Hierarchically porous coaxial wet-spun cellulose/polyurethane based hexamethylene diisocyanate (PUH) solid-solid phase change fiber for enhanced thermal management
Bibliographic record
Abstract
In the present study, we innovatively construct a porous sponge-like solid-solid phase change fiber (SSPCF) based on one-pot coaxial wet spinning process. For the core-sheath SSPCF, cellulose serves as the sheath precursor, while an isocyanate modified polyethylene glycol (PEG), namely polyurethane-based hexamethylene diisocyanate (PUH), acts as the core solid-solid phase change material (SSPCM). Upon the non-solvent induced phase separation (NIPS) during the wet spinning, the unique SSPCF with thin and dense sheath yet thick and porous sponge-like core were successfully fabricated, and they exhibited excellent slow heat release, high-temperature thermal protection. It is hypothesized that the porous structure within the fiber core primarily accounts for the superior temperature control heat release behavior and thermal insulation capability. Additionally, the prepared SSPCFs demonstrate high phase change enthalpy (105.26 J/g), high strength (10.38 MPa), excellent leak-proof and cyclic stability. Compared to solid-liquid phase change fibers (enthalpy: 110.7 J/g) and commercial polyethylene terephthalate (PET) fibers, the thermal response time (900 s) of the SSPCFs is extended by 300 s and 755 s, while their heat release time (450 s) is increased by 127 and 347 s, respectively. This research provides inspiration for the development of high-temperature insulation and slow heat release functional fibers and fabrics.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".