Self-Healing Functional Ink for 3D Printing
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Solution Overview
Problem
Existing 3D printing technologies face challenges in preparing conductive inks with uniform composition and stable dispersion at high concentrations, resulting in poor functional performance and rapid decay of device performance due to interfacial resistance between layers.
Innovation Solution
A functional ink formulation comprising a regulator for reversible dynamic interactions, a conductive material, a crosslinking agent, and a catalyst, along with optional functional nanomaterials, which enables self-healing and improved mechanical coalescence between layers, using components like chitosan, graphene, and polymaleic acid, and a solvent, mixed and stirred under specific conditions for 3D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentration conductive ink is prepared, then conductivity is improved, but uniform composition and stable dispersion become difficult to achieve
Solution Approach 1:
The patent introduces a regulator as an intermediary substance that mediates between conductive materials and the solvent system. This regulator maintains stable dispersion and uniform composition even at high conductive material concentrations, resolving the contradiction between achieving high conductivity and maintaining compositional stability.
Solution Approach 2:
The patent optimizes multiple parameters including the concentration ratio of conductive material to regulator, molecular weight and structure of the regulator, pH value, and solvent composition. By systematically adjusting these parameters, the ink achieves both high conductivity and stable dispersion uniformity simultaneously.
2Shape
If layer-by-layer printing is performed, then complex 3D structures are achieved, but interfacial resistance increases and device performance decays
Solution Approach 1:
The regulator acts as a molecular intermediary at the interfaces between printed layers. It promotes strong interfacial adhesion and reduces interfacial resistance, ensuring that the electrical and functional performance remains stable even as multiple layers are stacked to form complex 3D structures.
Solution Approach 2:
The ink formulation is designed with preliminary self-healing capabilities and interfacial optimization properties before printing. The regulator pre-establishes favorable interfacial conditions that prevent performance decay during the layer-by-layer printing process, rather than attempting to correct issues after printing.
3Adaptability or versatility
If functional ink is developed for 3D printing, then functional device manufacturing is enabled, but self-healing capability and interlayer coalescence are insufficient
Solution Approach 1:
The patent carefully controls the molecular weight, functional group composition, and concentration of the regulator to optimize both the self-healing capability and mechanical coalescence strength. By adjusting these parameters, the ink achieves adequate interlayer bonding strength while maintaining the versatility needed for various functional device applications.
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 ink exhibits excellent self-healing and enhanced electrical, magnetic, and electrochemical properties, maintaining performance across multiple layers with reduced interfacial resistance, suitable for applications in energy storage, electromagnetic shielding, and stress sensing.
Implementation Method 1
The regulator provides a reversible dynamic intermolecular interaction or a reversible dynamic intramolecular interaction at room temperature. The reversible dynamic interaction is realized by reversible dynamic bonds, and the reversible dynamic bonds are covalent bonds, hydrogen bonds or ion coordination bonds.
Implementation Method 2
0.1-0.5 parts of a crosslinking agent, 0.1-0.5 parts of a catalyst
Data Source
AI summary
A functional ink suitable for 3D printing and a preparation method thereof are provided. The ink includes the following components in parts by weight: 0.5-1.5 parts of a regulator, 1-5 parts of a conductive material, 0.1-0.5 parts of a crosslinking agent, 0.1-0.5 parts of a catalyst, and 10-80 parts of a solvent. The prepared functional ink has a self-healing function at room temperature, eliminating the interface resistance between printing layers and improving the mechanical strength between the layers. Moreover, the prepared functional ink has excellent electrical conductivity and a variety of electrical, magnetic, and electrochemical properties, and can be applied in the fields of functional materials and devices such as energy storage, electromagnetic shielding and stress sensing.