Low-cost composite fluorescent nano-fiber thin film with high selectivity for detecting TNT as well as preparation method and application thereof
A nanofiber, high-selectivity technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, it can solve the problems of low response efficiency and no detection of strong explosive substances TNT, and achieve fine diameters. , Wide application, large specific surface area
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Embodiment 1
[0024] Firstly, 9 mg of PyCz fluorescent probe and 455 mg of PNIPAM polymer were dissolved in 4 mL of DMF solution and vigorously stirred at 10 °C to form a 2 wt % transparent and uniform electrospinning solution. Put the electrospun polymer solution into a 2mL disposable syringe, apply a DC voltage of 10kV to a stainless steel needle with an inner diameter of 0.6mm through electrospinning technology, and inject the polymer solution at a flow rate of 0.003mm / s, and the receiver The distance from the needle is 15cm, the air humidity is 30%HR, and the temperature is 10°C for electrospinning. The fiber is deposited on a 5mm × 25mm × 1mm quartz plate placed on the aluminum foil to obtain a PNIPAM / PyCz nanofiber film. Receive 5min.
[0025] The experimental steps for detecting explosive vapor are as follows: First, take 15 mg of 2,4,6-trinitrotoluene, urea, naphthalene, and sodium nitrite respectively and put them into a cylindrical (diameter φ5mm×height 3mm) aluminum container and...
Embodiment 2
[0033] Firstly, 2.5 mg of PyCz fluorescent probe and 240 mg of PNIPAM polymer were dissolved in 2 mL of DMF solution and vigorously stirred at 10 °C to form a 1 wt % transparent and uniform electrospinning solution. Put the electrospun polymer solution into a 2mL disposable syringe, apply a DC voltage of 10kV to a stainless steel needle with an inner diameter of 0.6mm through electrospinning technology, and inject the polymer solution at a flow rate of 0.003mm / s, and the receiver The distance from the needle is 15cm, the air humidity is 30%HR, and the temperature is 10°C for electrospinning. The fiber is deposited on a 5mm×25mm×1mm quartz plate placed on aluminum foil to obtain PNIPAM / PyCz nanofibers. The time is 5 minutes.
[0034] The experimental steps for detecting explosive vapor are as follows: First, take 15 mg of 2,4,6-trinitrotoluene, urea, naphthalene, and sodium nitrite respectively and put them into a cylindrical (diameter φ5mm×height 3mm) aluminum container and co...
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