Microfluidic Particle Synthesis for Additive Manufacturing
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Solution Overview
Problem
Current particle projection systems for additive manufacturing and printed components face challenges such as complex ink formulation, significant solvent use, particle sedimentation, and powder dissemination leading to material loss, health risks, and equipment fouling, which are not adequately addressed by existing solutions.
Innovation Solution
A system integrating a microfluidic reactor for in-situ particle synthesis and a dispensing device that eliminates the need for pre-produced ink and bulky storage, allowing continuous on-demand production of particles directly on the substrate, reducing solvent use and minimizing powder handling risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If particles are pre-produced and stored in cartridges, then the printing system can operate, but the particles sediment over time and require complex ink formulation
Solution Approach 1:
The system performs preliminary particle synthesis by integrating a microfluidic reactor that produces particles on-demand before deposition, eliminating the need for pre-formulated ink cartridges and avoiding sedimentation issues entirely
Solution Approach 2:
The invention extracts the particle synthesis step from the traditional ink formulation process, separating particle production from particle deposition by using a dedicated microfluidic reactor integrated into the printing system
2Stability of the object's composition
If complex ink formulation is used to maintain particle suspension, then particles remain suspended, but the process becomes bulky and requires significant storage and packaging
Solution Approach 1:
The invention removes the complex ink formulation step entirely by extracting particle synthesis to a separate microfluidic reactor that generates particles on-demand, eliminating solvents, polymers, and additives
Solution Approach 2:
The printing system performs its own particle synthesis through an integrated microfluidic reactor, making the system self-sufficient and eliminating the need for externally formulated ink cartridges
3Productivity
If powder is handled and loaded into the system, then the printing process can proceed, but powder dissemination causes material loss and health risks
Solution Approach 1:
The invention replaces mechanical powder handling with a fluid-based microfluidic synthesis system that generates particles in liquid suspension and delivers them through controlled fluid flow, eliminating dust generation entirely
Solution Approach 2:
The microfluidic reactor acts as an intermediary that converts liquid reagents into particles on-demand within a closed system, preventing direct contact with atmospheric powder and eliminating dissemination risks
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
This approach simplifies the particle production process, reduces ecological impact, minimizes material loss and health risks, and enables safe handling by synthesizing particles directly within the projection system, specifically suitable for reactive compounds like metallic nanoparticles.
Implementation Method 1
a reactor (2) for the production of the particles (P) to be sprayed, in particular by acting on liquid reagents (R1, R2)
Implementation Method 2
a heating zone (16), this heating zone (16) making it possible to heat the reaction mixture
Implementation Method 3
a dispensing device (21) for the spraying of the particles (P) produced by the reactor (2) onto a substrate (22)
Implementation Method 4
means for sintering the particles (P) after their deposition on the substrate (22)
Data Source
Figure 1~2
Figure 3a~3c
Figure 4~5
AI summary
The invention relates to a system (1) for spraying particles (P) onto a substrate (22), comprising: at least one reactor (2) comprising at least one inlet for liquid reagents (R1, R2), a reaction zone (14), and a zone (18) for the collection of the particles (P) produced from the liquid reagents in the reaction zone; a dispensing device (21) allowing the particles (P) to be sprayed onto the substrate (22); and means (26) for guiding the particles (P) from the collection zone (18) towards said dispensing device (21).