Microfluidic Printheads for Highly Switchable Multimaterial 3D Printing of Soft Materials
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract Extrusion‐based 3D printing uses multiple printing nozzles to produce multimaterial combinations. It requires complex alignment and accuracy control as well as an effective start‐stop procedure to print intermittently, which has so far proven difficult to achieve. A recently developed simpler approach is to sequence the multimaterial inks through a single nozzle that will avoid both of these requirements. Although it has been successfully demonstrated for viscoelastic inks, adapting it to more widely available viscous inks is still a challenge. Here, a dynamically controllable multimaterial single‐nozzle 3D printing printhead is demonstrated that is capable of printing both viscous and viscoelastic materials. It uses pneumatically pulsed injection of multiple viscous inks into a central nozzle for printing. It is shown through simulations and experiments that a crucial but narrow range active reverse pressure in static reservoir(s) is essential to provide accurate switching in viscous inks, which is unlike viscoelastic inks that have a wider operating range and do not require a backflow control. Using this approach, high frequency and fast switching between four different viscous materials for pixelated printing of different materials which can be used to embed different functional properties in a variety of 2D and 3D shapes using commercially available polymers are demonstrated.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it