Formular and process of polymer powder chemical Co-plating

A technology of polymer powder and electroless plating, which is applied in the direction of liquid chemical plating, metal material coating technology, coating, etc., can solve the problems of high density, influence on popularization and application, and weight gain of equipment, and achieve good particle dispersion and easy Manipulation and control, non-perishable effect

Inactive Publication Date: 2006-03-29
GUILIN UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

That is, the solid phase particles of the magnetorheological fluid are usually multi-domain soft magnetic materials with diameters of microns such as iron, cobalt, and nickel, and their density is often higher than that of the continuous phase. The magnetic particles settle due to gravity and cause stratification, which affects Its popularization and application; while the traditional absorber is used for the wave-absorbing material, because of its high density, it will add weight to the device
Lightweight magnetic materials are expected to solve this problem. The preparation and formulation of magnetic polymer powders that can be applied to magnetorheological fluids and wave-absorbing coatings using electroless plating technology have not been reported.

Method used

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  • Formular and process of polymer powder chemical Co-plating

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Embodiment

[0024] First, the polymer powder is pretreated by degreasing, coarsening, sensitization, activation, etc., and then electroless cobalt plating is performed.

[0025] 1. Coarsening solution formula and process conditions:

[0026] Potassium dichromate 30 g / L

[0027] Sulfuric acid 477ml / L

[0028] Phosphoric Acid (85%) 50ml / L

[0029] Time (t) 50 minutes

[0030] Temperature (T) 65℃

[0031] 2. Formula and process conditions of sensitizing solution:

[0032] Stannous chloride 40 g / L

[0033] Hydrochloric acid 100ml / L

[0034] temperature room temperature

[0035] 3. Activation solution formula and process conditions:

[0036] Palladium Chloride 0.2 g / L

[0037] Stannous Chloride 15 g / L

[0038] Hydrochloric acid 200ml / L

[0039] temperature room temperature

[0040] 4. Formula of electroless cobalt plating solution:

[0041] Cobalt sulfate 30 g / l,

[0042] Sodium hypophosphite 30 g / l,

[0043] Sodium Potassium Tartrate 25 g / L

[0044] Boric acid 15 g / l.

[0045...

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Abstract

A chemical co-plating liquid for the polymer powder used for magnetic rheologic liquid or wave absorbing film is prepared from cobalt sulfate, potassium sodium tartrate, boric acid, ammonium sulfate, sodium citrate, and sodium hypophosphite. Its plating process is performed at 60-80 deg.C for 1-2 hr.

Description

technical field [0001] The invention relates to the preparation of a lightweight magnetic material that can be used in special fields such as magnetorheological fluids and wave-absorbing coatings—polymer powder electroless cobalt plating formula and process. Background technique [0002] Magnetorheological fluid is an intelligent material that can control the dynamic performance of devices by controlling the strength of the external magnetic field and changing the physical properties of the material such as the viscosity coefficient. Absorbing materials refer to a class of functional materials that can effectively absorb incident radar waves and make them scatter and attenuate, and are widely used in stealth technology. In practical applications, magnetorheological fluids and absorbing materials have encountered difficulties caused by the high density of traditional magnetic materials. That is, the solid phase particles of the magnetorheological fluid are usually multi-doma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36C23C18/20
Inventor 刘峥
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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