Radiation-Curable Resin Composition for 3D Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radiation-curable resins for 3D printing lack suitable compositions that balance mechanical properties, accuracy, and speed for stereolithography, particularly in dental applications, where existing formulations often rely on free-radical photoinitiators and do not adequately utilize graphene and halloysite nanotubes for enhanced performance.
Innovation Solution
A novel radiation-curable resin composition combining epoxy-acrylic resins, graphene, halloysite nanotubes, and photoinitiators, optimized with specific weight percentages to enhance mechanical properties, including the use of graphene or functionalized graphene and halloysite nanotubes for improved reinforcement and adhesion, which is suitable for 3D printing and stereolithography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional radiation-curable resins are used for 3D printing, then the printing process can be completed, but the mechanical properties and dimensional stability of the printed objects are insufficient
Solution Approach 1:
The patent employs a composite resin system combining epoxy-acrylic resins with polymethyl methacrylate, graphene, and halloysite nanotubes. This multi-component composite approach creates synergistic effects where the epoxy-acrylic provides mechanical strength and the nanotubes enhance dimensional stability, resolving the contradiction between strength and reliability.
Solution Approach 2:
The patent modifies the chemical composition parameters of the resin by incorporating specific ratios of epoxy-acrylic resin (40-80 wt%), polymethyl methacrylate (5-30 wt%), graphene (0.1-5 wt%), and halloysite nanotubes (0.1-5 wt%). These parameter changes optimize both mechanical properties and dimensional stability simultaneously.
2Productivity
If free-radical photoinitiators are used in the resin composition, then the curing speed is improved, but the accuracy and mechanical properties deteriorate
Solution Approach 1:
The patent changes the photoinitiator system from conventional free-radical types to a cationic photoinitiator system (0.1-10 wt%). This parameter change in the chemical mechanism enables controlled curing that maintains both speed and precision, as cationic polymerization proceeds more uniformly without the rapid exothermic reactions that compromise accuracy.
3Strength
If graphene and halloysite nanotubes are added to enhance mechanical properties, then tensile strength and hardness improve, but the resin composition complexity increases
Solution Approach 1:
The patent integrates graphene (0.1-5 wt%) and halloysite nanotubes (0.1-5 wt%) as reinforcing fillers within the epoxy-acrylic resin matrix. This composite structure provides enhanced tensile strength and hardness while the controlled low concentrations minimize processing complexity. The nanotubes serve dual functions as both reinforcement and potential catalyst carriers.
Solution Approach 2:
The patent applies nanoreinforcements locally within the resin matrix rather than uniformly distributing all components. The graphene and halloysite nanotubes are strategically incorporated to provide localized strength enhancement where needed, allowing the bulk resin to maintain simpler composition and easier processing characteristics.
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 composition achieves significant improvements in tensile strength, impact resistance, elongation at break, and dimensional stability, with increased Young's modulus and hardness, while minimizing warping and offering superior optical and antibacterial properties, making it suitable for high-definition dental and biomedical applications.
Implementation Method 1
radiation curable resin composition... one or more photoinitiators... photopolymerizable either cationically or with free radicals
Data Source
AI summary
A radiation-curable resin composition, suitable for use in 3D printing, and to the production method thereof, i.e. the method for producing three-dimensional objects using radiation by means of 3D printing of the laser, DLP or LCD type, with successive photopolymerisable layers. The radiation-curable resin composition comprises one or more epoxy-acrylic resins and polymethyl methacrylate, graphene, halloysite nanotubes and one or more photoinitiators.