Modification method for surface hydrophilization of PVC plastic

A hydrophilization and modification technology, applied in the field of PVC plastic preparation, can solve the problems of droplet aggregation on the surface of plastic sheets, uneven surface modification, etc. Effect

Inactive Publication Date: 2014-10-01
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in an article in "Material Protection", "Application of Coupling Agents in the Pretreatment of PVC Plastic Ni-Cu-P Plating", three coupling agents KH550, KH560, and NTC-401 were used to carry out surface affinity for PVC plastics. Water-based modification replaces the traditional chromic acid roughening, but this method also has certain problems, such as the surface of the plastic sheet soaked in KH550 is prone to aggregation of droplets, and the surface modification is uneven after drying

Method used

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  • Modification method for surface hydrophilization of PVC plastic
  • Modification method for surface hydrophilization of PVC plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Modification treatment: Put the PVC plastic sample in ethanol in order to remove the mucous membrane on its surface, soak it in an aqueous solution of sodium hydroxide with a concentration of 10-30% to remove the surface grease, and polish the surface of the sample with sandpaper to roughen the surface. Soak in ferric hydroxide colloid at 55°C for 0.5 h. After the sample is taken out and dried, it is then sensitized with a 5-25 g / L stannous chloride aqueous solution.

[0027] The preparation method of ferric hydroxide colloid used in this example is: heat 40mL of distilled water to boiling, then dropwise add 6mL of ferric chloride aqueous solution with a mass percentage concentration of 1.5%, and keep it warm at 100°C for 2 minutes to prepare.

[0028] Activation: Before copper plating, soak the sensitized sample in silver ammonia solution for activation.

[0029] Application: Put the processed plated sample in the plating solution, and perform electroless copper plati...

Embodiment 2

[0031] Modification treatment: Put the PVC plastic sample in ethanol in order to remove the mucous membrane on its surface, soak it in an aqueous solution of sodium hydroxide with a concentration of 10-30% to remove the surface grease, and polish the surface of the sample with sandpaper to roughen the surface. Soak in ferric hydroxide colloid at 50°C for 1 h. After the sample is taken out and dried, it is then sensitized with a 5-25 g / L stannous chloride aqueous solution.

[0032] The preparation method of ferric hydroxide colloid used in this example is: heat 40mL of distilled water to boiling, then dropwise add 2.5 mL of ferric chloride aqueous solution with a concentration of 4.7% by mass, and keep warm at 100°C for 2 minutes to prepare.

[0033] Activation: Before copper plating, soak the sensitized sample in silver ammonia solution for activation.

[0034] Application: Put the processed plated sample in the plating solution, and perform electroless copper plating accordi...

Embodiment 3

[0036] Modification treatment: Put the PVC plastic sample in ethanol in order to remove the mucous membrane on its surface, soak it in an aqueous solution of sodium hydroxide with a concentration of 10-30% to remove the surface grease, and polish the surface of the sample with sandpaper to roughen the surface. Soak in ferric hydroxide colloid at 45°C for 2 hours. After the sample is taken out and dried, it is then sensitized with a 5-25 g / L stannous chloride aqueous solution.

[0037] The preparation method of ferric hydroxide colloid used in this example is: heat 40mL of distilled water to boiling, then dropwise add 1 mL of ferric chloride aqueous solution with a concentration of 9.2% by mass, and keep it warm at 100°C for 3 minutes to prepare it.

[0038] Activation: Before copper plating, soak the sensitized sample in silver ammonia solution for activation.

[0039] Application: Put the processed plated sample in the plating solution, and perform electroless copper plating...

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Abstract

A modification method for surface hydrophilization of PVC plastic relates to the technical field of PVC plastic preparation. The method comprises the following steps: conducting surface mucus membrane removing treatment on the PVC plastic with ethanol, soaking the treated PVC plastic in an alkali liquor to remove surface grease, carrying out surface polishing and coarsening, soaking the PVC plastic in ferric hydroxide colloid for modification treatment, and finally carrying out sensitization with a stannous chloride aqueous solution or a glucose aqueous solution. After modification, the PVC plastic has adsorptivity and can adsorb bibasic tin ions, so as to facilitate follow-up actification and copper plating. An obtained plating is uniform and is high in base body binding force. Moreover, environment-friendly requirements are met; through the adoption of the modification method, normal adhesion of a copper plating on the surface of the PVC plastic can be guaranteed, the surface is uniform, the electrical conductivity is high, and the adhesion capability is high.

Description

technical field [0001] The invention relates to the technical field of PVC plastic preparation, in particular to the modification technology of surface hydrophilization. Background technique [0002] Electroless copper plating technology is mainly used in printed circuit board hole metallization and plastic electroplating. Whether it is decorative or functional plastic electroplating, electroless copper plating can ensure a good conductive bottom layer. The plastic surface needs to be roughened before electroless copper plating. The purpose is to make the hydrophobic plastic surface hydrophilic and facilitate the deposition of the coating; on the other hand, it increases the contact area between the substrate and the coating to enhance the bonding force. [0003] For plastic electroplating, currently more commonly used chemical roughening systems include high chromium type roughening solution, potassium permanganate roughening solution, etc., which use the strong oxidizing p...

Claims

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Application Information

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IPC IPC(8): C23C18/20C23C18/28C23C18/30
Inventor 刘天晴韩晶晶
Owner YANGZHOU UNIV
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