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A method for electroless nickel plating on carbon fiber surface
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A surface chemistry, carbon fiber technology, applied in liquid chemical plating, coating, metal material coating process, etc., can solve the problem that Fe powder cannot be removed cleanly
Active Publication Date: 2019-08-06
HENAN UNIV OF SCI & TECH
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However, Fe powder cannot be removed by this method.
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Embodiment 1
[0044]The surface of the carbon fiber is electroless nickel-plated, and the carbon fiber is pretreated first:
[0045] (1) Degreasing treatment: Burn the target carbon fiber at high temperature in a muffle furnace, the burning temperature is 400°C, and the burning time is 15 minutes; after burning, soak it in acetone solution for 10 minutes and take it out. Treatment, so that the attachment can be better removed, and then washed with deionized water until neutral.
[0046] (2) Coarsening treatment: put the degreased carbon fiber into the roughening solution of 98% concentrated nitric acid: 65% concentrated sulfuric acid = 1:1, and ultrasonically treat it for 1 hour. Afterwards, it is neutralized with NaOH and washed with deionized water until neutral, which not only ensures the formation of grooves on the surface of the carbon fiber, but also does not weaken the strength of the carbon fiber.
[0047] (3) Sensitization treatment: use a sensitization solution to sensitize the r...
Embodiment 2
[0051] (1) Degreasing treatment: burn 2g of carbon fiber in a muffle furnace at high temperature, the burning temperature is 450°C, and the burning time is 13 minutes; after burning, soak in acetone solution for 6 minutes and take it out. Treatment, so that the attachment can be better removed, and then washed with deionized water until neutral.
[0052] (2) Coarsening treatment: put the degreased carbon fiber into the roughening solution of 86% concentrated nitric acid: 70% concentrated sulfuric acid = 1:1, and ultrasonically treat it for 0.5h. Then titrate and neutralize with 1% KOH solution to PH=7, take out the carbon fiber and wash it further with deionized water.
[0053] (3) Sensitization treatment: use a sensitization solution to sensitize the roughened carbon fiber. The sensitizing solution is 25g / L SnCl 2 , 10ml / L HCl, when preparing the sensitization solution, first dissolve the concentrated HCl in deionized water, and then dissolve the SnCl 2 Dissolve the partic...
Embodiment 3
[0057] (1) Degreasing treatment: Burn the target carbon fiber in a muffle furnace at high temperature, the burning temperature is 500°C, and the burning time is 10 minutes; after burning, soak it in acetone solution for 15 minutes and take it out. Treatment, so that the attachment can be better removed, and then washed with deionized water until neutral.
[0058] (2) Coarsening treatment: put the degreased carbon fiber into the roughening solution of 98% concentrated nitric acid: 65% concentrated sulfuric acid = 1:1, and ultrasonically treat it for 1.5h. Then neutralize with NaOH solution and wash with deionized water until neutral.
[0059] (3) Sensitization treatment: use a sensitization solution to sensitize the roughened carbon fiber. The sensitizing solution is 25g / L SnCl 2 , 10ml / L HCl, when preparing the sensitization solution, first dissolve the concentrated HCl in deionized water, and then dissolve the SnCl 2 The particles were dissolved in aqueous HCl. This preve...
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Abstract
The invention provides a carbon fiber surface chemical nickel plating method. The method specifically comprises the steps that (1) pretreatment is conducted, and carbon fiber pretreatment is divided into degreasing treatment, roughing treatment, sensitization treatment and activation treatment; (2) plating solution preparation is conducted, specifically, deionized water is used as a solution, and the following components of main salt, a compounding ingredient, a stabilizer and a complexing agent are sequentially added into the solution, wherein the main salt is nickel sulfate hexahydrate with the density being 30-45 g / L, the compounding agent is ammonium chloride with the density being 25-30 g / L, and the stabilizer and the complexing agent are prepared in the mode that sodium citrate with the density being 15-25 g / L is prepared, and the PH value of the sodium citrate is adjusted to 10-11 through a sodium hydroxide solution; (3) pretreated carbon fibers are soaked into the plating solution prepared in the step two, and after the temperature of the plating solution rises to 80-100 DEG C, a hydrazine hydrate solution with the density being 25 ml / L is slowly dropwise added into the plating solution for reduction; and (4) the reduced carbon fibers are stored in a vacuum drying box with the temperature being 80-100 DEG C to be dried. According to the carbon fiber surface chemical nickel plating method, the nickel plated carbon fibers are prepared through the method of hydrazine hydrate direct reduction, and other harmful elements are not introduced into the nickel plating process.
Description
technical field [0001] The invention relates to a method for nickel plating, in particular to a method for electroless nickel plating on the surface of carbon fibers. Background technique [0002] Carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. It not only has the intrinsic characteristics of carbon materials, but also has the machinability of fibers. It is a new type of reinforcing material. Carbon fiber has excellent characteristics such as low density, high specific modulus, high specific strength, high temperature resistance, radiation resistance, electrical conductivity, heat transfer, and small thermal expansion coefficient, so it has broad application prospects in aerospace and civil fields. [0003] However, the graphite-like structure of carbon fiber makes its surface inert and lacks active functional groups, so its adhesion to the matrix is poor, and there are a series of interface problems, which limi...
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