A kind of silver wire coated with fe3o4 nanometer magnetic particles and its preparation and use
A nano-magnetic particle, fe3o4 technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high surface activity, poor dispersibility, easy to agglomerate, etc. simple effect
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Embodiment 1
[0036] 1) Put 200mL of ethylene glycol in a dry and clean 500mL Erlenmeyer flask, add 27mg of ferric chloride hexahydrate and 16.65g of polyvinylpyrrolidone, and stir magnetically until ferric chloride hexahydrate and polyvinylpyrrolidone are completely dissolved to obtain A solution;
[0037] Put 200mL of ethylene glycol in another dry and clean 500mL Erlenmeyer flask, add 17g of silver nitrate, and stir magnetically until the silver nitrate is completely dissolved to obtain solution B;
[0038] Mix solution A and solution B at a volume ratio of 1:1; transfer the mixed solution to a high-pressure reactor, and heat it at 140°C to 180°C for 2 to 4 hours to obtain a silver wire mixture; The silver thread mixed solution is first washed with acetone, then repeatedly washed with ethanol, and finally washed with deionized water to obtain a 0.025 g / g silver thread solution;
[0039] 2) Take 3.2g of the above silver thread solution and place it in a dry and clean 200mL beaker, add 8g...
Embodiment 2
[0043] The preparation process of the silver thread solution is the same as step 1) of Example 1.
[0044] Get the above-mentioned silver thread solution 4g and place it in a dry and clean 200mL beaker, add 10g of hydrogen peroxide, stir with a glass rod until the reaction is complete, wash with deionized water several times, and obtain the surface-treated silver thread solution;
[0045] The silver wire solution after the above surface treatment was subjected to cell ultrasound, placed in a dry and clean 100mL Erlenmeyer flask, added 69.6mg ferric chloride hexahydrate and 35.95mg ferrous sulfate heptahydrate, and added appropriate amount of deionized water to the Erlenmeyer flask 1 / 3~1 / 2 of the volume, heat the oil bath to 30~50°C, and mechanically stir for 20~40min; raise the temperature of the oil bath to 60~70°C, add 0.1724~0.2000mL of 6mol / L sodium hydroxide solution, Continue mechanical stirring for 50~80min; raise the temperature of the oil bath to 80~90°C, add 0.02~0.0...
Embodiment 3
[0049] The preparation process of the silver thread solution is the same as step 1) of Example 1.
[0050] Take 12g of the above silver thread solution and place it in a dry and clean 200mL beaker, add 30g of hydrogen peroxide, stir with a glass rod until the reaction is complete, and wash with deionized water several times.
[0051] The above silver thread solution was subjected to cell ultrasound, placed in a dry and clean 100mL Erlenmeyer flask, added 69.6mg ferric chloride hexahydrate, 35.95mg ferrous sulfate heptahydrate, and an appropriate amount of deionized water to 1 / 3 of the Erlenmeyer flask ~1 / 2 volume, heat the oil bath to 30~50°C, and stir mechanically for 20~40min; raise the temperature of the oil bath to 60~70°C, add 0.1724~0.2000mL of 6mol / L sodium hydroxide solution, and continue stirring mechanically 50~80min; raise the temperature of the oil bath to 80~90°C, add 0.03~0.05g of SDS, remove the oil bath for heating, and stir it mechanically to room temperature....
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