OSTE+ Polymer Composite with Rare Earth Hard Magnetic Particles for Flexible Reaction Injection-Moldable Microfluidic Actuators
Bibliographic record
Abstract
We present a novel magnetic composite polymer (M-CP) that consists of off-thiol-ene-epoxy (OSTE+) polymer thermoplastic resin embedded (doped) with rare earth (hard) magnet particles, resulting in an M-CP that is flexible and capable of strong, bi-directional actuation. While previously shown for microfluidics, OSTE+ has not yet been embedded with functional (e.g., magnetic) particles. We demonstrate that a magnetic OSTE+ using a matrix polymer of OSTEMER 324 Flex embedded with 25% by weight rare earth ((Nd0.7Ce0.3)10.5Fe83.9B5.6) magnetic powder remains flexible after photopatterning, can be permanently magnetized, and retains a permanent magnetic field for at least 15 months. We develop a fabrication flow for this new material, as well as determine its ultraviolet (UV) curing times. Further development of magnetic OSTE+ could advance the integration of flexible M-CP microactuators into mass-manufacture, as OSTE+ integrates well with diverse substrates and can be tailored to have different ranges of Young's modulus, allowing for flexible actuators to be built into an otherwise rigid device.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".