PPS (polyphenylene sulfite) and glass fiber composite material surface metallization pretreatment process as well as product and application thereof

Abstract

The invention discloses a PPS and glass fiber composite material surface metallization pretreatment process and a product and application thereof, and belongs to the technical field of surface treatment.The PPS and glass fiber composite material surface metallization pretreatment process comprises the following steps that after being subjected to acid treatment, a base material is sequentially placed in a first organic compound and a second organic compound to be soaked, and finally, activating the surface of the base material through a palladium activation process to form a high-activity catalyst layer, carrying out tin removal treatment through an accelerant to remove redundant tin on the surface, and carrying out chemical plating to form a metal layer, thereby completing the surface metallization pretreatment of the base material. The base material is a composite material of PPS and glass fibers, and the mass fraction of the glass fibers in the composite material is 30-50%. The invention provides the surface metallization pretreatment process for the PPS and glass fiber composite material, and the bonding performance of the material surface and the metal layer is excellent. The composite material treated by the method can be widely applied to chemical plating or electroplating, and has definite industrial operability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of special composite material surface metallization pretreatment, especially relates to a PPS and glass fiber composite material surface metallization pretreatment process, products and applications thereof. BACKGROUND

[0002] PPS (Polyphenylene Sulfide) is a high-performance thermoplastic engineering plastic. After adding 30-50% glass fiber, it forms a composite material. The addition of glass fiber greatly improves the tensile strength and bending strength of PPS, which enables the composite material to withstand greater external force without easy deformation. Its elastic modulus also increases significantly, and the material's rigidity is enhanced, providing good impact resistance. In terms of thermal performance, it has high thermal stability and can withstand temperatures up to 200-240℃ without softening or deforming. The thermal expansion coefficient of PPS material after glass fiber reinforcement is reduced. In terms of chemical properties, this composite material has good chemical corrosion resistance and good resistance to most organic solvents, acids, bases and other chemicals, and enhanced hydrolysis resistance. Compared to pure PPS, the composite material after adding glass fiber has improved hydrolysis resistance in humid environments or when exposed to moisture. This allows it to better maintain its performance in applications that may be exposed to water or high humidity environments, such as outdoor electrical equipment enclosures or parts of underwater equipment, extending its service life. PPS fiber composite material has become an important material in the automotive, electronics, aerospace and other fields due to its high temperature resistance, chemical corrosion resistance, high rigidity, flame retardance and other characteristics. In the future, with the advancement of fiber reinforcement technology and processing technology, its application range will further expand.

[0003] Surface metallization of composite materials refers to the process of forming a metal layer on the surface of a fiber board through physical or chemical methods, allowing it to exhibit metal properties such as conductivity, luster, wear resistance, etc. This process typically involves surface treatment, metal deposition and post-treatment steps, and is widely used in decoration, electronics, construction and other fields. There are two methods for surface metallization pretreatment of PPS and glass fiber (containing 30-50%) composite materials. One is thermal spraying, which sprays molten metal particles (such as zinc, aluminum) onto the surface of the composite material. This method has the disadvantages of environmental pollution, weak adhesion, rough surface and other shortcomings. The other method is vacuum coating. Physical vapor deposition (PVD) is a process in which metal (such as aluminum, titanium) is evaporated or sputtered onto the surface of the fiber board in a vacuum environment, or chemical vapor deposition (CVD) generates a metal film (such as gold plating, silver plating) on the surface through gas reaction. Although this method is environmentally friendly, it requires a vacuum environment and has high equipment costs.

[0004] Therefore, how to provide a PPS and glass fiber composite material surface metallization pretreatment method with simple operation and low cost is a technical problem that those skilled in the art need to solve urgently. SUMMARY

[0005] To solve the above technical problems, the present application provides a PPS and glass fiber composite material surface metallization pretreatment process.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A PPS and glass fiber composite material surface metallization pretreatment process, comprising the following steps:

[0008] After the substrate is treated with acid, it is sequentially immersed in a first organic compound and a second organic compound, and finally activated on the surface by a palladium activation process to form a high-activity catalytic layer. After removing the excess tin on the surface by a promoter, chemical plating is performed to form a metal layer, thereby completing the surface metallization pretreatment of the substrate.

[0009] The substrate is a PPS and glass fiber composite material, and the mass fraction of glass fiber in the composite material is 30-50%.

[0010] Beneficial effect: PPS and glass fiber composite materials cannot be directly used in the chemical plating process. The surface metallization pretreatment process in the present application can effectively form a metal layer on the surface of the PPS and glass fiber composite material, and further be used for chemical plating or electroplating.

[0011] Preferably, the acid treatment is to immerse the substrate in concentrated sulfuric acid, and continuous stirring is performed during the immersion process to ensure uniform activation of the substrate surface.

[0012] Preferably, the temperature of the acid treatment is 50-80℃, and the time is 10-30min.

[0013] Beneficial effect: In the present application, concentrated sulfuric acid is used to change the structure of the surface, and the surface changes from hydrophobicity to hydrophilicity without damaging the substrate.

[0014] Preferably, the first organic compound includes hydrophilic groups such as -OH, -NH2, -SO3H, and specifically includes one or more of 3-aminopropyl triethoxysilane, tetraethoxysilane, tetramethoxysilane, aminopropyl trimethoxysilane, N-methyl-3-aminopropyl trimethoxysilane, 3-glycidyl ether propyl triethoxysilane, 3-[(2,3)-epoxypropoxy] propyl methyl dimethoxysilane, 3-aminopropyl trimethoxysilane, diethylenetriamine propyl trimethoxysilane, and polyethylene diamine.

[0015] More preferably, the first organic compound comprises the following raw materials in mass fraction:

[0016] N-methyl-3-aminopropyl trimethoxysilane 3%, 3-glycidyl ether oxypropyl triethoxysilane 2%, diethylenetriamine propyl trimethoxysilane 2%, polyethylene diamine 1%, and the rest is ethanol.

[0017] Preferably, the second organic compound aqueous solution comprises one or more of polyethylene imine, ethylene amine, polyethylene diamine and polyethylene amine.

[0018] More preferably, the second organic compound comprises the following raw materials in mass fraction:

[0019] Polyethylene imine 5%, ethylene amine 3%, polyethylene diamine 2%, and the rest is pure water.

[0020] Preferably, the temperature of the two immersions is 30-90℃, and the time is 5-20min.

[0021] Beneficial effects: The composite material after acid treatment is immersed in the organic compound and the organic compound in turn, realizing the transformation of the PPS and glass fiber composite material to super-hydrophilic.

[0022] In the palladium activation treatment, the activator used is water as the solvent, comprising the following raw materials:

[0023] Palladium chloride 300mg / l, hydrochloric acid 200ml / l, sodium chloride 50g / l, tin chloride 6g / l.

[0024] Beneficial effects: Palladium activation is a colloidal palladium activation process for electroplating on non-metal substrates, forming a thin and fine uniform Pb / Sn colloid on the surface of the composite material, providing a catalytic center (fine palladium metal particles) for the subsequent electroless nickel plating / copper plating, forming a dense and fine electroless copper / nickel plating layer with strong adhesion.

[0025] Preferably, the tin removal treatment is that the composite material after activation treatment is immersed in a promoter solution at 20-40℃ to remove the excess tin on the surface, i.e. the tin removal treatment is completed.

[0026] Preferably, the promoter solution is obtained by mixing the promoter and concentrated sulfuric acid.

[0027] The promoter uses water as the solvent and comprises the following raw materials: sodium chloride 17 g / l, hydroxylamine sulfate 2.4 g / l, and a special mixture 0.6 g / l.

[0028] The special mixture comprises sodium chloride, ammonium hydrogen fluoride and monoethanolamine, and the several substances can be mixed in any proportion.

[0029] Preferably, the plating tank is equipped with a heater, and the plating tank is provided with a temperature display and an automatic temperature control system.

[0030] The activation treatment time is 8 min.

[0031] Preferably, the electroless plating is electroless copper plating or electroless nickel plating; and / or,

[0032] The thickness of the metal layer is 1-2 µm.

[0033] A surface metallized PPS and glass fiber composite material is prepared by the surface metallization pretreatment process of the PPS and glass fiber composite material.

[0034] After the surface metallization of the surface metallized PPS and glass fiber composite material, the next step of surface treatment can be further carried out by electroless plating or electroplating according to the product demand.

[0035] A surface metallized PPS and glass fiber composite material in the application of surface electroless plating or electroplating.

[0036] Compared with the prior art, the application has the following advantages and technical effects:

[0037] The application provides a surface metallization pretreatment process of a PPS and glass fiber composite material, which significantly improves the bonding performance and conductive performance of the material surface and the metal layer. The application adopts step-by-step acid treatment and double-component organic compound soaking, and cooperates with a palladium activation process, effectively solves the problem of insufficient adhesion of the metal plating layer in the traditional process. Through the synergistic effect of the first organic compound and the second organic compound (such as polyethylene diamine), a stable chemical bonding interface is constructed on the substrate surface, and the catalytically active layer is more uniformly distributed. And the tin removal treatment step in the application further removes the surface impurities, providing a high-cleanliness active surface for subsequent electroless plating / electroplating. Compared with the conventional method, the metallized composite material treated by the application can further carry out the next step of surface treatment by electroless plating or electroplating according to the product demand, and the process parameters have clear industrial operability. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of this application and its description together with the drawings make apparent to those skilled in the art the nature of the application. In the drawings:

[0039] Figure 1 The process flow chart of the surface metallization pretreatment process provided by the embodiments of the application. DETAILED DESCRIPTION

[0040] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0042] Unless otherwise specified, the raw materials in the embodiments of the present application are obtained by market purchase.

[0043] Unless otherwise specified, room temperature or normal temperature in the embodiments of the present application refers to 25±3℃.

[0044] Example 1

[0045] A surface metallization pretreatment process for a composite material of PPS and glass fiber, as shown in FIG. 1, includes the following steps: Figure 1

[0046] (1) Acid treatment: 1L of concentrated sulfuric acid is heated to 75℃ in a glass beaker, and continuously stirred. A composite material of PPS (polyphenylene sulfide) and glass fiber (containing 30%) with a size of 100mm × 100mm is cut into a square block with a size of 100mm × 100mm, and then immersed in the concentrated sulfuric acid for 20 minutes. After the immersion is completed, the composite material is taken out and washed with two passes of pure water, and then dried to obtain an acid-treated composite material.

[0047] (2) N-methyl-3-aminopropyltrimethoxysilane, 3-glycidyl ether oxypropyl triethoxysilane, diethylenetriamine propyl trimethoxysilane and polyethylene diamine are dissolved in ethanol to obtain a P1 organic chemical solution. The P1 organic compound includes the following mass fractions of raw materials: N-methyl-3-aminopropyltrimethoxysilane 3%, 3-glycidyl ether oxypropyl triethoxysilane 2%, diethylenetriamine propyl trimethoxysilane 2%, polyethylene diamine 1%, and the balance is ethanol.

[0048] The acid-treated composite material obtained in step (1) is placed in the P1 organic chemical solution, and immersed at 50℃ under continuous stirring for 10 minutes. After the immersion is completed, the composite material is taken out and washed with two passes of pure water to obtain a P1-treated composite material.

[0049] ​(3) Polyethyleneimine, ethyleneamine, polyethylene diamine are added into water to mix evenly to obtain P2 organic chemical solution, wherein the P2 organic chemical solution includes the following mass fractions of raw materials: polyethyleneimine 5%, ethyleneamine 3%, polyethylene diamine 2%, and the balance is pure water.

[0050] The P1 treated composite material obtained in step (2) is placed in the P2 organic compound and soaked at 80°C under continuous stirring for 8 min. After soaking, it is taken out and washed with two passes of pure water to obtain a P2 treated composite material.

[0051] (4) Palladium activation treatment: the P2 treated composite material obtained in step (3) is placed in a palladium activation solution and activated at room temperature for 8 min. After activation, it is taken out and washed with two passes of pure water to obtain an activated composite material. The palladium activation solution uses water as a solvent and includes the following: palladium chloride 300 mg / L, hydrochloric acid 200 ml / L, sodium chloride 50 g / L, and stannic chloride 6 g / L.

[0052] (5) The accelerator is mixed with concentrated sulfuric acid according to the ratio of 980 mL / L accelerator to 20 mL / L concentrated sulfuric acid (96%) in the accelerator solution to obtain an accelerator solution. The activated composite material is soaked in the accelerator solution at 35°C for 5 min to remove excess tin on the surface. After soaking, it is taken out and washed with two passes of pure water. The accelerator uses pure water as a solvent and includes the following raw materials: sodium chloride 17 g / l, hydroxylamine sulfate 2.4 g / l, and a proprietary mixture (mass ratio of sodium chloride, ammonium hydrogen fluoride, and monoethanolamine is 1:1:1) 0.6 g / l.

[0053] (6) A chemical copper plating solution is prepared, wherein the plating solution uses water as a solvent and includes the following raw materials: CuSO4·5H2O 19.5 g / L, free sodium hydroxide 9 g / L, and 37% formaldehyde 11 ml / L. The accelerator solution treated composite material obtained in step (5) is placed in the plating solution at 52°C for chemical copper plating for 10 min. After copper plating, it is taken out and washed with 3 passes of pure water and dried to complete the surface metallization pretreatment. Then electroplating or chemical plating can be performed on the surface of the composite material.

[0054] Example 2

[0055] A surface metallization pretreatment process for a composite material of PPS and glass fiber, as shown in Figure 1 , includes the following steps:

[0056] (1) Acid treatment: 1L of concentrated sulfuric acid is heated to 75°C in a glass beaker, continuously stirred, and a 100mm x 100mm PPS (polyphenylene sulfide) and glass fiber (containing 30%) composite material is cut into 100mm x 100mm squares and immersed in the concentrated sulfuric acid for 20 minutes. After immersion, the composite material is taken out and washed with two passes of pure water and dried to obtain an acid-treated composite material.

[0057] (2) N-methyl-3-aminopropyltrimethoxysilane, 3-glycidyl ether propyl triethoxysilane, diethylenetriamine propyl trimethoxysilane, and polyethylene diamine are dissolved in ethanol to obtain a P1 organic chemical solution, wherein the P1 organic compound includes the following mass fraction of raw materials: N-methyl-3-aminopropyltrimethoxysilane 3%, 3-glycidyl ether propyl triethoxysilane 2%, diethylenetriamine propyl trimethoxysilane 2%, polyethylene diamine 1%, and the balance is ethanol.

[0058] The acid-treated composite material obtained in step (1) is placed in the P1 organic chemical solution and immersed at 50°C under continuous stirring for 5 minutes. After immersion, the composite material is taken out and washed with two passes of pure water to obtain a P1-treated composite material.

[0059] (3) Polyethyleneimine, ethylene amine, and polyethylene diamine are mixed uniformly in water to obtain a P2 organic chemical solution, wherein the P2 organic chemical solution includes the following mass fraction of raw materials: polyethyleneimine 5%, ethylene amine 3%, polyethylene diamine 2%, and the balance is pure water.

[0060] The P1-treated composite material obtained in step (2) is placed in the P2 organic compound and immersed at 80°C under continuous stirring for 8 minutes. After immersion, the composite material is taken out and washed with two passes of pure water to obtain a P2-treated composite material.

[0061] (4) Palladium activation treatment: The P2-treated composite material obtained in step (3) is placed in a palladium activation solution and activated at room temperature for 8 minutes. After activation, the composite material is taken out and washed with two passes of pure water to obtain an activated composite material. The palladium activation solution uses water as a solvent and includes palladium chloride 300mg / L, hydrochloric acid 200ml / L, sodium chloride 50g / L, and tin chloride 6g / L.

[0062] (5) The accelerator and concentrated sulfuric acid were mixed in a ratio of 980 mL / L accelerator to 20 mL / L concentrated sulfuric acid (96%) to obtain an accelerator solution. The activated composite material was immersed in the accelerator solution at 35°C for 5 min to remove excess tin from the surface. After immersion, it was taken out and rinsed with pure water twice. The accelerator used pure water as a solvent and included the following raw materials: 17 g / L sodium chloride, 2.4 g / L hydroxylamine sulfate, and 0.6 g / L proprietary mixture (sodium chloride, ammonium bifluoride and monoethanolamine in a mass ratio of 1:1:1).

[0063] (6) Prepare a chemical nickel plating solution, wherein the electroplating solution uses water as a solvent and includes 26.0 g / L nickel sulfate hexahydrate with a pH of 4.7. The composite material treated with the accelerator solution obtained in step (5) is placed in the plating solution at 88°C for chemical copper plating for 5 minutes. After copper plating, it is removed and rinsed with three streams of pure water and dried to complete the surface metallization pretreatment. Electroplating or chemical plating can then be performed on the surface of the composite material.

[0064] Example 3

[0065] A surface metallization pretreatment process for PPS and glass fiber composites, such as Figure 1 As shown, it includes the following steps:

[0066] (1) Acid treatment: Heat 1L of concentrated sulfuric acid in a glass beaker to 85℃ and stir continuously. Cut the 100mm × 100mm PPS (polyphenylene sulfide) and glass fiber (containing 50%) composite material into 100mm × 100mm cubes, soak them in concentrated sulfuric acid for 25 minutes, remove them after soaking, wash them with pure water twice and blow them dry to obtain the acid-treated composite material.

[0067] (2) N-methyl-3-aminopropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, diethylenetriaminepropyltrimethoxysilane and polyethylenediamine are added to ethanol and dissolved to obtain P1 organic chemical solution, wherein the organic compound P1 includes the following raw materials in the following mass fractions: 3% N-methyl-3-aminopropyltrimethoxysilane, 2% 3-glycidyl etheroxypropyltriethoxysilane, 2% diethylenetriaminepropyltrimethoxysilane, 1% polyethylenediamine, and the balance is ethanol.

[0068] The acid-treated composite material obtained in step (1) was placed in P1 organic chemical solution and soaked for 10 min under continuous stirring at 50°C. After soaking, it was taken out and washed with two pure waters to obtain the P1-treated composite material.

[0069] (3) Polyethyleneimine, ethyleneamine, polyethylene diamine are added into water to mix evenly to obtain P2 organic chemical solution, wherein P2 organic chemical solution includes the following mass fraction of raw materials: polyethyleneimine 5%, ethyleneamine 3%, polyethylene diamine 2%, and the balance is pure water.

[0070] The P1 treated composite material obtained in step (2) is placed in P2 organic compound and soaked at 80°C under continuous stirring for 10 min, and after soaking is completed, it is taken out and washed through two pure water channels to obtain P2 treated composite material.

[0071] (4) Palladium activation treatment: the P2 treated composite material obtained in step (3) is placed in a palladium activation solution and activated at room temperature for 8 min, and after activation is completed, it is taken out and washed through two pure water channels to obtain activated composite material. The palladium activation solution uses water as solvent and includes the following: palladium chloride 300 mg / L, hydrochloric acid 200 ml / L, sodium chloride 50 g / L, and stannic chloride 6 g / L.

[0072] (5) The accelerator is mixed with concentrated sulfuric acid according to the proportion of 980 mL / L accelerator and 20 mL / L concentrated sulfuric acid (96%) in the accelerator solution to obtain the accelerator solution, and the activated composite material is soaked in the accelerator solution at 35°C for 5 min to remove excess tin on the surface, and after soaking is completed, it is taken out and washed through two pure water channels. The accelerator uses pure water as solvent and includes the following raw materials: sodium chloride 17 g / l, hydroxylamine sulfate 2.4 g / l, and a special mixture (mass ratio of sodium chloride, ammonium hydrogen fluoride and monoethanolamine is 1:1:1) 0.6 g / l.

[0073] (6) A chemical copper plating solution is prepared, wherein the plating solution uses water as solvent and includes the following raw materials: CuSO4.5H2O 19.5 g / L, free sodium hydroxide 9 g / L, and 37% formaldehyde 11 ml / L. The accelerator solution treated composite material obtained in step (5) is placed in the plating solution at 52°C for chemical copper plating for 10 min, and after copper plating is completed, it is taken out and washed through three pure water channels and dried to complete the surface metallization pretreatment. Then electroplating or chemical plating can be performed on the surface of the composite material.

[0074] Example 4

[0075] A surface metallization pretreatment process for a composite material of PPS and glass fiber, as shown in Figure 1 , includes the following steps:

[0076] (1) Acid treatment: 1L of concentrated sulfuric acid is heated to 85°C in a glass beaker, continuously stirred, and a 100mm x 100mm PPS (polyphenylene sulfide) and glass fiber (containing 50%) composite material is cut into 100mm x 100mm squares and immersed in the concentrated sulfuric acid for 25 minutes. After immersion, the composite material is taken out and washed with two passes of pure water and dried to obtain an acid-treated composite material.

[0077] (2) N-methyl-3-aminopropyltrimethoxysilane, 3-glycidyl ether propyl triethoxysilane, diethylenetriamine propyl trimethoxysilane, and polyethylene diamine are dissolved in ethanol to obtain a P1 organic chemical solution, wherein the P1 organic compound includes the following mass fraction of raw materials: N-methyl-3-aminopropyltrimethoxysilane 3%, 3-glycidyl ether propyl triethoxysilane 2%, diethylenetriamine propyl trimethoxysilane 2%, polyethylene diamine 1%, and the balance is ethanol.

[0078] The acid-treated composite material obtained in step (1) is placed in the P1 organic chemical solution and immersed at 50°C under continuous stirring for 10 minutes. After immersion, the composite material is taken out and washed with two passes of pure water to obtain a P1-treated composite material.

[0079] (3) Polyethyleneimine, ethylene amine, and polyethylene diamine are mixed uniformly in water to obtain a P2 organic chemical solution, wherein the P2 organic chemical solution includes the following mass fraction of raw materials: polyethyleneimine 5%, ethylene amine 3%, polyethylene diamine 2%, and the balance is pure water.

[0080] The P1-treated composite material obtained in step (2) is placed in the P2 organic compound and immersed at 80°C under continuous stirring for 8 minutes. After immersion, the composite material is taken out and washed with two passes of pure water to obtain a P2-treated composite material.

[0081] (4) Palladium activation treatment: The P2-treated composite material obtained in step (3) is placed in a palladium activation solution and activated at room temperature for 8 minutes. After activation, the composite material is taken out and washed with two passes of pure water to obtain an activated composite material. The palladium activation solution uses water as a solvent and includes palladium chloride 300mg / L, hydrochloric acid 200ml / L, sodium chloride 50g / L, and tin chloride 6g / L.

[0082] (5) The promoter solution is prepared by mixing the promoter and concentrated sulfuric acid in a ratio of 980 mL / L promoter to 20 mL / L concentrated sulfuric acid (96%), and the activated composite material is immersed in the promoter solution at 35°C for 5 min to remove the excess tin on the surface, and then taken out and washed with pure water for two times. The promoter is dissolved in pure water, and includes the following raw materials: sodium chloride 17 g / l, hydroxylamine sulfate 2.4 g / l, and a special mixture (mass ratio of sodium chloride, ammonium hydrogen fluoride and monoethanolamine is 1:1:1) 0.6 g / l.

[0083] (6) The electroless nickel plating solution is prepared, and the plating solution is dissolved in water, including nickel sulfate hexahydrate 26.0 g / L, and the pH is 4.7. The composite material treated by the promoter solution obtained in step (5) is placed in the plating solution at 88°C for electroless copper plating for 5 min, and then taken out and washed with pure water for 3 times and dried to complete the surface metallization pretreatment. Then electroplating or electroless plating can be performed on the surface of the composite material.

[0084] Technical effects:

[0085] 1. The thickness and adhesion of the plating layer of the composite material after surface metallization pretreatment obtained in examples 1-4 are detected, wherein the thickness of the plating layer is detected by XRF film thickness meter, the thickness of 5 points on the front and back surfaces is detected, and the average thickness is calculated. The adhesion of the plating layer and the composite material is tested by using 3M special adhesive tape. The thickness and adhesion results of the obtained plating layer are shown in Table 1:

[0086] Table 1

[0087]

[0088] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A surface metallization pre-treatment process of a composite of PPS and glass fibers, characterized in that, The method comprises the following steps: After the substrate is treated with acid, the substrate is sequentially immersed in a first organic compound and a second organic compound, and then the surface of the substrate is activated by a palladium activation process to form a high-activity catalytic layer. After the surface is treated with a promoter to remove excess tin, a metal layer is formed by electroless plating, and the surface metallization pretreatment of the substrate is completed. The substrate is a composite material of PPS and glass fiber, and the mass fraction of glass fiber in the composite material is 30-50%.

2. A pre-treatment process for surface metallization of a composite of PPS and glass fibers according to claim 1, characterized in that, The acid treatment is immersion treatment of the substrate in concentrated sulfuric acid, and continuous stirring is performed during the immersion process to ensure uniform activation of the surface of the substrate.

3. A pre-treatment process for the surface metallization of a composite material of PPS and glass fibers according to claim 2, characterized in that, The temperature of the acid treatment is 50-80°C, and the time is 10-30 min.

4. The pre-treatment process for surface metallization of a PPS and glass fiber composite according to claim 1, characterized in that, The first organic compound includes one or more of 3-aminopropyl triethoxysilane, tetraethoxysilane, tetramethoxysilane, aminopropyl trimethoxysilane, N-methyl-3-aminopropyl trimethoxysilane, 3-glycidyloxypropyl triethoxysilane, 3-[(2,3)-epoxypropoxy]propyl methyl dimethoxysilane, 3-aminopropyl trimethoxysilane, diethylenetriamine propyl trimethoxysilane, and polyethylene diamine.

5. The pre-treatment process for surface metallization of a PPS and glass fiber composite according to claim 1, characterized in that, The second organic compound includes one or more of polyethylene imine, ethylene amine, polyethylene diamine, and polyethylene amine.

6. The pre-treatment process for surface metallization of a PPS and glass fiber composite according to claim 1, characterized in that, The temperature of the two immersions is 30-90°C, and the time is 5-20 min.

7. The pre-treatment process for surface metallization of a PPS and glass fiber composite according to claim 1, characterized in that, The activation treatment time is 8 min.

8. The pre-treatment process for surface metallization of a PPS and glass fiber composite according to claim 1, characterized in that, The electroless plating is electroless copper plating or electroless nickel plating; and / or The thickness of the metal layer is 1-2 µm.

9. A surface metallized composite material of PPS and glass fiber prepared by the surface metallization pretreatment process of the composite material of PPS and glass fiber according to any one of claims 1-8.

10. Use of the surface metallized composite material of PPS and glass fiber according to claim 9 in electroless plating or electroplating.

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