Bismuth Ion Filter Membrane with Flake Graphite Mediator
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Solution Overview
Problem
Existing bismuth ion filter membranes suffer from weak binding forces between bismuth ions and the filter membrane substrate, leading to reduced antibacterial performance due to ion detachment during water washing.
Innovation Solution
A preparation method involving pre-treatment of a filter membrane substrate with a non-ionic chelating agent, embedding bismuth ions using a chelated bismuth ion solution, and post-treatment to enhance the bonding strength between bismuth ions and the filter membrane substrate, utilizing flake graphite and chitosan to improve ion retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bismuth ions are loaded onto filter membrane substrate, then antibacterial performance is improved, but binding force between bismuth ions and substrate is weak causing ion detachment during water washing
Solution Approach 1:
The patent introduces flake graphite as an intermediary carrier between the filter membrane substrate and bismuth ions. The flake graphite is first loaded onto the substrate, then bismuth ions are loaded onto the flake graphite. This two-stage loading process strengthens the binding force and prevents ion detachment during water washing, while maintaining antibacterial performance.
2Reliability
If platinum ions are used for antimicrobial application, then antimicrobial properties are improved, but production cost increases significantly
Solution Approach 1:
The patent replaces expensive platinum ions with bismuth ions, which are significantly cheaper while maintaining effective antimicrobial properties. The flake graphite carrier enables stable loading and retention of bismuth ions, ensuring long-lasting antimicrobial效果 without the high cost of precious metals.
3Ease of manufacture
If bismuth ions are added to enhance silver ion effects, then cost is reduced and efficiency is improved, but binding stability becomes a limiting factor
Solution Approach 1:
The flake graphite acts as a stable intermediary carrier that enables reliable retention of bismuth ions. This解决了 the binding stability issue, allowing the cost-effective bismuth-silver ion combination to be successfully implemented with maintained ion retention during water washing and正常使用.
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 method significantly enhances the antibacterial performance and washability of the bismuth ion filter membrane, achieving long-lasting antimicrobial effects and reducing the cost of precious metals by 5 to 10 times.
Implementation Method 1
placing the filter membrane substrate into a cleaning machine, adding a non-ionic chelating agent solution and water to the cleaning machine, soaking and stirring the filter membrane substrate
Implementation Method 2
utilizing flake graphite and chitosan to improve ion retention
Data Source
AI summary
A preparation method of a bismuth ion filter membrane includes: placing a filter membrane substrate into a cleaning machine, adding a non-ionic chelating agent solution and water, treating the filter membrane substrate for 1-2 hours, then dehydrating the filter membrane substrate to obtain a filter membrane substrate A; adding the filter membrane substrate A and a chelated bismuth ion solution to a reactor, followed by adding a chelating agent solution, and reacting to obtain a filter membrane substrate embedded with bismuth ions; and dehydrating and drying the filter membrane substrate embedded with the bismuth ions to obtain the filter membrane. Due to the bismuth ions, it can develop bactericidal effects within a distance of 1-3 feet and also enhance negative oxygen ions. Using the bismuth ions to make filter membranes and masks provides a cost-effective material, which is ten times cheaper than silver ions, making it economically advantageous.