Hydrogel Composition Viscosity Stability Diamine
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Solution Overview
Problem
Hydrogel solid freeform fabrication compositions face challenges with viscosity changes over time, making it difficult to stably and repeatedly fabricate objects with target properties and forms, and resulting in insufficient hardness in the final products.
Innovation Solution
A composition containing water, a water-soluble monomer with a polyethylene glycol structure, a mineral, and a diamine compound, where the diamine compound is present in a proportion of 7.0 to 20.0 percent by mass, is used to maintain viscosity stability and enhance the hardness of hydrogel objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional hydrogel compositions are used for solid freeform fabrication, then the hydrogel can reproduce soft tactile properties similar to human tissue, but the viscosity of the composition changes over time making it difficult to stably and repeatedly fabricate objects with target properties
Solution Approach 1:
The patent modifies the chemical composition parameters of the hydrogel system by introducing a diamine compound at a specific proportion (7.0 to 20.0 percent by mass relative to the water-soluble monomer). This parameter change stabilizes the viscosity of the composition over time, preventing the viscosity changes that occur with conventional hydrogel compositions, thereby enabling stable and repeated fabrication of objects with consistent target properties
Solution Approach 2:
The patent creates a composite hydrogel system combining water-soluble monomers with polyethylene glycol structures and diamine compounds. This composite material approach allows the system to maintain both the desired tactile properties of hydrogels and improved viscosity stability, resolving the contradiction between softness and fabrication reliability
2Strength
If conventional hydrogel materials are used, then the material can provide soft tactile properties close to human tissue, but the hardness of the fabricated objects is insufficient for medical model applications
Solution Approach 1:
The patent adjusts the chemical composition parameters by incorporating diamine compounds at controlled proportions (7.0 to 20.0 percent by mass). This parameter modification enhances the hardness of the fabricated hydrogel objects while maintaining the water content and tactile properties necessary for medical model applications, thus resolving the contradiction between hardness and tactile realism
3Adaptability or versatility
If multiple types of materials are combined to satisfy various medical model purposes, then different properties can be achieved, but the complexity of material selection and composition control increases
Solution Approach 1:
The patent develops a universal hydrogel composition system based on water-soluble monomers with polyethylene glycol structures and diamine compounds that can serve multiple medical model applications. This multi-functional system allows customization of properties through simple proportion adjustments rather than requiring entirely different material combinations, thereby reducing material selection and composition control complexity while maintaining versatility
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 prevents viscosity changes over time, allowing for the stable fabrication of hydrogel objects with high hardness and consistent properties, suitable for medical models that require specific tactile properties.
Implementation Method 1
a composition containing water, a water-soluble monomer with a polyethylene glycol structure, a mineral, and a diamine compound
Implementation Method 2
a water-soluble monomer with a polyethylene glycol structure
Data Source
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AI summary
A composition for hydrogel solid freeform fabrication contains water, a water-soluble monomer containing at least one polyfunctional monomer having a polyethylene glycol structure, a mineral, and a diamine compound, wherein the proportion of the diamine compound to the mineral is from 7.0 to 20.0 percent by mass.