Sterilizing Composite Plating Layer with Nano-Needle Structure
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Solution Overview
Problem
Current electroplating technologies for kitchen and bathroom hardware products, particularly hexavalent chromium, pose environmental and health risks due to pollution and toxicity, and existing antibacterial solutions like Ag+ and Cu2+ have limited effectiveness and safety concerns, while traditional paint or powder coatings lack durability and wear resistance.
Innovation Solution
A sterilizing and environment-friendly composite plating layer comprising a semi-bright nickel layer, a high-sulfur nickel layer, and an environment-friendly white chromium composite sterilizing layer with a nano-needle structure, formed using electroplating with specific concentrations of ammonium salts and other raw materials, which provides a broad-spectrum antibacterial effect without the use of toxic metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hexavalent chromium electroplating is used to prepare white kitchen and bathroom products, then the products achieve a white appearance and durability, but the process causes severe environmental pollution and health hazards
Solution Approach 1:
The patent extracts and removes the harmful hexavalent chromium component from the electroplating process while retaining the beneficial functions of white appearance and durability through alternative materials that do not cause environmental pollution or health hazards
Solution Approach 2:
The patent changes the chemical composition parameters of the electroplating solution by replacing hexavalent chromium with alternative substances, thereby maintaining the functional properties of the plating layer while eliminating the toxic effects
2Reliability
If Ag+ or Cu2+ composite materials are added to electroplating chromic acid solution to achieve antibacterial function, then antibacterial properties are obtained, but silver chromate precipitates and the antibacterial function is lost
Solution Approach 1:
The patent extracts the antibacterial ammonium salt component from the plating solution after electroplating and deposits it onto the plating layer surface, separating it from the chromic acid solution to prevent precipitation reactions while maintaining antibacterial effectiveness
Solution Approach 2:
The patent performs preliminary electroplating to create the base plating layer with white appearance and durability, then subsequently adds the antibacterial ammonium salt layer to achieve antibacterial function without interfering with the chemical stability of the plating solution
3Reliability
If antibacterial materials containing nano Ag+ are sprayed on the product surface to achieve antibacterial effect, then antibacterial function is obtained, but the materials are easily absorbed by sweat pores and damage human organs
Solution Approach 1:
The patent uses ammonium salt as a temporary antibacterial agent that forms a layer on the plating surface, providing antibacterial protection during product use, and can be replaced or degraded over time without accumulating toxic effects in the human body like heavy metals
4Reliability
If ammonium salt liquids are sprayed on objects to achieve antibacterial effect, then antibacterial action is obtained, but the effect fails after the liquid dries, resulting in short antibacterial life
Solution Approach 1:
The patent creates a composite structure by electroplating the base metal layer first, then depositing ammonium salt crystals on the surface, forming a stable composite plating layer that maintains antibacterial activity after drying and significantly extends the duration of antibacterial effect
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution offers a safe, durable, and effective antibacterial coating that is visually appealing, with a nano-needle structure enhancing sterilization efficacy and corrosion resistance, while avoiding the health and environmental hazards associated with traditional methods.
Implementation Method 1
The semi-bright nickel layer is disposed on a substrate having a sterilizing requirement; the high-sulfur nickel layer is disposed on the surface of a side of the semi-bright nickel layer away from the substrate; the environment-friendly white chromium composite sterilizing layer is disposed on the surface of a side of the high-sulfur nickel layer away from the substrate
Data Source
AI summary
A sterilizing and environment-friendly composite plating layer, a preparation method therefor, and a sterilizing and environment-friendly product. The sterilizing and environment-friendly composite plating layer comprises: a semi-bright nickel layer, a high sulfur nickel layer, and an environment-friendly white chromium composite sterilizing layer; the semi-bright nickel layer is disposed on a substrate that has a sterilizing requirement; the high sulfur nickel layer is disposed on a surface of the side of the semi-bright nickel layer away from the substrate; the environment-friendly white chromium composite sterilizing layer is disposed on a surface of the side of the high sulfur nickel layer away from the substrate; the environment-friendly white chromium composite sterilizing layer has a nano-needle structure and is formed by a sterilizing ammonium salt-containing composite raw material; and the concentration of the sterilizing ammonium salt in the composite raw material is 50 g/L to 100 g/L.