A method for the preparation of molecularly assembled polypyrrole nanofibers based on electrospinning
A technology of nanofibers and composite nanofibers, which is applied in the field of preparation of molecularly assembled polypyrrole nanofibers, which can solve the problems of limited processability, strong toxicity, and environmental pollution
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[0030] One aspect of the present invention relates to a preparation method based on electrospinning molecularly assembled polypyrrole nanofibers, comprising the steps of:
[0031] Provide a polypyrrone precursor solution containing a viscosifying polymer;
[0032] Electrospinning the polypyrrolone precursor solution to obtain composite nanofibers;
[0033] The viscosifying polymer in the composite nanofiber is thermally decomposed, and the polypyrrole monomer is first converted into polyamic acid ammonium salt during the heating process, and then converted into polypyrrole nanofiber at the final high temperature.
[0034] Preferably, the polypyrrolone precursor solution that contains viscosifying polymer is provided and comprises:
[0035] providing solutions of ammonium carboxylate salts containing tetraacids and tetraamines, and
[0036] The ammonium carboxylate salt solution and the tackifying polymer solution are blended to form a polypyrrolone precursor solution.
[00...
Embodiment approach 1
[0061] Embodiment 1. The preparation method for preparing polypyrrole nanofibers described in the summary of the present invention comprises the following steps:
[0062] Provide a polypyrrone precursor solution containing a viscosifying polymer;
[0063] Electrospinning the polypyrrone precursor solution to obtain composite nanofibers;
[0064] The viscosifying polymer in the composite nanofiber is thermally decomposed, and the polypyrrole monomer is first converted into polyamic acid ammonium salt during the heating process, and then converted into polypyrrole nanofiber at the final high temperature.
[0065] Embodiment 2. The method of embodiment 1, wherein said providing a polypyrrole precursor solution containing a viscosifying polymer comprises:
[0066] providing solutions of ammonium carboxylate salts containing tetraacids and tetraamines, and
[0067] The ammonium carboxylate salt solution and the tackifying polymer solution are blended to form a polypyrrolone precu...
Embodiment 1
[0092] Dissolve G-1 and A-1 with a molar ratio of 1.01:1 and a total weight of 20 g in 80 g of dimethyl sulfoxide at a temperature lower than 25°C, and stir magnetically for 2 hours to obtain ammonium carboxylate solution.
[0093] Take 10 g of polyvinylpyrrolidone (intrinsic viscosity 3.0) and add it to 90 g of dimethyl sulfoxide, stir for 4 hours to make it evenly mixed, then add the ammonium carboxylate salt solution prepared above, and stir to obtain a mixed solution suitable for spinning.
[0094] The mixed solution prepared above was subjected to electrospinning, the spinning voltage was controlled to be 15KV for the positive electrode, -2KV for the negative electrode, and the distance from the needle tip to the receiving device was 25cm. The resulting fiber-oriented composite nanofiber ribbons are collected using a flywheel rotating at high speed. The obtained composite nanofibrous tapes were dried in vacuum at 60 °C for 6 h.
[0095] The composite nanofiber tape obta...
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