Conductive Composite Resin for 3D Printing
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Solution Overview
Problem
Existing photocurable 3D printing technologies face challenges with limited printing quality due to fillers added for specific properties, which decrease resin flowability and crosslinking density, making it difficult to achieve both electrical and mechanical properties suitable for applications like electronic parts and sensors.
Innovation Solution
A conductive composite resin composition for photocurable 3D printing is developed, incorporating 10-90 wt% of a photoreactive viscosity decreasing agent and 10-90 wt% of a photocurable resin, along with 0.01-1 wt% of conductive nanostructures, ensuring a viscosity of 400 cP or less for improved printing quality without the need for volatile organic solvents or post-processing like high-temperature heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filler is added to provide particular properties to printed material, then electrical and mechanical properties are improved, but resin flowability decreases interfering smooth 3D printing
Solution Approach 1:
The patent changes the chemical composition parameters of the resin system by incorporating photoreactive viscosity decreasing agents (10-90 wt%) alongside photocurable resins and conductive nanostructures (0.01-1 wt%). This parameter modification enables the resin to achieve both low viscosity for good flowability and sufficient crosslinking density for electrical and mechanical properties after photocuring.
Solution Approach 2:
The patent creates a composite resin composition comprising multiple components: photocurable resin, photoreactive viscosity decreasing agent, and conductive nanostructures. This composite system combines the benefits of each component - the photocurable resin provides crosslinking capability, the viscosity decreasing agent ensures flowability, and the conductive nanostructures provide electrical properties, resolving the contradiction between these competing requirements.
2Reliability
If filler content increases, then electrical and mechanical properties are enhanced, but crosslinking density of polymer matrix decreases during printing
Solution Approach 1:
The photoreactive viscosity decreasing agent acts as an intermediary component that mediates between the filler content and crosslinking density. It allows the system to accommodate higher filler content (0.01-1 wt% conductive nanostructures) while maintaining adequate crosslinking density through its own photoreactive properties and viscosity modification effects.
Solution Approach 2:
The patent modifies the chemical composition parameters by introducing photoreactive viscosity decreasing agents in specific quantities (10-90 wt%) that can adjust the balance between filler content and crosslinking density. This enables the system to achieve desired electrical and mechanical properties without sacrificing crosslinking density.
3Productivity
If conventional photocurable 3D printing is used, then manufacturing speed is high, but printing quality is limited due to decreased resin flowability
Solution Approach 1:
The patent changes the viscosity parameter of the resin composition by incorporating photoreactive viscosity decreasing agents (10-90 wt%). This parameter change improves resin flowability and printing quality while maintaining the rapid photocuring characteristics that enable high manufacturing speed in vat photo polymerization processes.
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 enables the production of 3D printed materials with tunable electrical conductivity and mechanical properties, achieving high resolution and printing speed, and is suitable for various industrial applications without the need for additional processing steps.
Implementation Method 1
photoreactive viscosity decreasing agent
Implementation Method 2
selective photo-crosslinking
Implementation Method 3
conductive nanostructures
Data Source
AI summary
Provided are a conductive composite resin composition for photocurable 3D printing and a preparation method thereof. The conductive composite resin composition for photocurable three-dimensional (3D) printing includes 10 to 90 wt % of a photoreactive viscosity decreasing agent and 10 to 90 wt % of a photocurable resin based on 100 wt % of the conductive composite resin composition, wherein the conductive composite resin composition further comprises 0.01 to 1 wt % of conductive nanostructures, and the conductive composite resin composition has a viscosity of 400 cP or less at a shear rate of 58 s−1.