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Preparation method of polyimide nanofiber membrane containing porphyrin and application

A nanofiber membrane, polyimide technology, applied in fiber processing, filament/thread forming, textile and papermaking, etc., to achieve the effect of easy sampling and intuitive detection process

Inactive Publication Date: 2011-03-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on domestic patents on porphyrin-containing polyimides

Method used

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  • Preparation method of polyimide nanofiber membrane containing porphyrin and application
  • Preparation method of polyimide nanofiber membrane containing porphyrin and application
  • Preparation method of polyimide nanofiber membrane containing porphyrin and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Synthesis of porphyrin-containing polyamic acid

[0053] Under the protection of nitrogen, 5,15-diaminotetraphenylporphyrin (trans-DATPP) and 4,4'-diaminodiphenyl ether (ODA) with a molar ratio of 0.05:1 were used as diamine monomers in an ice-water bath , dissolved in N,N-dimethylacetamide (DMAc), and electromagnetically stirred to dissolve it to obtain a reaction system; then pyromellitic dianhydride (PMDA ) monomer was added to the reaction system twice, with an interval of half an hour between the two additions. After continuing to react in an ice-water bath for 4 hours, the reaction was continued for 16 hours at room temperature, and the reactant was poured into anhydrous methanol to obtain a reddish-brown Precipitation: The reddish-brown precipitate was repeatedly washed with methanol by suction filtration, and then dried in a vacuum oven at 60° C. to obtain a porphyrin-containing polyamic acid.

[0054] (2) Preparation of polyamic acid nanofiber membrane con...

Embodiment 2

[0062] (1) Synthesis of porphyrin-containing polyamic acid

[0063] Under nitrogen protection, in an ice-water bath, 5,15-diaminotetraphenylporphyrin (trans-DATPP) and all-para-triphenylenediamine (BAPB) with a molar ratio of 0.1:1 were used as diamine monomers, Dissolved in N,N-dimethylacetamide (DMAc), electromagnetically stirred to dissolve it to obtain a reaction system; then add pyromellitic dianhydride (PMDA) The monomer was added to the reaction system twice, with an interval of half an hour between the two additions. After continuing to react in an ice-water bath for 5 hours, the reaction was continued for 16 hours at room temperature, and the reactant was poured into anhydrous methanol to obtain a reddish-brown precipitate. ; The reddish-brown precipitate was repeatedly washed by suction filtration with methanol, and then dried in a vacuum oven at 60°C to obtain polyamic acid containing porphyrin.

[0064] (2) Preparation of polyamic acid nanofiber membrane containin...

Embodiment 3

[0072] (1) Synthesis of porphyrin-containing polyamic acid

[0073] Under nitrogen protection, 5,15-diaminotetraphenylporphyrin (trans-DATPP) and 4,4'-diaminodiphenyl ether (ODA) with a molar ratio of 0.15:1 were used as diamine monomers in an ice-water bath , dissolved in N, N-dimethylacetamide (DMAc), electromagnetically stirred to dissolve it to obtain a reaction system; then the 3, 3', 4, 4 '-Benzophenone tetra-acid dianhydride (BTDA) monomer was added to the reaction system twice, and the interval between the two additions was half an hour. After continuing to react in the ice-water bath for 6 hours, the reaction continued for 18 hours at room temperature. The reactant was poured into anhydrous methanol to obtain a reddish-brown precipitate, which was repeatedly suction-filtered and washed with methanol, and dried in a vacuum oven at 60°C to obtain a porphyrin-containing polyamic acid.

[0074] (2) Preparation of polyamic acid nanofiber membrane containing porphyrin

[...

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Abstract

The invention discloses polyimide containing porphyrin, and a preparation method of a polyimide nanofiber membrane containing porphyrin. The method comprises the following steps: carrying out condensation reaction on monomers of diamino tetraphenyl porphrin, aromatic organic diamines and aromatic tetracid dianhydride to synthesize the polyimide containing porphyrin; carrying out electrostatic spinning on a polyimide solution containing porphyrin to prepare the polyimide nanofiber membrane containing porphyrin; and performing high-temperature thermal treatment to obtain the nanofiber membrane containing porphyrin. The invention utilizes the special optical characteristics of the porphyrin to combine with the excellent heat resistance and the chemical corrosion of the polyimide to prepare the nanofiber membrane containing porphyrin with the larger surface area. The nanofiber membrane containing porphyrin has the advantages of high sensitivity and quick response when detecting harmful corrosive gas under a high temperature environment, and has the characteristics of simple preparation method, high repeatability and recycling product at the same time.

Description

technical field [0001] The invention relates to a preparation method and application of a nanofiber membrane, in particular to a preparation method of a porphyrin-containing polyimide nanofiber membrane and its application in the trace detection of hydrogen chloride gas in a high-temperature corrosion environment. Background technique [0002] Porphyrins are electron-rich compounds with a macrocyclic conjugated structure. Due to their unique structure, porphyrins are widely used in biochemistry, photoelectrochemistry, medicine, analytical chemistry, catalytic chemistry, and materials chemistry. disciplines and industries. In recent years, with the rapid development of material science, porphyrin as a luminescent material has attracted people's interest, which is closely related to its fluorescence properties. Porphyrin has special optical properties and can emit red fluorescence at a specific excitation wavelength; porphyrin has strong light-absorbing properties, changing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10D01D5/00
Inventor 吴健吕媛媛刘振梅徐志康
Owner ZHEJIANG UNIV
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