Insulative · WS-INS-02 · v1.0.2
Insulative Panel – Moisture-resistant
Adds silane coupling agent to treat CNF and sawdust surfaces, reducing moisture uptake in high-humidity cavities. Pending fire retest before promotion to approved.
Candidate
Forked from WS-INS-01 v2.4.1
Batch size
900 g
Nominal
Total mass
946.0 g
Incl. finishing
Parts
2
A · B
Ingredients
11
Across all parts
Cost / batch
$6.68
All parts
Cost / kg
$7.06
Finished material
Measured performance
Aggregated across attached testsCompression
12.8 MPa
Water absorption
2.2%
UV (0–10)
6.1/10
Density
150 kg/m³
Ingredients
Organized by mixing part · mass% = share of total recipeA
Part A · Aqueous pre-mix
9 ingredients · 924.0 g · $6.32
| Ingredient | Material | Amount | Mass % | Purpose | Cost |
|---|---|---|---|---|---|
Oak sawdust | Sawdust | 290 g | 30.7% | Structural filler — fine grain | $0.203 |
Distilled Water | — | 280 g | 29.6% | Hydration and flow medium | $0.070 |
Citrate Buffer pH 4.5 (0.05M) | Additive | 20 g | 2.1% | Maintains optimal pH | $0.100 |
CaCO₃ (Calcium Carbonate) | Additive | 60 g | 6.3% | Stiffener and filler | $0.018 |
Sodium Alginate | Additive | 50 g | 5.3% | Natural gel binder for adhesion | $0.900 |
Glycerin | Additive | 28 g | 3.0% | Co-plasticizer, flow modifier | $0.070 |
Borriesperse (Lignosulfonate) | Lignin | 38 g | 4.0% | Water-dispersible binder | $0.057 |
CNF (Cellulose Nanofibers) | NC | 100 g | 10.6% | Reinforcement and cohesion | $4.80 |
Aluminum trihydroxide (ATH) | Additive | 58 g | 6.1% | Flame retardant and smoke suppressant | $0.104 |
B
Part B · Silane treatment + foam
2 ingredients · 22.0 g · $0.361
| Ingredient | Material | Amount | Mass % | Purpose | Cost |
|---|---|---|---|---|---|
Silane coupling agent (γ-MPS) | Additive | 12 g | 1.3% | Hydrophobic coupling of CNF and sawdust | $0.336 |
Hydrogen Peroxide (H₂O₂, 3%) | Additive | 10 g | 1.1% | Curing agent (via Fenton reaction) | $0.025 |
Mixing instructions
4 steps · total hands-on time 5 h 40 min- 1Aqueous pre-mix20 min35 °C
As INS-01 step 1.
- 2Silane pre-hydrolysis10 min
In a separate beaker, hydrolyze silane in 30g water at pH 4.5 for 10 min. Add to main slurry before sawdust.
- 3Slurry + foam10 min
As INS-01, but monitor — silane shortens pot life to ~20 min.
- 4Cast + cure5 h75 °C
As INS-01, but raise oven hold to 75°C / 5h.
Cost contribution by ingredient
Ranked high to low1.
CNF (Cellulose Nanofibers)
$4.80
71.8%
2.
Sodium Alginate
$0.900
13.5%
3.
Silane coupling agent (γ-MPS)
$0.336
5.0%
4.
Oak sawdust
$0.203
3.0%
5.
Aluminum trihydroxide (ATH)
$0.104
1.6%
6.
Citrate Buffer pH 4.5 (0.05M)
$0.100
1.5%
7.
Distilled Water
$0.070
1.0%
8.
Glycerin
$0.070
1.0%
9.
Borriesperse (Lignosulfonate)
$0.057
0.9%
10.
Hydrogen Peroxide (H₂O₂, 3%)
$0.025
0.4%
11.
CaCO₃ (Calcium Carbonate)
$0.018
0.3%
Batch economics
Total cost / batch$6.68
Finished mass946.0 g
Cost per kg$7.06
Priciest inputCNF (Cellulose Nanofibers)
Share of total from top 390%
Safety
- Silane is moisture-sensitive — open containers under dry N₂.
- Respiratory protection required during silane handling.
Batches mixed from this recipe
All batches →BAT-24-0419-022026-04-19 09:55 · 90 kg · J. Parkmixing
Attached tests
All tests →T-8818Flame spread indexClass Cfail