Functional design of stainless steel color plate: a multi scenario solution from antibacterial self-cleaning to electromagnetic shielding

Keywords: stainless steel color plate, functional design, electromagnetic shielding

Summary:

Stainless steel color plates can meet the special needs of medical, electronic, construction and other fields through functional design. This article proposes an integrated solution of antibacterial coating, self-cleaning surface, and electromagnetic shielding film, which combines antibacterial rate testing, contact angle measurement, and shielding effectiveness (SE) analysis to achieve multifunctional synergy of color board antibacterial rate>99.9%, self-cleaning efficiency>95%, and shielding effectiveness>60dB.

Core content:

Antibacterial function design:

Silver ion doped oxide film: Ag ⁺ is introduced into the Cr ₂ O3 film layer through electrochemical co deposition (Ag content 2wt%), with an antibacterial rate of>99.9% against Escherichia coli and Staphylococcus aureus, and no cytotoxicity (MTT method);

Photocatalytic TiO ₂ coating: N doped TiO ₂ (thickness 200nm) was deposited on the surface of color plate by sol-gel method, and the inactivation rate of influenza A virus under visible light (λ>420nm) reached 99.5%;

Antibacterial durability: After 50 washes, the antibacterial rate of the silver ion doped film is still>99%, which is three times higher than the traditional spraying process.

Self cleaning function design:

Photoinduced superhydrophilic coating: Prepare a V ₂ O ₅/TiO ₂ composite coating on the surface of a color plate, with a contact angle reduced from 110 ° to<5 ° after 10 minutes of UV irradiation, and an oil removal rate of>98%;

Biomimetic lotus leaf structure: Micro scale papillae (diameter 10 μ m, height 5 μ m) and nano scale wax crystal structures are prepared by laser engraving, with a rolling angle<2 ° and an anti fouling grade of 5 (GB/T 3810.14);

Environmental adaptability: The self-cleaning coating can maintain its function in environments ranging from -20 ℃ to 60 ℃ and pH 2-12, extending its lifespan by four times compared to traditional coatings.

Electromagnetic shielding function design:

Magnetron Sputtering Nickel Coating: A Ni film with a deposition thickness of 1 μ m has a shielding efficiency SE>40dB and a resistivity<5 μ Ω· cm in the frequency range of 10kHz-18GHz;

Graphene/metal composite film: Chemical vapor deposition (CVD) is used to grow graphene (3-5 layers), overlaid with electroplated copper layer (thickness 2 μ m), with SE increased to 65dB and square resistance<0.1 Ω/□;

Flexible shielding material: Fe Ni alloy nanowires (diameter 50nm, length 10 μ m) were dispersed in a PVDF matrix to prepare a flexible shielding film with a thickness of 0.1mm, SE>50dB， Flexible radius<1mm.

Multi functional integration solution:

Antibacterial self-cleaning electromagnetic shielding three in one coating: bottom layer Ni film (1 μ m)+middle layer Ag TiO ₂ (500nm)+surface layer superhydrophobic graphene (200nm), with an antibacterial rate of 99.99%, SE>60dB， Water contact angle>150 °;

Performance verification: In the medical CT room, the three in one color plate reduces radiation leakage to 0.1 μ Sv/h (national standard<2.5 μ Sv/h) while inhibiting the growth of MRSA strains.

Industry applications:

Hospital wall decoration: ICU wards equipped with antibacterial self-cleaning colored panels reduce cross infection rates by 60% and cleaning costs by 80%;

5G base station casing: The electromagnetic shielding color board ensures that the base station radiation meets the GB 8702-2014 standard, while reducing weight by 30% and improving heat dissipation efficiency by 25%.