Core-shell-shaped liquid metal nanoparticles and method for preparing same through power ultrasound
A liquid metal and nanoparticle technology, applied in metal processing equipment, nanotechnology, nanotechnology, etc., can solve the problems of irreversible photothermal performance, reduced photothermal efficiency, deformation and agglomeration, and achieve photothermal conversion rate and photothermal stability. The effect of improved performance, excellent photothermal performance, and simple operation
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[0041] A method for preparing core-shell liquid metal nanoparticles with enhanced photothermal cycle stability, characterized in that it at least includes the following steps:
[0042] (1) Put the liquid metal in dopamine hydrochloride solution (1 mg / mL), sonicate for 30 minutes with a water-bath ultrasonic machine under ice-water bath conditions, and centrifuge to obtain LMNPs@PDA① nanoparticles;
[0043] (2) Disperse the LMNPs@PDA① nanoparticles in the step (1) into the monomer solution containing inert gas nanobubbles to form a reaction dispersion liquid, insert the ultrasonic horn into the reaction liquid and seal the reaction system, and pour into the reaction dispersion liquid Inject an inert gas to deoxygenate, and conduct intermittent ultrasonic cycles on the reaction liquid by means of ultrasonication for 2min-stop ultrasonication for 1min (the reaction dispersion liquid is always ventilated). Liquid metal hybrid nanoparticles with excellent photothermal stability wer...
Embodiment 1
[0070] Add 300mg gallium indium tin alloy (Ga66.5%, In20.5%, Sn13%, mp12 ℃) to 20mL glass bottle, then add 10mL deionized water and 10mg dopamine hydrochloride, put the glass bottle in a water bath type ultrasonic machine Ultrasonic for 30min, in which the ultrasonic frequency is 40kHz, the ultrasonic power is 150W, and the temperature of the ice-water bath is 10±5°C. The dispersion liquid is repeatedly washed and centrifuged with deionized water three times to obtain LMNPs@PDA① nanoparticles, and the LMNPs@PDA① nanoparticles are configured Pour the component dispersion into a double-layer jacketed glass reactor and add deionized water to 40mL, then add 20mL of absolute ethanol and 900mg of NIPAM monomer to it, stir until the monomer is completely dissolved, and then use a micro-nano bubble generator to blow nitrogen. Insert the ultrasonic horn through the rubber cover into the double-jacketed glass reactor, then insert the rubber tube connected with the aeration stone into th...
Embodiment 2
[0072]Add 200mg of gallium-indium alloy (Ga75.5%, In24.5%, mp15.7°C) to a 20mL glass bottle, then add 10mL of deionized water and 15mg of dopamine hydrochloride, place the glass bottle in a water-bath ultrasonic machine for 30min , where the ultrasonic frequency is 40kHz, the ultrasonic power is 150W, and the temperature of the ice-water bath is 10±5°C. The dispersion is washed and centrifuged three times with deionized water repeatedly to obtain LMNPs@PDA① nanoparticles, and the LMNPs@PDA① nanoparticles are configured into a dispersed Pour the liquid into a double-layer jacketed glass reactor and add deionized water to 30mL, then add 30mL of absolute ethanol and 2g of DEAEMA monomer to it, stir until the monomer is completely dissolved, and blow in argon gas with a micro-nano bubble generator . Insert the ultrasonic horn through the rubber cover into the double-jacketed glass reactor, then insert the rubber tube connected with the aeration stone into the glass reactor through...
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