A preparation method of polypyrrole/polyimide composite fiber based on molecular assembly and its products
A polyimide, composite fiber technology, applied in fiber processing, conjugated synthetic polymer rayon, filament/thread forming, etc., can solve problems such as mechanical properties decline
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[0029] The invention provides a method for preparing polypyrrole / polyimide composite fiber based on molecular assembly. include:
[0030] Provide an ammonium carboxylate solution comprising at least a tetrabasic acid and a tetrabasic amine to prepare a polypyrrone precursor solution;
[0031] Adding polyamic acid to the above polypyrrone precursor solution to obtain a spinning solution, and electrospinning to obtain a composite nanofiber precursor;
[0032] The above-mentioned composite nanofiber precursor is heat-treated at high temperature to prepare a polypyrrole / polyimide composite fiber.
[0033] In one embodiment, in the polypyrrolone precursor solution, the molar ratio of tetrabasic acid to tetrabasic acid is 0.8:1 to 1:0.8; preferably, the molar ratio of tetrabasic acid to tetrabasic amine is 1:1.
[0034] In one embodiment, the polyamic acid solution is prepared by reacting triamine and tetraacid dianhydride in a solvent under the protection of nitrogen.
[0035] ...
Embodiment 1
[0107]A1 and B2 were dissolved in DMAC at a molar ratio of 1:1, the concentration was controlled between 15% and 20%, and magnetically stirred for 2 hours to obtain an acid ammonium salt solution. Add C1 with an intrinsic viscosity of 3dl / g to make the concentration of C1 in the polypyrrole precursor solution about 0.15% to 0.2%, and add the polyaniline oligomer polypyrrole precursor solution to a concentration of about 0.02% to make it After stirring for 4 hours to make it evenly mixed, adjust the total concentration of A1, B2, C1 and aniline oligomers in the solution to be 10%-15%, to prepare a spinning solution.
[0108] The spinning solution prepared above was subjected to electrospinning, the spinning voltage was controlled to be 15KV for the positive pole, -2KV for the negative pole, and the distance from the needle tip to the receiving device was 25cm. The composite material nanofiber film was collected by using a slowly rotating drum, A high-speed rotating flywheel col...
Embodiment 2
[0111] A2 and B1 were dissolved in DMAC with a molar ratio of 1:1, the concentration was controlled between 20% and 25%, and magnetically stirred for 2 hours to obtain an acid ammonium salt solution. Add C2 with an intrinsic viscosity of 3dl / g, so that the concentration of C2 in the polypyrrole precursor solution is about 0.4% to 0.5%, and add the polyaniline oligomer polypyrrole precursor solution to a concentration of about 0.03%, so that it After stirring for 4 hours to make it uniformly mixed, adjust the total concentration of A2, B1, C2 and aniline oligomers in the solution to be 20%-25%, to prepare a spinning solution.
[0112] The spinning solution prepared above was subjected to electrospinning, the spinning voltage was controlled to be 15KV for the positive pole, -8KV for the negative pole, and the distance from the needle tip to the receiving device was 25cm. The composite material nanofiber film was collected by using a slow-rotating drum , a high-speed rotating fly...
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Abstract
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