Controlling the Morphology of Methylsilsesquioxane Monoliths Using a Two-Step Processing Method
Bibliographic record
Abstract
A new method for fabricating methylsilsesquioxane (MSQ) materials with similar chemical composition yet easily tailored pore morphology is described. MSQ materials were formed using an acid/base two-step processing method (B2). By varying the duration of the initial acidic step, it is possible to control the size and distribution of the clusters resulting from the polymerization of methtrimethoxysilane, which affect the gelation and phase separation time in the second basic step. As a result, the microstructure of the resultant MSQ monoliths, including pore volume, pore size, and distribution of meso- and macropores, can be varied over a wide range. The origin of this phenomenon is discussed based on the sol−gel polymerization kinetics and growth models for MSQ materials. Macroporous materials show minimal shrinkage, allowing for the fabrication of monolithic columns in a 100 μm fused silica capillary with no pullaway, and indicating the potential of this highly stable material as a new chromatographic stationary phase.
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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 | 0.001 |
| 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".