Polymer Filter Coating with Ion Beam Pretreatment for UV Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antibacterial and antiviral filters face issues with poor coating durability and UV durability, particularly with materials like PTFE, leading to adhesive strength challenges and vulnerability to ultraviolet damage.
Innovation Solution
A polymer filter with a surface-modified layer formed through ion beam pretreatment, followed by a coating of metal or metal oxide, enhances binding strength and durability, using gases like oxygen or hydrogen for pretreatment and optimizing sputtering conditions for improved adhesive and UV protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an antibacterial or antiviral material is coated on a fiber filter material, then the filter gains antibacterial or antiviral function, but the coating durability is poor and the material is easily released
Solution Approach 1:
The fiber surface is subjected to corona discharge treatment or plasma treatment before coating to modify the surface properties and improve adhesion. This preliminary action creates a more receptive surface that enhances the bonding between the fiber and the antibacterial material, preventing easy release while maintaining function
Solution Approach 2:
An adhesive layer or coupling agent is introduced as an intermediary between the fiber surface and the antibacterial material. This intermediate layer acts as a bridge that improves the bonding strength and prevents the antibacterial material from being easily released, thereby enhancing coating durability
2Ease of manufacture
If a polymer filter is used for the antibacterial or antiviral filter, then the filter structure is flexible and manufacturable, but the polymer may be cured by ultraviolet rays to be damaged
Solution Approach 1:
A protective coating layer is applied on the polymer filter surface that acts as a sacrificial protective layer. This coating absorbs or blocks ultraviolet radiation, protecting the underlying polymer from curing and damage. The coating is designed to be replaceable or self-regenerating, maintaining the polymer's integrity while allowing UV exposure
3Reliability
If PTFE is used as the filter material, then the filter has good chemical resistance and low friction, but the adhesive strength with coating is very low making it difficult to secure coating durability
Solution Approach 1:
The PTFE surface undergoes plasma treatment or corona discharge treatment before coating to modify its surface energy and create anchoring sites. This preliminary surface modification breaks the low-energy PTFE surface characteristics, enabling better adhesion of the antibacterial coating while preserving the bulk PTFE's chemical resistance and low friction properties
Solution Approach 2:
The surface properties of PTFE are changed through physical or chemical treatment to alter its adhesive characteristics. By modifying surface parameters such as surface energy, roughness, or chemical composition through treatment, the adhesive strength is improved without changing the bulk material properties that provide chemical resistance
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 provides improved coating durability and UV resistance, maintaining effective antibacterial and antiviral activity against pathogens like Staphylococcus aureus and Klebsiella pneumoniae, and viruses such as SARS-CoV-2, with enhanced aesthetic appeal and efficient manufacturing processes.
Implementation Method 1
a polymer filter which is ion beam pretreated to have a surface-modified layer formed thereon so that a coating layer is bound to a polymer surface
Implementation Method 2
a coating layer of a metal or a metal oxide which is applied on the polymer filter
Data Source
AI summary
Provided is an antibacterial or antiviral filter having improved coating durability and UV durability. More particularly, a polymer filter which may express an antibacterial or antiviral function having both improved coating durability of various filter materials and improved UV durability, and a method of manufacturing the same are provided.