Method for producing composite material
US-2024052186-A1 · Feb 15, 2024 · US
Nano-silver dispersion and preparation method thereof
US2022010094A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022010094-A1 |
| Application number | US-202117369129-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 7, 2021 |
| Priority date | Jul 9, 2020 |
| Publication date | Jan 13, 2022 |
| Grant date | — |
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Abstract
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A nano-silver dispersion and a preparation method thereof is disclosed. The method, includes: mixing γ-aminopropyltriethoxysilane, polyvinylpyrrolidone, sodium lauryl sulfate, silver nitrate and water, and conducting a chelation, to obtain a chelating dispersion, wherein before the mixing, the γ-aminopropyltriethoxysilane is exposed to the air for less than 5 min; and dropwise adding a sodium borohydride solution into the chelating dispersion, to obtain a mixture, and subjecting the mixture to an oxidation-reduction reaction, to obtain the nano-silver dispersion.
First claim
Opening claim text (preview).
We claim: 1 . A method for preparing a nano-silver dispersion, comprising: mixing γ-aminopropyltriethoxysilane, polyvinylpyrrolidone, sodium lauryl sulfate, silver nitrate and water, and conducting a chelation, to obtain a chelating dispersion, wherein before the mixing, the γ-aminopropyltriethoxysilane is exposed to the air for less than 5 min; and, dropwise adding a sodium borohydride solution into the chelating dispersion, to obtain a mixture, and subjecting the mixture to an oxidation-reduction reaction, to obtain the nano-silver dispersion. 2 . The method of claim 1 , wherein the mixing is performed as follows: mixing γ-aminopropyltriethoxysilane, silver nitrate and water, and conducting a chelation, and adding polyvinylpyrrolidone and sodium lauryl sulfate thereto. 3 . The method of claim 1 , wherein the dropwise adding is performed by continuously dropwise adding or interval dropwise adding. 4 . The method of claim 3 , wherein the interval dropwise adding is performed at a time interval of 3-8 seconds. 5 . The method of claim 1 , wherein a mass ratio of γ-aminopropyltriethoxysilane to silver nitrate is in the range of (2.2-2.8):1. 6 . The method of claim 1 , wherein a mass ratio of polyvinylpyrrolidone to silver nitrate is in the range of (2.5-3.5):1. 7 . The method of claim 1 , wherein a mass ratio of sodium lauryl sulfate to silver nitrate is in the range of (2.5-3.5):1. 8 . The method of claim 1 , wherein a mass ratio of sodium borohydride in the sodium borohydride solution to silver nitrate is in the range of (0.05-0.08):1. 9 . The method of claim 8 , wherein a mass fraction of the sodium borohydride solution is in the range of 0.05-0.07%. 10 . A nano-silver dispersion prepared by the method of claim 1 , comprising a nano-silver, and the nano-silver has a particle size of not more than 25 nm. 11 . The method of claim 2 , wherein a mass ratio of γ-aminopropyltriethoxysilane to silver nitrate is in the range of (2.2-2.8):1. 12 . The method of claim 3 , wherein a mass ratio of γ-aminopropyltriethoxysilane to silver nitrate is in the range of (2.2-2.8):1. 13 . The method of claim 4 , wherein a mass ratio of γ-aminopropyltriethoxysilane to silver nitrate is in the range of (2.2-2.8):1. 14 . The method of claim 2 , wherein a mass ratio of polyvinylpyrrolidone to silver nitrate is in the range of (2.5-3.5):1. 15 . The method of claim 3 , wherein a mass ratio of polyvinylpyrrolidone to silver nitrate is in the range of (2.5-3.5):1. 16 . The method of claim 4 , wherein a mass ratio of polyvinylpyrrolidone to silver nitrate is in the range of (2.5-3.5):1. 17 . The method of claim 2 , wherein a mass ratio of sodium lauryl sulfate to silver nitrate is in the range of (2.5-3.5):1. 18 . The method of claim 3 , wherein a mass ratio of sodium lauryl sulfate to silver nitrate is in the range of (2.5-3.5):1. 19 . The method of claim 4 , wherein a mass ratio of sodium lauryl sulfate to silver nitrate is in the range of (2.5-3.5):1. 20 . The method of claim 2 , wherein a mass ratio of sodium borohydride in the sodium borohydride solution to silver nitrate is in the range of (0.05-0.08):1.
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Classifications
Dispersions or suspensions of nanosized particles · CPC title
Spherical particles · CPC title
Nanosized particles · CPC title
Manufacture or treatment of nanostructures · CPC title
Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title
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- What does patent US2022010094A1 cover?
- A nano-silver dispersion and a preparation method thereof is disclosed. The method, includes: mixing γ-aminopropyltriethoxysilane, polyvinylpyrrolidone, sodium lauryl sulfate, silver nitrate and water, and conducting a chelation, to obtain a chelating dispersion, wherein before the mixing, the γ-aminopropyltriethoxysilane is exposed to the air for less than 5 min; and dropwise adding a sodium b…
- Who is the assignee on this patent?
- Univ Qingdao Technology
- What technology area does this patent fall under?
- Primary CPC classification B22F9/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jan 13 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).