A kind of preparation method of cds/pvdf composite film
A composite film and solution technology, applied in the field of material chemistry, can solve the problems of carbon quantum dots fluorescence self-quenching, reduced transparency of composite materials, etc., and achieves the effects of excellent fluorescence characteristics, improved fluorescence performance, and simple operation and realization process.
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Embodiment 1
[0026] Embodiment 1 A kind of preparation method of CDs / PVDF composite film
[0027] (1) Preparation method
[0028] 1) Weigh 3.08g of citric acid and 4.63ml of diethylenetriamine, dissolve in 80ml of deionized water, stir magnetically for 30min, and then sonicate for 10min. The mixed solution was transferred to a hydrothermal kettle, and the hydrothermal kettle was placed in an oven, heated at 180°C for 5 hours, and cooled to room temperature with the furnace to obtain a carbon quantum dot CDs solution, which was stored in a refrigerator at 4°C for later use.
[0029] 2) Add 0.25ml CDs solution into a 100ml beaker containing 10ml DMF solution, heat to 60°C under magnetic stirring, and stir at 60°C for 30 minutes to obtain CDs / DMF solution.
[0030] 3) Weigh 3.16g of PVDF and dissolve it in 30ml of DMF, heat it in a water bath to 60°C under magnetic stirring, and stir at 60°C for 30 minutes to obtain a PVDF solution.
[0031] 4) Mix the CDs / DMF solution and the PVDF solution...
Embodiment 2
[0038] Example 2 Effect of CDs doping ratio on luminous intensity
[0039] (1) Preparation method
[0040] 1) Weigh 3.08g of citric acid and 4.63ml of diethylenetriamine, dissolve in 80ml of deionized water, stir magnetically for 30min, and then sonicate for 10min. The mixed solution was transferred to a hydrothermal kettle, and the hydrothermal kettle was placed in an oven, heated at 180°C for 5 hours, and cooled to room temperature with the furnace to obtain a carbon quantum dot CDs solution, which was stored in a refrigerator at 4°C for later use.
[0041] 2) Take 0.25ml of CDs solution respectively, add them into beakers containing 5ml, 10ml, 20ml, 40ml, 80ml, and 160ml of DMF solution, heat to 60°C under magnetic stirring, and stir at 60°C for 30 minutes to obtain CDs / DMF solution with a volume ratio of 1:20, 1:40, 1:80, 1:160, 1:320, 1:640.
[0042] 3) Weigh 3.16g of PVDF and dissolve it in 30ml of DMF, heat it in a water bath to 60°C under magnetic stirring, and stir ...
Embodiment 3
[0047] Example 3 Effect of PVDF mass fraction on film luminescence
[0048] (1) Preparation method
[0049] 1) Weigh 3.08g of citric acid and 4.63ml of diethylenetriamine, dissolve in 80ml of deionized water, stir magnetically for 30min, and then sonicate for 10min. The mixed solution was transferred to a hydrothermal kettle, and the hydrothermal kettle was placed in an oven, heated at 180°C for 5 hours, and cooled to room temperature with the furnace to obtain a carbon quantum dot CDs solution, which was stored in a refrigerator at 4°C for later use.
[0050] 2) Add 0.25ml CDs solution into a 100ml beaker containing 10ml DMF solution, heat to 60°C under magnetic stirring, and stir at 60°C for 30 minutes to obtain CDs / DMF solution.
[0051] 3) Weigh 0.525g, 0.788g and 1.05g of PVDF and dissolve them in 10ml of DMF, heat them in a water bath to 60°C under magnetic stirring, and stir at 60°C for 30 minutes to obtain PVDF content of 5wt%, respectively. 7.5wt% and 10wt% PVDF sol...
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