CN104894536A - Wood electroless nickel plating activation method - Google Patents
Wood electroless nickel plating activation method Download PDFInfo
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- CN104894536A CN104894536A CN201510354279.8A CN201510354279A CN104894536A CN 104894536 A CN104894536 A CN 104894536A CN 201510354279 A CN201510354279 A CN 201510354279A CN 104894536 A CN104894536 A CN 104894536A
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Abstract
The invention relates to a wood electroless nickel plating activation method with an aim to mainly solve technical problems that an existing electroless nickel plating activation method is complex in activation solution ingredient, easy to generate environment pollution and unfit for large-scale production. The method includes 1), preparing treating fluid by the aid of amino silane, water and ethyl alcohol and then preparing a nickel sulfate solution; 2), soaking a birch veneer in the treating fluid, and then soaking in a six-water nickel sulfate solution prior to cleaning the same; 3), restoring in a restoring solution to complete the activation process. A board subjected to the activation treatment is provided with an electroless nickel layer, the metal deposition rate is maximally 0.7638g/g, and the surface resistivity is minimally 110.4315momega/cm<2>. The electromagnetic shielding property of a nickel plated birch is good, the wave frequency ranges from 9kHz to 1.5GHz, and the minimum shielding of the electroless nickel plated birch is 45dB.
Description
Technical field
The present invention relates to chemical nickel plating method.
Technical background
Electroless plating can plate complicated shape plating material owing to having, and coating is even, and having good mechanical property, is the important channel of non-metallic metal.Meanwhile, electroless plating can be given nonmetal with surface conductivity, capability of electromagnetic shielding etc.Timber is non-metallic material, its surface does not possess autocatalytic nature, so, chemical nickel plating is carried out the same with in the principle of other nonmetallic surface chemical nickel platings at wood surface, in advance timber need be activated, namely at surface adsorption one deck catalyzer, then immerse plating solution, by the reduction of metal ion, make wood surface adsorbing metal coating.The general colloidal palladium that adopts of wood chemistry plating activation activates, but PdCl wherein
2for the salt of noble metal, price is valuable, and has certain toxicity, and complex technical process.In order to the novel activated method of developing low-cost, environmental protection, saving precious metal, active nickel is adopted to replace palladium metal.As gold field to disclose the nickel chemical plating technology of timber in Agricultural University of the Inner Mongol's journal (natural science edition) 1 phase in 2007, comprise following technical process: board using poplar board → polishing → dedusting → washing → cold and hot water extract Transformatin → washing → drying → surface treatment → drying → activation treatment → washing → chemical nickel plating → drying → performance measurement.Nickel activation method comprises following two kinds:
(1) desirable normal temperature nickel activation solution component parameter and soak time parameter are: concentration of nickel sulfate 15gL
-1, sodium borohydride 15gL
-1, sodium hydroxide 10gL
-1, hydrochloric acid 10gL
-1, the time that the time activated in A liquid activates in 9min, B liquid is 90s.
(2) desirable high temperature nickel activation solution component parameter and soak time parameter are: nickelous acetate concentration 70gL
-1, sodium hypophosphite concentration 70gL
-1, dipping temperature 40 DEG C, dipping time 5min, soak time 30min, activation temperature 170 DEG C.
These palladium-free activation process, activation solution complicated component, and the volatility of methyl alcohol, hydrochloric acid etc., can have certain pollution to environment, operability is not high, is not suitable for scale operation.
Summary of the invention
The present invention is the activation solution complicated component of the activation method that will solve existing lumber chemical nickel plating and easily environment is produced to the technical problem polluting, be not suitable for scale operation, and provides a kind of activation method of lumber chemical nickel plating.
The activation method of a kind of lumber chemical nickel plating of the present invention, carries out according to the following steps:
One, by the concentration of volume percent of aminosilane be 1.5 ~ 8%, the concentration of volume percent of water is 2 ~ 8% join in ethanol by aminosilane and water, mix, ageing 2 ~ 5h, obtains treatment solution; Compound concentration is the nickel sulfate hexahydrate solution of 2 ~ 10g/L again;
Two, birch veneer is immersed in the treatment solution that step one obtains and soaks 10min ~ 20min, then soak 5min ~ 20min in nickel sulfate hexahydrate solution, then clean with distilled water flushing; Remove remaining nickel ion;
Three, the birch veneer through step 2 process is immersed in reduction 10 ~ 20min in reduced liquid, completes reactivation process; Wherein reduced liquid is that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2 ~ 5g/L to 2 ~ 4g/L by the concentration of sodium borohydride.
First the present invention prepares the aminosilane ethanolic soln of certain water content, after ageing, aminosilane hydrolysis wherein, produce silanol so that inorganics combines, birch veneer is immersed in treatment solution successively makes birch veneer surface form the uniform silane film of one deck, process in nickel sulfate hexahydrate solution again, with nickel ion Ni
2+generation coordination combines, and forms chemical adsorption, and activation completely, and strengthens the adsorptive power of nickel, again with reduced liquid reduction after washing, completes reactivation process.Reactivation process of the present invention is simple, asepsis environment-protecting.
Utilize the result of the birch veneer chemical nickel plating of activation method process of the present invention good, wood surface is covered by metal plating completely, coating uniformly continous, and because of the bridging action of self-assembled film, rete is more firm, and remains the original texture of wood surface, coating is Ni-P binary alloy, main component is Ni, and P content is wherein lower than 2wt.%, and coating is crystalline structure.Metal deposition rate is 0.7638g/g to the maximum, and surface resistivity is minimum is 110.4315m Ω/cm
2.The electromagnet shield effect of nickel plating birch is good, and be within the scope of 9kHz--1.5GHz at wave frequency, chemical nickel plating birch is minimum is shielding for 45dB.
Accompanying drawing explanation
In Fig. 1 embodiment 1, birch veneer soaks the stereoscan photograph of latter 500 times in treatment solution;
In Fig. 2 embodiment 1, birch veneer soaks the stereoscan photograph of latter 5000 times in treatment solution;
Birch veneer stereoscan photograph of 500 times after nickel sulfate hexahydrate solution soaking in Fig. 3 embodiment 1;
Birch veneer stereoscan photograph of 5000 times after nickel sulfate hexahydrate solution soaking in Fig. 4 embodiment 1;
Birch veneer stereoscan photograph of 500 times after step 3 process in Fig. 5 embodiment 1;
Birch veneer stereoscan photograph of 5000 times after step 3 process in Fig. 6 embodiment 1;
The stereoscan photograph of 500 times after birch veneer chemical nickel plating in Fig. 7 embodiment 1;
The stereoscan photograph of 5000 times after birch veneer chemical nickel plating in Fig. 8 embodiment 1;
Electroless plating rate graph of a relation over time in Fig. 9 embodiment 1;
Resistivity graph of a relation over time in Figure 10 embodiment 1;
The X-ray diffractogram of the veneer of the chemical nickel plating of 40 minutes is deposited in Figure 11 embodiment 1;
The effectiveness of shielding figure of the plank that in Figure 12 embodiment 1, electroless plating obtains.
Embodiment
Embodiment one: the activation method of a kind of lumber chemical nickel plating of present embodiment, carry out according to the following steps:
One, by the concentration of volume percent of aminosilane be 1.5 ~ 8%, the concentration of volume percent of water is 2 ~ 8% join in ethanol by aminosilane and water, mix, ageing 2 ~ 5h, obtains treatment solution; Compound concentration is the nickel sulfate hexahydrate solution of 2 ~ 10g/L again;
Two, birch veneer is immersed in the treatment solution that step one obtains and soaks 10min ~ 20min, and then soak 5min ~ 20min in nickel sulfate hexahydrate solution, then clean with distilled water flushing; Remove remaining nickel ion;
Three, the birch veneer through step 2 process is immersed in reduction 10 ~ 20min in reduced liquid; Wherein reduced liquid is that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2g/L to 2 ~ 4g/L by the concentration of sodium borohydride.
Embodiment two: present embodiment and embodiment one are N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (KH792) or γ-aminopropyl triethoxysilane (KH550) unlike the aminosilane in step one.Other are identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike the concentration of volume percent of aminosilane in step one be 3%, the concentration of volume percent of water is 5%.Other is identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three are 5g/L unlike the concentration of nickel sulfate hexahydrate solution in step one.Other is identical with one of embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four are 15min unlike the soak time in step 2 in treatment solution, in nickel sulfate hexahydrate solution, soak time is 10min.Other is identical with one of embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five unlike in step 3 in reduced liquid the recovery time be 15min.Other is identical with one of embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six are be that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2g/L to 3g/L by the concentration of sodium borohydride unlike the reduced liquid in step 3.Other is identical with one of embodiment one to six.
Beneficial effect of the present invention is verified by following embodiment:
Embodiment 1:
The activation method of the lumber chemical nickel plating of the present embodiment, carries out according to the following steps:
One, by the concentration of volume percent of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (KH792) be 1.5%, the concentration of volume percent of water is 6% join in ethanol by N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (KH792) and water, mix, ageing 3h, obtains treatment solution; Compound concentration is the nickel sulfate hexahydrate solution of 10g/L again;
Two, birch veneer is immersed in the treatment solution that step one obtains and soaks 10min, and then soak 10min in nickel sulfate hexahydrate solution, then clean with distilled water flushing; Remove remaining nickel ion;
Three, the birch veneer through step 2 process is immersed in reduced liquid reduces 10min; Wherein reduced liquid is that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2g/L to 4g/L by the concentration of sodium borohydride, completes reactivation process.
The birch veneer of the present embodiment be immersed in the treatment solution that step one obtains soak after 10min 500 times stereoscan photograph as shown in Figure 1, the stereoscan photograph of 5000 times as shown in Figure 2, as can be seen from Fig. 1 and Fig. 2, there is the silane film that one deck is very thin on the surface of timber.Illustrate and successfully allowing by this step of KH792 process silane and wood surface combine.
In the present embodiment step 2, the stereoscan photograph of 500 times after birch veneer soaks in nickel sulfate hexahydrate solution as shown in Figure 3, the stereoscan photograph of 5000 times as shown in Figure 4, birch veneer after step 3 process 500 times stereoscan photograph as shown in Figure 5, the stereoscan photograph of 5000 times as shown in Figure 6, because the volume of metal ion and simple substance is little especially, even so scanning electron microscope is also difficult to the nickel ion seeing wood surface, but the silane film of wood surface significantly can be observed.
By the concentration of single nickel salt be 30g/L, the concentration of inferior sodium phosphate is 30g/L, the concentration of sodium-acetate is 15g/L, the concentration of lactic acid is 20mL/L, the concentration of ammonium chloride is 10g/L, the 0.002g/L of the concentration of thiocarbamide, single nickel salt, inferior sodium phosphate, sodium-acetate, lactic acid, ammonium chloride and thiocarbamide are added water, after dissolving, adjusted to ph is 8.5, obtains chemical plating solution; Being placed in chemical plating solution by the birch veneer through the present embodiment activation treatment, is be coated with 10,15,20,25,30,40 minutes under the condition of 70 DEG C in temperature, and it is dry in the baking oven of 103+2 DEG C for being then placed on temperature, namely obtains the veneer of chemical nickel plating.As shown in Figure 7, as shown in Figure 8, wood surface is covered by nickel metal the stereoscan photograph of 5000 times the stereoscan photograph of 500 times of the veneer of chemical nickel plating completely, and has certain thickness, and coating uniformly continous, there is obvious metalluster.
Be coated with in process, relation is as shown in Figure 9 over time for deposition, relation is as shown in Figure 10 over time for resistivity, as can be seen from Fig. 9 and Figure 10, along with the increase of time, the deposition of veneer constantly increases, resistivity constantly reduces, when electroless plating time is 40min, surface desorption rate reaches 0.7638g/g, and surface resistivity reaches 110.4315m Ω/cm
2, and the trend of change is tending towards slow along with the increase of time, and reason is that the constituent concentration in chemical plating fluid constantly reduces, and increases the difficulty producing elemental nickel.So 40min is the Best Times of electroless plating time.
By the X-ray diffractogram of the veneer of the deposition chemical nickel plating of 40 minutes as shown in figure 11, by learning the analysis of figure, in 2 θ=45 °, 52 °, three diffraction peaks at 78 ° of places, belong to crystal Ni (111), Ni (200), Ni (220) respectively, illustrate that coating is crystal nickel.Also have a diffraction peak when 2 θ=22 °, that is the cellulosic diffraction peak of timber itself, and compared with the diffraction peak of nickel, peak value is much little, and this shows that metallic nickel has covered the surface of timber completely.
For common timber, its electromagnet shield effect is almost nil, and namely common timber does not possess the usefulness of electromagnetic shielding.The effectiveness of shielding of electromagnetic shielding material generally will meet and is not less than 30 to 40dB, Figure 12 is the effectiveness of shielding figure of the plank that the present embodiment electroless plating obtains, from 12 figure, be the frequency range of 9kHz to 1.5GHz at electromagnetic frequency, after plating, the effectiveness of shielding of timber is between 40dB to 70dB, meet the requirement of electromagnetic shielding material, the field with electromagnetic shielding can be applied.
The reactivation process of the present embodiment chemical plating is controlled, and speed of response is fast, and the stability of plating solution is high, and coating is combined solid and reliable because of the bridging action of self-assembled film with wood surface.Present method replaces palladium activation, has saved noble metal, and process controllability is strong, can be used for large-scale industrial production, has good actual application prospect.
Claims (7)
1. an activation method for lumber chemical nickel plating, is characterized in that the method is carried out according to the following steps:
One, by the concentration of volume percent of aminosilane be 1.5 ~ 8%, the concentration of volume percent of water is 2 ~ 8% join in ethanol by aminosilane and water, mix, ageing 2 ~ 5h, obtains treatment solution; Compound concentration is the nickel sulfate hexahydrate solution of 2 ~ 10g/L again;
Two, birch veneer is immersed in the treatment solution that step one obtains and soaks 10min ~ 20min, then soak 5min ~ 20min in nickel sulfate hexahydrate solution, then clean with distilled water flushing; Remove remaining nickel ion;
Three, the birch veneer through step 2 process is immersed in reduction 10 ~ 20min in reduced liquid, completes reactivation process; Wherein reduced liquid is that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2 ~ 5g/L to 2 ~ 4g/L by the concentration of sodium borohydride.
2. the activation method of a kind of lumber chemical nickel plating according to claim 1, is characterized in that the aminosilane in step one is N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane or γ-aminopropyl triethoxysilane.
3. the activation method of a kind of lumber chemical nickel plating according to claim 1 and 2, is characterized in that the concentration of volume percent of aminosilane in step one treatment solution is 3%, the concentration of volume percent of water is 5%.
4. the activation method of a kind of lumber chemical nickel plating according to claim 1 and 2, is characterized in that the concentration of nickel sulfate hexahydrate solution in step one is 5g/L.
5. the activation method of a kind of lumber chemical nickel plating according to claim 1 and 2, it is characterized in that the soak time in step 2 in treatment solution is 15min, in nickel sulfate hexahydrate solution, soak time is 10min.
6. the activation method of a kind of lumber chemical nickel plating according to claim 1 and 2, to is characterized in that in step 3 that the recovery time is 15min in reduced liquid.
7. the activation method of a kind of lumber chemical nickel plating according to claim 1 and 2, the reduced liquid that it is characterized in that in step 3 is that sodium borohydride is joined concentration is obtain in the sodium hydroxide solution of 2.5g/L to 3g/L by the concentration of sodium borohydride.
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| CN201510354279.8A CN104894536A (en) | 2015-06-24 | 2015-06-24 | Wood electroless nickel plating activation method |
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| CN201510354279.8A CN104894536A (en) | 2015-06-24 | 2015-06-24 | Wood electroless nickel plating activation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251823A (en) * | 2018-01-15 | 2018-07-06 | 杭州和韵科技有限公司 | A kind of plastic electroplating preprocess method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148757A (en) * | 2007-10-15 | 2008-03-26 | 北京林业大学 | Composition of surface chemistry plating liquid and preparation method for wooden electromagnetic screen material |
| CN101270474A (en) * | 2007-03-21 | 2008-09-24 | 内蒙古农业大学 | Activation technique for lumber chemical nickel plating |
| CN102560447A (en) * | 2011-12-14 | 2012-07-11 | 内蒙古农业大学 | Activation technology of wood chemical copper plating |
-
2015
- 2015-06-24 CN CN201510354279.8A patent/CN104894536A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270474A (en) * | 2007-03-21 | 2008-09-24 | 内蒙古农业大学 | Activation technique for lumber chemical nickel plating |
| CN101148757A (en) * | 2007-10-15 | 2008-03-26 | 北京林业大学 | Composition of surface chemistry plating liquid and preparation method for wooden electromagnetic screen material |
| CN102560447A (en) * | 2011-12-14 | 2012-07-11 | 内蒙古农业大学 | Activation technology of wood chemical copper plating |
Non-Patent Citations (1)
| Title |
|---|
| 高岗强: ""木材化学镀镍的活化工艺研究"", 《中国优秀硕士学位论文全文数据库 工程科技I辑（月刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251823A (en) * | 2018-01-15 | 2018-07-06 | 杭州和韵科技有限公司 | A kind of plastic electroplating preprocess method |
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