Preparation method for CaSi2O2N2:Eu<2+> fluorescence nano-fiber
A technology of fluorescent nanofibers and calcium nitrate, applied in fiber treatment, fiber chemical characteristics, spinning solution preparation, etc., to achieve good fiber shape, simple method, and good application prospects
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Embodiment 1
[0024] Dissolve 1.4mmol calcium nitrate, 0.07mmol europium nitrate in 20ml alcohol-water mixed solvent (V 醇 / V 水 =8.5:1.5). Add 2.8mmol tetraethyl orthosilicate dropwise to the above solution under stirring, continue stirring for 0.5h, then add 1.6g polyvinylpyrrolidone (M w =1300000) to adjust the viscosity of the solution, continue stirring for 0.5h, and finally obtain a uniform and transparent spinning solution. Fill the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use the aluminum foil as the receiving device, connect it to the cathode, the voltage is 8kV, and the distance between the spinning needle and the receiving aluminum foil is 15cm. The pushing speed of the peristaltic pump was 8 μl / min. After 0.5 h of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electrospinning were put into a high-tempera...
Embodiment 2
[0026] Dissolve 2.0mmol calcium nitrate and 0.10mmol europium nitrate in alcohol-water mixed solvent (V 醇 / V 水 =9:1). Under vigorous stirring, 4.0mmol tetraethyl orthosilicate was added dropwise to the above solution, and after continuous stirring for 2h, 2.0g polyvinylpyrrolidone (M w =40000) to adjust the viscosity of the solution, and then continue to stir for 2h to finally obtain a uniform and transparent spinning solution. Fill the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use the aluminum foil as the receiving device, connect it to the cathode, the voltage is 12kV, and the distance between the spinning needle and the receiving aluminum foil is 20cm. The pushing speed of the peristaltic pump was 20 μl / min. After 4 h of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electrospinning were put into a...
Embodiment 3
[0028] Dissolve 3.0mmol calcium nitrate and 0.10mmol europium nitrate in alcohol-water mixed solvent (V 醇 / V 水 =8.5:1.5). Under vigorous stirring, 9.0mmol tetraethyl orthosilicate was added dropwise to the above solution, and after continuous stirring for 1h, 2.0g polyvinylpyrrolidone (M w =40000) to adjust the viscosity of the solution, and then continue stirring for 1 h to finally obtain a uniform and transparent spinning solution. Fill the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use the aluminum foil as the receiving device, connect it to the cathode, the voltage is 10kV, and the distance between the spinning needle and the receiving aluminum foil is 16cm. The pushing speed of the peristaltic pump was 14 μl / min. After 2 h of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electrospinning were put ...
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