CN100347337C - Formular and process of polymer powder chemical Co-plating - Google Patents
Formular and process of polymer powder chemical Co-plating Download PDFInfo
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- CN100347337C CN100347337C CNB2004100793014A CN200410079301A CN100347337C CN 100347337 C CN100347337 C CN 100347337C CN B2004100793014 A CNB2004100793014 A CN B2004100793014A CN 200410079301 A CN200410079301 A CN 200410079301A CN 100347337 C CN100347337 C CN 100347337C
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Abstract
The present invention discloses preparation of lightweight magnetic material used for specific fields of magnetic hypophosphite liquid, wave absorbing coating layer, etc., namely a formula and a technology of polymer powder for chemical cobalt plating. The formula mainly comprises cobalt sulfate, potassium sodium tartrate tetrahydrate, boracic acid, ammonium sulfate, trisodium citrate dihydrate and sodium hypophosphite; the chemical cobalt plating technology mainly comprises: the pH value is from 9 to 11, the temperature is from 60 to 80 DEG C, and the time is from 1 to 2h. the technical parameters of the prepared magnetic polymer powder are satisfactory, and the technological conditions and the formula of the present invention can be widely used for nonmetallic powder in the chemical cobalt plating technology.
Description
Technical field
The present invention relates to a kind of preparation----polymer powder electroless cobalt plating liquid formula and technology that can be used for the lightweight magneticsubstance in the special dimensions such as magnetic flow liquid, microwave absorbing coating.
Background technology
Magnetic flow liquid is by control foreign field intensity, changes the physical propertys such as viscosity factor of material, thereby reaches the intelligent material of control device dynamic performance.Absorbing material is meant a class functional materials that can absorb the incident radar wave effectively and make its scatter attenuation, is widely used in the stealthy technique.In actual applications, magnetic flow liquid and absorbing material have run into the big difficult problem that causes of traditional magnetic material density.Be magnetic flow liquid solid phase particles normally iron, cobalt, the isometrical degree of nickel be the multidomain soft magnetic materials of micron dimension, its density is often big than external phase, magnetic-particle has influenced it and has applied because of the action of gravity sedimentation causes layering; And the traditional absorption agent of absorbing material utilization because of its density is big, and increases weight to apparatus.The lightweight magneticsubstance is expected to solve this difficult problem, and the magnetic polymer powder craft and the prescription that utilize the electroless plating technology preparation can apply to magnetic flow liquid, microwave absorbing coating do not appear in the newspapers.
Summary of the invention
Purpose of the present invention provides a kind of and prepares the lightweight magneticsubstance at the last electroless cobalt plating of polymer powder (as polystyrene, polyethylene, polyvinyl chloride etc.)--the prescription and the technology of magnetic polymer powder.
Electroless cobalt plating on the polymer powder, at first with polymer powder after oil removing, alligatoring, sensitization and pre-activated are handled, carry out electroless cobalt plating.
Polymer powder electroless cobalt plating liquid formula is as follows:
Rose vitriol 20-40 grams per liter
Inferior sodium phosphate 20-30 grams per liter
Seignette salt 25 grams per liters
Boric acid 10-20 grams per liter
Ammonium sulfate 10-20 grams per liter
Trisodium Citrate 5-15 grams per liter
Thiocarbamide 1-3 mg/litre
The processing step of electroless cobalt plating is:
(1) presses the electroless cobalt plating liquid formula, respectively with rose vitriol, Seignette salt, boric acid, ammonium sulfate, Trisodium Citrate, inferior sodium phosphate dissolving;
(2) cobalt sulfate solution is poured in the potassium sodium tartrate solution, again the solution that stirs is poured in the boric acid solution, add ammoniumsulphate soln after mixing again, add sodium citrate solution at last;
(3) add reductive agent inferior sodium phosphate and stablizer thiocarbamide before using, be diluted to volume required, and with NaOH solution adjusting pH value to 9-11;
(4) will put into the above-mentioned plating bath for preparing through the pretreated polymer powder of oil removing, alligatoring, sensitization and activation and carry out electroless cobalt plating, plating temperature 60-80 ℃, plating time 1-2 hour.
Electroless cobalt plating prescription and technology on the polymer powder that the present invention relates to, simple, convenient, be easy to operate and control, bath stability, not perishable, the magnetic polymer powder technical parameter moderns that prepare are satisfied.Electroless cobalt plating coats the density of magnetic about 1.3, is the 7-8 gram per centimeter and be used for magnetic flow liquid traditional magnetic particulate density
3, little many, reached the purpose of experimental study.SEM figure before and after coating can obviously find out the densification of polymer powder coating layer, and particles dispersed is better.Through Electron Energy Disperse Spectroscopy test Coating composition, cobalt coats magnetic and contains Co83.07, P11.01, Si2.24.Confirm that through the x-ray diffractometer test magnetic coating is crystalline structure under plated state.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Wherein:
*Activation solution is reusable, but will often replenish new liquid.
*After this step was finished, the color of microsphere surface should become filbert from original white, and it is better that palladium is soaked on the surface.Otherwise answer the repetition of activation step.
* *Drying step can not adopt.
Embodiment
Embodiment
At first with polymer powder after oil removing, alligatoring, sensitization and pre-activated are handled, carry out electroless cobalt plating.
1, coarsening solution prescription and processing condition:
Potassium bichromate 30 grams per liters
477 milliliters/liter in sulfuric acid
(85%) 50 milliliter/liter of phosphoric acid
50 minutes time (t)
65 ℃ of temperature (T)
2, sensitizing solution prescription and processing condition:
Tin protochloride 40 grams per liters
100 milliliters/liter of hydrochloric acid
The temperature room temperature
3, activation solution prescription and processing condition:
Palladous chloride 0.2 grams per liter
Tin protochloride 15 grams per liters
200 milliliters/liter of hydrochloric acid
The temperature room temperature
4, electroless cobalt plating liquid formula:
Rose vitriol 30 grams per liters,
Inferior sodium phosphate 30 grams per liters,
Seignette salt 25 grams per liters
Boric acid 15 grams per liters.
Ammonium sulfate 15 grams per liters,
Trisodium Citrate 10 grams per liters
Thiocarbamide 2 mg/litre
5, electroless cobalt plating processing step:
(1) presses the electroless cobalt plating liquid formula, respectively with rose vitriol, Seignette salt, boric acid, ammonium sulfate, Trisodium Citrate, inferior sodium phosphate dissolving;
(2) cobalt sulfate solution is poured in the potassium sodium tartrate solution, again the solution that stirs is poured in the boric acid solution, add ammoniumsulphate soln after mixing again, add sodium citrate solution at last;
(3) add reductive agent inferior sodium phosphate and stablizer thiocarbamide before using, be diluted to volume required, and with NaOH solution adjusting pH value to 10;
(4) will put into the above-mentioned plating bath for preparing through the pretreated polymer powder of oil removing, alligatoring, sensitization and activation and carry out electroless cobalt plating, 70 ℃ of plating temperatures, plating time 1.5 hours.
Claims (2)
1. polymer powder electroless cobalt plating liquid, it is as follows to it is characterized in that filling a prescription: rose vitriol: the 20-40 grams per liter, inferior sodium phosphate: 20-30 grams per liter, Seignette salt: 25 grams per liters, boric acid: 10-20 grams per liter, ammonium sulfate: 10-20 grams per liter, Trisodium Citrate: 5-15 grams per liter, thiocarbamide: 1-3 mg/litre.
2. the coating method of a polymer powder electroless cobalt plating liquid as claimed in claim 1, comprise the polymer powder pre-treatment: oil removing, alligatoring, sensitization and activation is characterized in that processing step is as follows:
(1) respectively with rose vitriol, Seignette salt, boric acid, ammonium sulfate, Trisodium Citrate, inferior sodium phosphate dissolving;
(2) cobalt sulfate solution is poured in the potassium sodium tartrate solution, again the solution that stirs is poured in the boric acid solution, add ammoniumsulphate soln after mixing again, add sodium citrate solution at last;
(3) add reductive agent inferior sodium phosphate and stablizer thiocarbamide before using, be diluted to volume required, and with NaOH solution adjusting pH value to 9-11;
(4) will put into the above-mentioned plating bath for preparing through pretreated polymer powder and carry out electroless cobalt plating, plating temperature 60-80 ℃, plating time 1-2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100793014A CN100347337C (en) | 2004-09-24 | 2004-09-24 | Formular and process of polymer powder chemical Co-plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100793014A CN100347337C (en) | 2004-09-24 | 2004-09-24 | Formular and process of polymer powder chemical Co-plating |
Publications (2)
| Publication Number | Publication Date |
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| CN1752285A CN1752285A (en) | 2006-03-29 |
| CN100347337C true CN100347337C (en) | 2007-11-07 |
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| CNB2004100793014A Expired - Fee Related CN100347337C (en) | 2004-09-24 | 2004-09-24 | Formular and process of polymer powder chemical Co-plating |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831642A (en) * | 2010-04-13 | 2010-09-15 | 长沙力元新材料有限责任公司 | Application method of alkali electroless nickel/cobalt-plating solution |
| CN103086816B (en) * | 2013-01-28 | 2015-07-15 | 北京矿冶研究总院 | Method for coating metal on surface of agglomerated boron powder |
| CN106903306A (en) * | 2017-04-12 | 2017-06-30 | 合肥学院 | A kind of method that defect induced chemical depositing process prepares 3D printing metallic particles/polymer compound powder body |
| CN108404916B (en) * | 2018-05-04 | 2020-09-11 | 河南科技学院 | Preparation method of metal cobalt catalyst and application of metal cobalt catalyst in catalyzing butadiene hydrogenation reaction |
| CN112026272B (en) * | 2020-08-17 | 2023-03-21 | 浙江工业大学 | Novel wave-absorbing material with honeycomb structure and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198972A (en) * | 1998-04-21 | 1998-11-18 | 冶金工业部钢铁研究总院 | Method for surface chemical nickel plating of nickel-base alloy powder |
| JP2003034879A (en) * | 2001-07-26 | 2003-02-07 | Sony Chem Corp | Ni-PLATED PARTICLE AND MANUFACTURING METHOD THEREFOR |
| CN1419985A (en) * | 2001-11-21 | 2003-05-28 | 中国科学院金属研究所 | Method for mfg. Cu/Ti3SiC2 composite material by chemical copper plating |
-
2004
- 2004-09-24 CN CNB2004100793014A patent/CN100347337C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198972A (en) * | 1998-04-21 | 1998-11-18 | 冶金工业部钢铁研究总院 | Method for surface chemical nickel plating of nickel-base alloy powder |
| JP2003034879A (en) * | 2001-07-26 | 2003-02-07 | Sony Chem Corp | Ni-PLATED PARTICLE AND MANUFACTURING METHOD THEREFOR |
| CN1419985A (en) * | 2001-11-21 | 2003-05-28 | 中国科学院金属研究所 | Method for mfg. Cu/Ti3SiC2 composite material by chemical copper plating |
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| CN1752285A (en) | 2006-03-29 |
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