Coassembling Hydroxypropyl Cellulose into a Chiral Nematic Composite and Patternization with a Photomask and Direct Ink Writing
Bibliographic record
Abstract
Additive manufacturing (AM) is a next-generation technique for engineering hierarchically structured materials. The development of sustainable ink materials for AM is imperative. In this work, we explored hydroxypropyl cellulose (HPC) as a sustainable photonic ink for patterning by photomask and direct ink writing techniques. Specifically, we comprehensively investigated the coassembly behavior of HPC with a guest monomer into a chiral nematic structure and the parameters that affect the transition from a solution to composite film of HPC/monomer. The results reveal that the HPC/monomer has the ability to form a chiral nematic structure, and such a hierarchical structure can reflect light with a specific wavelength. The helical pitch in the chiral nematic structure, corresponding to the reflected wavelength, can be modulated via HPC concentration, the addition amount of monomer, cross-linking time, and drying temperature. Additionally, the composite exhibits robust mechanical properties and is capable of tolerating a wet environment (both high relative humidity and water). This comprehensive study is a fascinating example of using a sustainable cellulose derivative as a 3D printing ink and provides powerful support for the development of structural color materials.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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".