A kind of transparent electromagnetic shielding film and preparation method thereof
An electromagnetic shielding and film technology, applied in the field of transparent electromagnetic shielding film and its preparation, can solve the problems of reduced electromagnetic wave reflection ability, weak interaction force, poor film connectivity, etc., and achieve the effect of increasing shielding ability and increasing absorption
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[0044] The substrate 1 is glass, polyethylene terephthalate (PET) film, polyimide PI film, polyvinyl alcohol PVA film, polystyrene (PS) film or polydimethylsiloxane (PDMS) film. ) any of the films. A preparation method of a transparent electromagnetic shielding film of the present invention comprises the following steps:
[0045] S1. Use acetone, ethanol and deionized water to clean the substrate;
[0046] S2, coating the silver nanowire dispersion liquid with a concentration of 0.5-10 mg / ml on the surface of the substrate;
[0047] S3, annealing the substrate prepared in step S2 in a temperature range of 50-100° C. for 0.2-1 hour to make a semi-finished product;
[0048] S4, coating the surface of the semi-finished product prepared in step S3 with a dispersion liquid composed of ferric oxide nanoparticles and polyvinylpyrrolidone;
[0049] S5, annealing the semi-finished product prepared in step S4 in a temperature range of 50-100° C. for 0.2-1 hour to obtain a transparent...
Example Embodiment
[0052] Example 1
[0053] A kind of transparent conductive film prepared by spin coating method
[0054] Preparation of ferric oxide metal oxide nanoparticles and polyvinylpyrrolidone dispersion:
[0055] First, 100 mg of Fe 3 O 4 Nanoparticles were added to 20 ml of ethanol, 300 mg of polyvinylpyrrolidone was added after sonication at room temperature for 15 min, and the mixture was then sonicated at 600 kw for 1 h to obtain stable Fe 3 O 4 Metal oxide nanoparticles and polyvinylpyrrolidone suspension.
[0056] Substrate preparation:
[0057] The glass substrate was sonicated for 5 minutes in an acetone-ethanol blend solution with a volume ratio of 1:1, then sonicated in deionized water for 10 minutes, then taken out and blown dry with nitrogen, and then treated in an ultraviolet ozone device for 10 minutes for use.
[0058] Preparation of transparent conductive films:
[0059] Silver nanowires dispersed in IPA at a concentration of 3.5 mg / ml were dropped onto the subs...
Example Embodiment
[0064] Embodiment 2 A kind of transparent electromagnetic shielding film prepared by ultrasonic spraying method
[0065] Preparation of ferric oxide metal oxide nanoparticles and polyvinylpyrrolidone dispersion: first add 50 mg of Fe3O4 nanoparticles into 20 ml of ethanol, add 200 mg of polyvinylpyrrolidone after sonication at room temperature for 15 minutes, and then put the mixture at 600kw power Sonication was carried out for 1 hour under sonication, and then a stable suspension of ferric tetroxide metal oxide nanoparticles and polyvinylpyrrolidone was obtained.
[0066] Substrate preparation: Polyimide (PI) thin film substrates were sonicated in a 1:1 volume ratio of acetone-ethanol blend solution for 5 min, then sonicated in deionized water for 10 min, then taken out and blown dry with nitrogen, then Treat in ultraviolet ozone equipment for 10 minutes for standby;
[0067] Preparation of transparent conductive film: adding silver nanowires dispersed in IPA with a concent...
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