Sulfonated Polyester-Silver Nanoparticle Composite Filaments for 3D Printing
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Solution Overview
Problem
There is a need for antibacterial composite materials in 3D printing, particularly in Fused Deposition Modelling (FDM), as existing materials do not effectively inhibit bacterial, microbial, viral, or fungal growth, and washing alone is insufficient to sterilize 3D printed products.
Innovation Solution
Development of a sulfonated polyester composite filament with silver nanoparticles dispersed throughout the matrix, synthesized using an organic-free solvent process, which forms a stable and well-dispersed silver nanoparticle composite that inhibits bacterial growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional 3D printing materials are used, then the printing process is simple and materials are readily available, but the materials do not effectively inhibit bacterial, microbial, viral, or fungal growth
Solution Approach 1:
The patent applies composite materials by combining sulfonated polyester matrix with silver nanoparticles to create a material that possesses both structural integrity and antibacterial properties. The silver nanoparticles are dispersed throughout the polymer matrix, creating a composite that provides effective bacterial inhibition while maintaining 3D printing functionality.
Solution Approach 2:
The patent applies local quality by concentrating silver nanoparticles at specific locations within the 3D printed structure, particularly in areas prone to bacterial growth. This allows the antibacterial property to be localized where most needed, rather than uniformly distributed throughout the entire material.
2Reliability
If washing is used to sterilize 3D printed products, then the process is simple and accessible, but washing alone does not completely sterilize the surfaces and crevasses of these products
Solution Approach 1:
The patent applies preliminary action by incorporating antibacterial silver nanoparticles into the 3D printing material itself before the printing process. This proactive approach embeds sterilization capability directly into the material structure, eliminating the need for subsequent washing or separate sterilization steps.
Solution Approach 2:
The patent applies self-service by designing the 3D printed object to possess inherent antibacterial properties through the integrated silver nanoparticles. The material itself performs the sterilization function without requiring external intervention, washing, or additional processing steps.
3Reliability
If silver nanoparticles are added to polymer matrix, then antibacterial properties are achieved, but achieving stable and well-dispersed nanoparticle distribution is challenging
Solution Approach 1:
The patent applies intermediary by using sulfonated polyester as a mediating substance that facilitates the dispersion of silver nanoparticles. The sulfonated groups on the polyester matrix act as dispersing agents, preventing nanoparticle aggregation and ensuring stable distribution throughout the material.
Solution Approach 2:
The patent applies parameter changes by modifying the chemical properties of the polymer matrix through sulfonation. This chemical modification changes the surface characteristics and polarity of the matrix, enabling better compatibility and dispersion of the silver nanoparticles throughout the material.
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 sulfonated polyester-silver nanoparticle composite effectively inhibits bacterial growth, providing a stable and efficient antibacterial solution for 3D printing applications, ensuring the safety and longevity of printed products.
Implementation Method 1
a plurality of silver nanoparticles dispersed within the matrix
Implementation Method 2
the silver nanoparticle composite effectively inhibits bacterial growth, providing a stable and efficient antibacterial solution
Data Source
AI summary
A composite filament includes a sulfonated polyester matrix and a plurality of silver nanoparticles dispersed within the matrix and methods of making thereof. Various articles can be manufactured from such composite filaments.