Application of developing fingerprint in conjugated polymer fluorescent material and fingerprint developing method
A conjugated polymer, fluorescent material technology, applied in applications, medical science, sensors, etc., can solve the problems of not easy to carry, can not excite fluorescence, etc., achieve the effect of simple operation, obvious details, and reduce the requirements of instruments and equipment
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Embodiment 1
[0030] This embodiment provides a fingerprint on a glass sheet, which is developed separately with a polymer fluorescent nanoparticle suspension to obtain fingerprint pictures of different colors under ultraviolet light. The specific steps are as follows:
[0031] 1. The preparation of polyparaphenylene vinylene series nanoparticle colloidal solution PPV-NP-N, the specific preparation method is as follows:
[0032] (1) To prepare poly(p-phenylenevinylene) precursor solution (pre-PPV), take 5 mL and put it into a 50 mL two-necked flask under anaerobic conditions, add 15 mL of deionized water to dilute, then add 60 mL of methanol solution, After reacting for 0 h, 12 h, 24 h, 48 h, and 72 h respectively, under reduced pressure, control the temperature of the water bath at 35°C, and remove methanol by rotary steaming for 30 min to obtain about 20 mL of pre-PPV-N (wherein N Recorded as 0, 1, 2, 3, 4, corresponding to different methanol reaction times);
[0033] (2) Take 5 mL of th...
Embodiment 2
[0042] This embodiment provides a fingerprint on the surface of aluminum foil, which is developed separately with a polymer fluorescent nanoparticle suspension to obtain fingerprint pictures of different colors under ultraviolet light. The specific steps are as follows:
[0043] 1. Prepare polyparaphenylene vinylene series nanoparticle colloidal solution PPV-NP-N according to the method of Example 1 (wherein, N can be recorded as 0, 1, 2, 3 and 4, respectively corresponding to different methanol reaction times ). The prepared PPV-NP-N nanoparticle colloidal solution is stored in a dark and cool place.
[0044] 2. Put the aluminum foil with fingerprints into a 500 mL beaker, add 5 to 8 drops of 502 glue, and then put it in an oven at 60 °C for 40 min to 2 h. If the visible degree is not enough for dyeing, add a little 502 glue and continue to fumigate).
[0045] 3. Use absorbent cotton to absorb a little PPV-NP-N nanoparticle colloid solution, and gently smear it on the stain...
Embodiment 3
[0050] This embodiment provides a fingerprint on the surface of the tempered film of the mobile phone, which is developed separately with a suspension of polymer fluorescent nanoparticles to obtain fingerprint pictures of different colors under ultraviolet light. The specific steps are as follows:
[0051] 1. Prepare polyparaphenylene vinylene series nanoparticle colloidal solution PPV-NP-N according to the method of Example 1 (wherein, N can be recorded as 0, 1, 2, 3 and 4, respectively corresponding to different methanol reaction times ). The prepared PPV-NP-N nanoparticle colloidal solution is stored in a dark and cool place.
[0052] 2. Put the tempered film with fingerprints into a 500 mL beaker, add 5 to 8 drops of 502 glue, and then put it in an oven at 60°C for fumigation. The fumigation time is 40 min to 2 h (if once If the degree of fumigation is not enough for dyeing, add a little 502 glue and continue to fumigate).
[0053] 3. Use absorbent cotton to absorb a lit...
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