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Fluid Gels: a New Feedstock for High Viscosity Jetting
Sonia Holland1,2, Chris Tuck2, Tim Foster1
11Division of Food Science, Sutton Bonington Campus, University of Nottingham, Loughborough, LE12 5RD UK.
Food Biophysics
|May 15, 2018
Summary
Researchers developed novel fluid gels using sheared agar, creating pourable suspensions. These thermoreversible fluid gels can be 3D printed with controllable nozzle temperatures, enabling unique textured structures.
Area of Science:
- Materials Science
- Biopolymer Engineering
- Rheology
Background:
- Fluid gels are pourable suspensions formed by shearing gelling biopolymers during gelation.
- Agar fluid gels are thermoreversible, allowing controlled melting and re-gelation.
- High viscosity materials pose challenges for 3D printing.
Purpose of the Study:
- To apply thermoreversible agar fluid gels to a high-viscosity 3D printing process.
- To investigate the effect of controllable nozzle temperature on printed fluid gel structures.
- To explore the creation of 3D printed materials with modulated textures.
Main Methods:
- Shearing agar biopolymers during thermal gelation to create fluid gels.
- Utilizing a 3D printing process with a controllable nozzle temperature.
- Varying the nozzle temperature during printing to alter droplet internal structure and gel strength.
Main Results:
- Successfully applied agar fluid gels to a high-viscosity 3D printing process.
- Demonstrated that nozzle temperature controls the internal nature (gel particles) and gel strength of printed droplets.
- Showcased the potential to create 3D structures with modulated textures by adjusting printing temperature per layer.
Conclusions:
- Thermoreversible fluid gels offer a novel approach for 3D printing high-viscosity materials.
- Controllable nozzle temperature in 3D printing enables precise modulation of material properties and texture.
- This technique opens possibilities for creating complex, architected materials with tailored properties.
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