Polyacrylonitrile nanofiber membrane and its preparation method, flexible piezoelectric nanogenerator and its preparation method
A nanofiber membrane and nanogenerator technology, applied in the field of piezoelectric materials, can solve the problems of high dielectric loss, low glass transition temperature, expensive and difficult to obtain, etc., achieve low dielectric loss, high glass transition temperature, reduce The effect of preparation costs
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[0031] The invention provides a method for preparing a polyacrylonitrile nanofiber membrane, comprising:
[0032] Under the voltage condition of 20-22kV, the polyacrylonitrile powder liquid is subjected to drum electrospinning to obtain the polyacrylonitrile nanofiber membrane.
[0033] The present invention preferably first provides polyacrylonitrile powder stock liquid, and described polyacrylonitrile powder stock liquid preferably comprises polyacrylonitrile powder material and solvent, and described polyacrylonitrile powder material comprises 3 1 - polyacrylonitrile in helical conformation and polyacrylonitrile in planar zigzag conformation, such as figure 1 as shown, figure 1 Among them, a is the planar sawtooth conformation, b is 3 1 - Helical conformation. In the embodiment of the present invention, the polyacrylonitrile powder is a commercially available product known to those skilled in the art, wherein the mass content of polyacrylonitrile with a planar zigzag con...
Embodiment 1
[0060] Put polyacrylonitrile (PAN) powder (in which planar sawtooth conformation accounts for 65.4%) and N,N-dimethylformamide (DMF) into a conical flask, stir in a water bath at 50°C for 8 hours, and prepare the mass concentration Be 12% polyacrylonitrile powder liquid, put into syringe for subsequent use;
[0061] The metal-insulation composite layer is a polyethylene terephthalate (PET) film sprayed with gold on one side, the film thickness is 80 μm, and the spraying thickness is 500nm, for subsequent use;
[0062] use as figure 2 The electrospinning device shown prepares PAN nanofiber film (polyacrylonitrile nanofiber film), and the specific operation is as follows: use double-sided adhesive tape to release the liner (which does not hinder the formation of an electric field between the cylinder and the auxiliary electrode, and is also easy to spin the film). Completely removed after successful production) fixed on the cylinder of the electrospinning machine, the electros...
Embodiment 2～3
[0065] Adjust the operating parameters of drum electrospinning and the thickness and size parameters of the polyacrylonitrile nanofiber membrane to prepare different flexible piezoelectric nanogenerators. Others are the same as in Example 1.
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Abstract
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