Preparation method for nano-copper with oxidation resistance and dispersibility
A technology of anti-oxidation and dispersibility, applied in the field of nanomaterials, to achieve the effect of good monodispersity, uniform particle size, easy transportation and storage
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[0023] Example 1
[0024] (1) Disperse 3.70 g of copper glycinate and 0.02 g of dispersant sodium dodecylbenzene sulfonate in 300 mL of distilled water, and obtain a mixed solution through magnetic stirring and ultrasonic dispersion;
[0025] (2) Heat the above-mentioned mixture in a water bath to 25°C under the action of magnetic stirring;
[0026] (3) Disperse 3.31 g of reducing agent sodium borohydride and 0.021 g of dispersing agent sodium dodecylbenzene sulfonate in 50 mL of distilled water, and stir to disperse;
[0027] (4) Add the mixture of step (3) dropwise to the mixture of step (2), add it in 30 seconds, and then continue to react at 25°C for 3 hours;
[0028] (5) Centrifuge the resulting suspension (rotational speed is 10,000 rpm), wash twice with absolute ethanol and distilled water each, and disperse the resulting solid product in 50 g of n-butanol and stand still for 1 hour. XRD as figure 1 Shown: The crystal phase of elemental copper is present, no other copper oxides ...
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[0030] Example 2
[0031] (1) Disperse 2.50 g of anhydrous cuprous acetate and 0.01 g of dispersant sodium dodecylbenzene sulfonate in 500 mL of distilled water, and obtain a mixed solution through magnetic stirring and ultrasonic dispersion;
[0032] (2) Heat the above-mentioned mixture in a water bath to 50°C under the action of magnetic stirring;
[0033] (3) Disperse 1.56 g of sodium borohydride and 0.015 g of dispersant sodium dodecylbenzene sulfonate in 200 mL of distilled water, stir to disperse to obtain a mixed solution;
[0034] (4) Add the mixture of step (3) dropwise to the mixture of step (2), add it in 90 seconds, and then continue to react at 50°C for 3 hours;
[0035] (5) Centrifuge the resulting suspension (rotational speed is 10,000 rpm), wash twice with absolute ethanol and distilled water each, and disperse the resulting solid product in 20 g of tributyl phosphate and stand still for 1 hour.
[0036] SEM detects the morphology and structure of copper nanoparticles, su...
Example Embodiment
[0038] Example 3
[0039] (1) Disperse 3.40 g of copper tartrate trihydrate and 0.10 g of dispersant sodium polyacrylate (molecular weight 3000) in 300 mL of distilled water, and obtain a mixed solution through magnetic stirring and ultrasonic dispersion;
[0040] (2) Heat the above-mentioned mixture in a water bath to 75°C under magnetic stirring;
[0041] (3) Disperse 1.50 g of hydrazine hydrate and 0.24 g of dispersant sodium polyacrylate (molecular weight 3000) in 100 mL of distilled water, stir to disperse;
[0042] (4) Add the mixture of step (3) dropwise to the mixture of step (2), add it in 50 seconds, and then continue to react at 75°C for 3 hours;
[0043] (5) Centrifuge the obtained suspension (rotational speed is 10,000 rpm), wash twice with absolute ethanol and distilled water each, and disperse the obtained solid product in 50 g oleic acid, and stand still for 1 hour. The morphology and structure of the nano copper particles obtained by SEM inspection, such as Figure 2B ...
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