acid solution; measure 2.92ml of aniline and dissolve it in 100ml of 1M hydrochloric acid solution, make it into a hydrochloric acid solution of 0.32M aniline, and denote it as solution A; Dissolve 1.824g of ammonium persulfate in 100ml of 1M hydrochloric acid solution to prepare a 0.32M ammonium persulfate hydrochloric acid solution, denoted as solution B; quickly mix the two solutions A and B, shake for 30 seconds, and let stand for 4~ 6 hours; the polyaniline nanofibers were separated by suction filtration with a 0.22 μm microporous membrane, washed with deionized water, methanol and concentrated hydrochloric acid, and dried in vacuum at 25°C for 4 hours to obtain polyaniline nanofibers with an average diameter of 43 nm and an average length of 259 nm. fiber.

[0014] (2) Weigh 0.15 g of polyaniline nanofibers, place them in 8.35 g of solvent N,N-...

Embodiment 2

[0017] Polyaniline nanofibers were prepared according to step (1) in Example 1; 0.015 g of polyaniline nanofibers were weighed, placed in 8.485 g of solvent N,N-dimethylacetamide (DMAc), and subjected to magnetic stirring at 120 r / min and Under the condition of ultrasonic frequency 45Hz, the nanofibers are uniformly dispersed; 1.50g of polysulfone is added to the dispersion liquid of polyaniline nanofiber-N,N-dimethylacetamide, and stirred until it is completely dissolved to obtain 10g of casting liquid, which is left to stand for 8 For more than 1 hour, remove the bubbles in the casting liquid; in the environment of temperature 25 ℃, relative humidity 60%, scrape the film on the glass plate with a film scraper, control the thickness of the film liquid to 300 μm; after 30 seconds, immerse the glass plate in The polyaniline nanofiber blended composite membrane was obtained by placing it in deionized water at 25° C. for more than 4 hours, which was immersed in pure water for pres...

Embodiment 3

[0020] Polyaniline nanofibers were prepared according to step (1) in Example 1; 0.12 g of polyaniline nanofibers were weighed and placed in a solvent of 8.68 g of dimethylformamide. The fibers are uniformly dispersed; 1.20 g of polysulfone is added to the dispersion liquid of polyaniline nanofiber-dimethylformamide, and stirred until completely dissolved to obtain 10 g of a casting liquid, which is allowed to stand for more than 8 hours to remove bubbles in the casting liquid; Under the environment of temperature 24°C and relative humidity 45%, use a doctor blade to scrape the glass plate to form a film, and control the thickness of the film liquid to 300μm; after 30 seconds, immerse the glass plate in deionized water at 24°C and let it stand for more than 4 hours , to obtain a polyaniline nanofiber blended composite membrane, which was immersed in pure water for preservation.

[0021] The obtained polyaniline nanofiber blended composite membrane has a pure water flux of 344 t...

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Abstract

The invention discloses a preparation method of poly-aniline nano-fibre co-mixing composite film, belonging to the preparation technique of ultra-filter composite film. The method process comprises that poly-aniline nano-fibre is dispersed to one or more out of solvent N, N-dimethylacetamide, dimethylformamide, N-cymene-2-pyrazolidinone or dimethyl sulfoxide; film-forming polymer material polysulfone is uniformly dissolved into the dispersion of the poly-aniline nano-fibre-solvent to gain casting solution; the casting solution is scraped on a glass plate and the film is formed by using water as coagulation bath, so as to gain the poly-aniline nano-fibre co-mixing composite film of the invention with high throughput and high pollution resistance. The preparation method of the poly-aniline nano-fibre co-mixing composite film has simple method, easy operation and low cost; the pure water throughput of the prepared poly-aniline nano-fibre co-mixing composite film is 1.6 to 2.3 times of that of pure polysulfone membrane and the throughput preservation rate of the poly-aniline nano-fibre co-mixing composite film on protein solution is 1.2 to1.5 times of that of the pure polysulfone membrane.

Description

technical field [0001] The invention relates to a preparation method of a polyaniline nanofiber blended composite membrane, which belongs to the preparation technology of an ultrafiltration composite membrane. Background technique [0002] At present, polysulfone (PS), a widely used membrane material in industry, has the characteristics of good chemical stability, mechanical properties, heat resistance, acid and alkali resistance, etc., but it is difficult to take into account high flux, high rejection rate and high Therefore, the modification of polysulfone membrane materials has become a research hotspot. The current modification methods mainly include surface chemical reaction modification, plasma modification, irradiation graft modification, surfactant modification, blend modification and so on. Among them, the blending modification has the advantages of simple method, easy control, good film stability, and can retain the respective characteristics of various polymers a...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D69/06B01D71/68
Inventor 王志樊智锋孙宁王纪孝王世昌
Owner TIANJIN UNIV
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