Antibacterial Polyester via Silver Nanoparticles on Glass Beads
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Solution Overview
Problem
Existing materials with antibacterial and antifungal properties, such as food packaging and medical equipment surfaces, face challenges in maintaining effectiveness over time and often compromise transparency and haze when using coating or internal addition methods.
Innovation Solution
An antibacterial and antifungal polyester material is developed by dispersing glass beads with silver nanoparticles on their surface within a polyester resin substrate through melt extrusion molding, maintaining transparency and low haze while providing broad-spectrum protection against bacteria and fungi.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coating method or spray method is used to enable antibacterial and antifungal properties, then transparency is maintained, but the antibacterial and antifungal properties cannot be maintained for a desired time
Solution Approach 1:
The antibacterial and antifungal additives are incorporated into the polyester resin during the extrusion molding process, enabling the material to have antibacterial and antifungal properties from the beginning of its production, rather than applying them later through coating or spray methods
Solution Approach 2:
The patent creates a composite material by combining polyester resin with antibacterial and antifungal additives (such as silver nanoparticles, zinc oxide, or other antimicrobial agents) through melt extrusion molding, resulting in a material that maintains both transparency and durable antibacterial properties
2Reliability
If internal addition method is used to enable antibacterial and antifungal properties, then the material can maintain properties internally, but the transparency is greatly reduced and haze is greatly increased
Solution Approach 1:
The patent optimizes parameters such as the concentration of antibacterial additives, particle size of fillers, and processing conditions during melt extrusion molding to achieve the right balance between maintaining transparency and providing effective antibacterial properties
Solution Approach 2:
The antibacterial and antifungal additives are distributed uniformly throughout the polyester resin matrix, ensuring that the antibacterial properties are present where needed without creating concentrated areas that would increase haze or reduce transparency
3Adaptability or versatility
If conventional antibacterial additives are used, then limited types of bacteria can be targeted, but the material lacks broad-spectrum protection against bacteria and fungi
Solution Approach 1:
The patent employs antibacterial and antifungal additives with broad-spectrum activity that can effectively protect against multiple types of bacteria and fungi, making the material universally effective against diverse pathogens rather than targeting only specific limited types
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 material achieves long-lasting antibacterial and antifungal effects with high transparency and low haze, suitable for applications in food packaging and medical equipment, effectively inhibiting a range of pathogens including Escherichia coli and Aspergillus niger.
Implementation Method 1
the plurality of silver nanoparticles are distributed on an outer surface of each of the glass beads by means of physical adsorption
Data Source
AI summary
An antibacterial and antifungal polyester material is provided, which includes a polyester resin substrate material and a plurality of functional polyester master-batches. The functional polyester master-batches are dispersed in the polyester resin substrate material. Each of the functional polyester master-batches includes a polyester resin matrix material and an antibacterial and antifungal additive. The antibacterial and antifungal additive includes a plurality of glass beads. The glass beads are dispersed in the polyester resin matrix material, and a plurality of silver nanoparticles are distributed on an outer surface of each of the glass beads.