Positively charged filter material with ability for removing charged particles efficiently, and method for producing same
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Solution Overview
Problem
Existing water treatment technologies struggle to efficiently remove negatively charged organic/inorganic particles, heavy metal ions, and pathogenic microorganisms due to the use of harmful materials like glass fiber, and face issues with flow rate, filtration pressure, and productivity.
Innovation Solution
A positively charged filter material is developed using a porous support of polypropylene, polyethylene, polyester, or nylon fibers, surface-modified by atmospheric-pressure plasma treatment, with a positively charged coating layer formed by a composition of solvents, polyfunctional amine compounds, and crosslinking agents, achieving a weight ratio of 5-15% of the support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass fiber is used as a basic filter medium and positively charged inorganic compounds are added during manufacture, then the filter has antiviral ability and can remove viruses, but the filter material becomes harmful (carcinogenic concerns) and the product group cannot be diversified
Solution Approach 1:
The patent extracts and removes the harmful glass fiber component from the filter medium, replacing it with safe organic fibers (polyester, polypropylene, polyacrylonitrile). The antiviral function is maintained by applying a positively charged coating layer to these safe fiber materials, thus separating the harmful substrate from the desired function.
Solution Approach 2:
The patent changes the fundamental material parameter from inorganic glass fiber to organic synthetic fibers. This parameter change eliminates carcinogenic concerns while maintaining filtration and antiviral capabilities through the addition of a positively charged coating layer that attracts and captures viruses.
2Reliability
If glass fiber with added compounds is used to create a positively charged filter, then virus removal capability is achieved, but the product group cannot be diversified due to the specific compounds required
Solution Approach 1:
The patent uses a universal positively charged coating composition that can be applied to multiple types of organic fiber materials (polyester, polypropylene, polyacrylonitrile). This universal coating approach enables the same antiviral mechanism to work across different fiber types, allowing product diversification while maintaining virus removal capability.
Solution Approach 2:
The patent copies the essential antiviral mechanism (positive charge attraction) from glass fiber-based filters and replicates it using organic fibers with a coating layer. This copying of the functional principle without the harmful substrate enables both virus removal and product diversification.
3Productivity
If conventional filtration methods are used, then basic filtration is achieved, but negatively charged organic/inorganic particles, heavy metal ions and pathogenic microorganisms cannot be efficiently removed
Solution Approach 1:
The patent converts the electrostatic repulsion problem into a benefit by giving the filter medium a positive charge. Since most contaminants (viruses, organic matter, heavy metals) carry negative charges, the positively charged filter attracts and captures them through electrostatic attraction, transforming the challenge of charged particle removal into an advantageous mechanism.
Solution Approach 2:
The patent creates a composite structure combining organic fibers with a positively charged coating layer. This composite material integrates the mechanical filtration properties of the fiber matrix with the electrostatic attraction properties of the coating, achieving both basic filtration and enhanced removal of charged particles.
4Reliability
If high coagulation treatment, activated carbon adsorption and membrane filtration are used to remove trace contaminants, then removal ability is improved, but economic costs and technical problems increase
Solution Approach 1:
The patent changes the charge parameter of the filter medium from neutral to positive, enabling electrostatic attraction of contaminants. This parameter change allows the filter to achieve enhanced removal capability without requiring additional treatment stages, reducing both economic cost and technical complexity compared to multi-step processes.
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 filter material exhibits excellent selective removal performance for negatively charged particles and pathogens, is less harmful, maintains high flow rate and filtration pressure, and improves productivity.
Implementation Method 1
a porous support which includes at least one fiber selected from polypropylene (PP) fiber, polyethylene (PE) fiber, polyester fiber, nylon fiber and cellulose fiber and is surface-modified by atmospheric-pressure plasma surface treatment
Implementation Method 2
a crosslinking agent that performs an epoxy reaction with the polyfunctional amine compound on the surface and inside of the porous support
Implementation Method 3
a positively charged filter material with excellent ability for removing charged particles efficiently... having the ability to selectively remove efficiently, in water, negatively charged organic/inorganic particles, heavy metal ions and pathogenic microorganisms
Data Source
AI summary
The present invention relates to a positively charged filter material with excellent ability for removing charged particles efficiently, and a method for producing the same, and more specifically to a positively charged filter material having the ability to selectively remove efficiently, in water, negatively charged organic/inorganic particles, heavy metal ions and pathogenic microorganisms, and a method for producing the same.