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Preparation method of electrospun high-performance polyphenylene derivative nanofibers

A technology of polyphenylene derivatives and nanofibers, which is applied in the chemical characteristics of fibers, single-component synthetic polymer rayon, textiles and papermaking, etc., can solve the problem that polyphenylene derivatives are not soluble and difficult to prepare electrospun nanofibers , low molecular weight of polyphenylene derivatives, etc., to achieve the effect of high strength, high modulus and moderate elongation

Active Publication Date: 2018-12-21
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But even if a huge benzoyl group is introduced on the main chain benzene ring, the solubility of this polyphenylene derivative in organic solvents is still not large. Low, it is difficult to prepare electrospun nanofibers

Method used

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  • Preparation method of electrospun high-performance polyphenylene derivative nanofibers
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  • Preparation method of electrospun high-performance polyphenylene derivative nanofibers

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preparation example Construction

[0033] The invention provides a method for preparing electrospun high-performance polyphenylene derivative nanofibers, comprising the following steps:

[0034] (1) dissolving substituted benzene oligomers and aromatic tetraamine monomers terminated by o-dicarboxybenzene in a solvent to prepare a precursor solution;

[0035] (2) In the precursor solution described in step (1), add a filament forming agent to form a spinning mixed solution, and form a blended nanofiber precursor by an electrospinning method;

[0036] (3) After drying the blended nanofiber precursor described in step (2), heat treatment is performed to obtain polyphenylene derivative nanofibers.

[0037] Odicarboxybenzene-terminated substituted benzene oligomers:

[0038] The general structural formula of the substituted benzene oligomers end-capped by o-dicarboxybenzene described in the present invention:

[0039]

[0040] where R 1 Choose from any of the following structures:

[0041] CH 3 O-; R 1 p...

Embodiment 1

[0069] At room temperature, the molar ratio of 1:1 with Add o-dicarboxybenzene-terminated substituted benzene oligomers and 3,3',4,4'-biphenyltetramine as substituent groups into N,N-dimethylformamide solution, and magnetically stir for 2 hours to form Mix the solution and label it as A solution.

[0070] In solution A, weigh an appropriate amount of PVP (Mr=30000) to prepare a solution with a concentration of 30%. Stir magnetically at room temperature for 1 h, let stand for 1 h, and label the resulting solution as B solution.

[0071] Place the prepared B solution in the spinning device, adjust the solidification distance to 14cm and the voltage to 21kV, connect the negative electrode to the wire mesh, and the polyphenylene nanofiber precursor will be collected on the wire mesh as the negative electrode.

[0072] The obtained polyphenylene nanofiber precursor was dried under reduced pressure at 40°C, and heated to 420°C under nitrogen to obtain polyphenylene nanofibers wit...

Embodiment 2

[0083] At room temperature, the molar ratio of 1:1 with Add o-dicarboxybenzene-terminated substituted benzene oligomers and 3,3',5,5'-benzophenonetetramine as substituent groups to N,N-dimethylformamide solution, and magnetically stir for 2h, A mixed solution was formed and labeled as A solution.

[0084] In solution A, weigh an appropriate amount of PMMA to prepare a solution with a concentration of 40%. Stir magnetically at room temperature for 1 h, let stand for 1 h, and label the resulting solution as B solution.

[0085] Place the prepared B solution in the spinning device, adjust the curing distance to 16cm and the voltage to 25kV, connect the negative electrode to the wire mesh, and the polyphenylene nanofiber precursor will be collected on the wire mesh as the negative electrode.

[0086] The obtained polyphenylene nanofiber precursor was dried under reduced pressure at 50°C, and heated to 450°C under nitrogen to obtain polyphenylene nanofibers with benzimidazole as...

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Abstract

The invention discloses a method for preparing electrospun high-performance polyphenylene derivative nanofibers, comprising the following steps: (1) dissolving o-dicarboxybenzene-terminated substituted benzene oligomers and aromatic tetraamine monomers in a solvent, Prepare the precursor solution; (2) add a filament forming agent to the above precursor solution to form a spinning mixed solution, and form a blended nanofiber precursor by electrospinning; (3) process the above blended nanofiber precursor After drying, heat treatment is performed to obtain polyphenylene derivative nanofibers. The method overcomes the disadvantages that the molecular weight of the polyphenylene derivative obtained by the general synthesis method is relatively low, and it is difficult to prepare high-performance polyphenylene derivative nanofibers. The polyphenylene derivative nanofiber obtained by the method has good mechanical properties such as high toughness, high strength, high modulus, moderate elongation and the like.

Description

technical field [0001] The invention relates to a method for preparing polyphenylene derivative nanofibers, more specifically, the invention relates to a method for preparing polyphenylene derivative nanofibers by electrospinning. Background technique [0002] Polyphenylene is a kind of rigid chain polymer linked by phenyl groups. It has excellent high temperature resistance. The thermal decomposition temperature in nitrogen is as high as 900 ° C. It can be used for a long time at 400 ° C. It has excellent chemical corrosion resistance and friction resistance. , radiation resistance and other characteristics; at the same time, it has good electrical properties and self-lubricating properties better than graphite. Polyphenylene can be used as high temperature-resistant, radiation-resistant coatings or adhesives, high-temperature wear-resistant parts, ablation-resistant materials, etc. It can be used in chemical equipment, aerospace equipment, high-speed operating weapons unde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/76D01F6/60
CPCD01F6/605D01F6/76
Inventor 侯豪情许文慧李春根朱咏梅
Owner JIANGXI NORMAL UNIV
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