Method for preparing nanosilver powder in batches
A technology of nano-silver powder and mass production, which is applied in the direction of nano-technology, can solve the problems of nano-silver agglomeration, agglomeration, and uneven particle size of nano-silver, and achieve the effect of increased surface area, uniform distribution of crystal seeds, and controllable quantity
Active Publication Date: 2015-09-23
NANO TOP ELECTRONICS TECH
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The invention provides a method for preparing nanosilver powder in batches, belonging to the field of nano-material preparation. Nanosilver particles are synthetized in two steps, at first, a low-concentration reducing agent solution is slowly added into a solution mixed with silver salt, a protective agent, and a pH conditioning agent drop by drop, and then a high-concentration reducing agent solution is rapidly added drop by drop to obtain a nanosilver mixed solution; impurities in the nanosilver mixed solution are removed through a membrane separation device to obtain a nanosilver dispersion liquid; and at the end, absolute ethyl alcohol and a high-molecular dispersant are added into the nanosilver dispersion liquid, and spray drying is carried out by a spray drying device to obtain nanosilver powder in a certain particle size. The particle size of the prepared nanosilver powder is controllable, the batches are stable, the problems of non-uniform particle size during the synthesis of nanosilver, nanosilver separation, and agglomeration and acaking during powder preparation are solved, the preparation process and the operation are simple, and industrial and batches production is realized.
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Property | Measurement | Unit |
Aperture | 1.0 ~ 100.0 | nm |
Particle size | 1.0 ~ 500.0 | nm |
Membrane pore size | 30.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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