Preparation method and application of core-shell composite fluorescent fiber
A composite fluorescence, core-shell technology, applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve the problem of uneven coating on the surface of composite fiber bundles
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Embodiment 1
[0037] The preparation of a core-shell type polyimide-glass fiber composite fluorescent fiber containing pyrene, its basic steps are as follows:
[0038] (1) Add pyrene-containing polyimide, DMAc and ethanol in the reaction flask, and slightly shake to make the polymer fully dissolve; wherein the volume ratio of DMAc and ethanol is 9:1, and the preparation of a pyrene-containing polyimide with a mass concentration of 18wt% imide solution.
[0039] (2) The above-mentioned 18wt% pyrene-containing polyimide solution is used as a spinning solution, and is sprayed on the surface of the glass fiber bundle by an electrospinning method to form a coating film, and the receiving device adopted is a speed-adjustable and rotatable receiving device.
[0040] The electrospinning process used in this embodiment is as follows: take 1 mL of spinning solution, adjust the voltage at 12 kV, receive distance at 15 cm, and advance the spinning solution at 2 mL / h, and use the uniaxial rotation metho...
Embodiment 2
[0043] A core-shell type pyrene-containing polyimide-glass fiber composite fluorescent fiber was prepared by preparing an 8 wt% pyrene-containing polyimide solution, and the preparation process was the same as in Example 1.
[0044] The 8 wt% pyrene-containing polyimide solution prepared above was used as a spinning solution, which was sprayed on the surface of glass fibers by electrospinning to form a coating film, and the receiving device used was a speed-adjustable and rotatable receiving device.
[0045] The electrospinning process used in this embodiment is as follows: take 3 mL of spinning solution, adjust the voltage at 12 kV, receive distance 20 cm, advance the spinning solution at 2 mL / h, use multi-filament fixed rotation method, receive device rotating speed 150 r / min, moving speed 5m / h.
[0046] For the core-shell composite fluorescent fiber prepared in this example, the diameter of the glass fiber bundle is 250 μm, and the thickness of the coating film is 150 μm. I...
Embodiment 3
[0048] A core-shell type pyrene-containing polyimide-glass fiber composite fluorescent fiber is prepared by preparing a 25 wt% pyrene-containing polyimide solution, and the preparation process is the same as in Example 1.
[0049] The 25wt% pyrene-containing polyimide solution prepared above was used as the spinning solution, which was sprayed on the surface of the glass fiber bundle by electrospinning to form a coating film, and the receiving device adopted was a speed-adjustable and rotatable receiving device.
[0050] The electrospinning process used in this embodiment is: take 1 mL of spinning solution, adjust the voltage at 12 kV, receive distance 25 cm, and advance the spinning solution at a speed of 2.5 mL / h, and use the uniaxial rotation method, such as figure 1 As shown, the rotating speed of the receiving device is 200r / min, and the moving speed is 10m / h.
[0051] For the core-shell composite fluorescent fiber prepared in this example, the diameter of the glass fiber b...
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