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Device and method for synthesizing silver-copper alloy nanofluid

A nanofluid, silver-copper alloy technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high risk factor of reducing agent, difficulty in large-scale production, difficulty in dispersing particles, etc. , to achieve the effect of solving the shortcomings of easy oxidation, excellent optics, and uniform particle distribution

Active Publication Date: 2021-12-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the single-step method is that the nanoparticles are uniformly dispersed and the heat transfer performance is better, but the preparation process is complicated, the cost is high, and it is not easy to mass-produce, and the traditional single-step method preparation device basically requires a high temperature and high pressure environment, and the risk of reducing agents High coefficient, not friendly to the environment
The two-step preparation of nanofluids has the advantages of simple process, low cost, and easy mass production, but there are also disadvantages such as the particles are not easy to disperse, which leads to a decrease in heat transfer performance.

Method used

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  • Device and method for synthesizing silver-copper alloy nanofluid
  • Device and method for synthesizing silver-copper alloy nanofluid
  • Device and method for synthesizing silver-copper alloy nanofluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Embodiment 1 (total concentration of copper and silver is 12mmol / L)

[0035] (1) weigh silver acetate and 0.075g copper sulfate, 0.333g polyvinylpyrrolidone (the quality of PVP is calculated by monomer molecular weight) with precision balance (according to Ag + and Cu 2+ The ratio of the concentration of the substance to PVP is 1:5), 0.528g and 0.1056g of ascorbic acid, pour the PVP powder into 50ml of deionized water and stir to make a PVP aqueous solution, and then put the copper acetate particles and copper sulfate particles in turn. into the PVP aqueous solution, stirred and ultrasonically oscillated for 20 minutes, respectively dissolved ascorbic acid in 50 ml of deionized water as a reducing agent solution, and stirred for 15 minutes.

[0036] (2) Take 20ml of precursor solution and reductant replenishment solution and load them on two micro-syringes respectively and fix them on the syringe pump with clips, place the beaker containing 20ml of reductant solution in...

Embodiment 2

[0038] Embodiment 2 (total concentration of copper and silver is 10mmol / L)

[0039] (1) weigh silver acetate and 0.0625g copper sulfate, 0.2775g polyvinylpyrrolidone (the quality of PVP is calculated by monomer molecular weight) with precision balance (according to Ag + and Cu 2+ The ratio of the concentration of the substance to PVP is 1:5), 0.44g and 0.088g ascorbic acid, pour the PVP powder into 50ml of deionized water and stir to make a PVP aqueous solution, and then put the copper acetate particles and copper sulfate particles in turn. into PVP aqueous solution, stirred and ultrasonically oscillated for 20 minutes, dissolved ascorbic acid in 50 ml of deionized water as reducing agent solution and reducing agent replenishing solution, and stirred for 15 minutes.

[0040] (2) As in step (2) of Example 1, the reaction system was assembled.

[0041] (3) The silver-copper alloy nanofluid was synthesized as in step (3) of Example 1.

Embodiment 3

[0042] Embodiment 3 (total concentration of copper and silver is 12mmol / L, and surfactant is SDBS)

[0043] (1) Use a precision balance to weigh silver acetate and 0.075g copper sulfate, 0.2091g SDBS (according to Ag + and Cu 2+ The ratio of the concentration of the substance to SDBS is 1:3), 0.528g and 0.1056g ascorbic acid, the SDBS powder is poured into 50ml of deionized water and stirred to make an SDBS aqueous solution, and then the copper acetate particles and the copper sulfate particles are placed in turn into SDBS aqueous solution, stirred and ultrasonically oscillated for 20 min, and ascorbic acid was dissolved in 50 ml of deionized water respectively as reducing agent solution and reducing agent replenishing solution, and stirred for 15 min.

[0044] (2) As in step (2) of Example 1, the reaction system was assembled.

[0045] (3) The silver-copper alloy nanofluid was synthesized as in step (3) of Example 1.

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Abstract

The invention discloses a device and a method for synthesizing a silver-copper alloy nanofluid, and belongs to the technical field of nanofluid preparation. The device and the method for synthesizing the silver-copper alloy nanofluid solves the problems that a traditional heat exchange working medium cannot meet the heat exchange requirement of extremely high heat, a nanofluid preparation method basically requires a high-temperature and high-pressure environment and a toxic reducing agent, and common metal nanoparticles are prone to oxidation. The preparation process is simple to operate, ascorbic acid is used as a reducing agent, and the method is safe to operate and environment-friendly; and in the aspect of particle selection, silver and copper metals with high heat conductivity coefficients are selected, so that the heat conductivity of the base solution can be improved to the maximum extent, the problem that the metals are easy to oxidize can be better solved by dispersing the silver and copper metals in the base solution in an alloy form, and the nano-fluid particles prepared by the preparation method are uniform in particle distribution, have the particle size of 60-90 nm and are good in heat-conducting property.

Description

technical field [0001] The invention relates to the preparation of nanofluids, in particular to a reaction system for preparing silver-copper alloy nanofluids. Background technique [0002] In the fields of aerospace, energy chemical industry, microelectronics technology, etc., the heat load of advanced electronic equipment and high-power devices continues to increase, and traditional heat dissipation working fluids such as water and heat transfer oil are increasingly unable to meet the heat dissipation requirements, and nanofluids As a new type of The heat exchange working fluid has higher thermal conductivity, so it has a wider application prospect. [0003] In 1995, Choi et al. of Argonne National Laboratory in the United States proposed nanofluid: a stable suspension formed by adding 1-100nm metal or non-metal particles to the base fluid. This is an innovative research in the field of nanotechnology applied to thermal engineering. The preparation method of nanofluid is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00H05K7/20B82Y30/00B82Y40/00
CPCB22F9/24H05K7/20218B82Y30/00B82Y40/00Y02A50/30
Inventor 夏国栋闫佳马丹丹
Owner BEIJING UNIV OF TECH
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