Flax, chopped · T. versicolor (FC)
✓ Reviewed content
Trametes versicolor (M9912-5LSR-2 O447A) · Vrije Universiteit Brussel (BE)
Recipe
How this sample was made, step by step · total growth 16 days-
1
Substrate
- 100 wt%
- Flax hurds, chopped (≤ 5 mm; Jopack bvba, Rumbeke (BE))
- Pre-treatment
- soaked in water for 24 h, rinsed, blended with water for 10 min (Emerio BL-108862), drained over a 5 mm sieve, dried at 30 °C for 24 h
-
2
Sterilisation
- Method
- Autoclaving
- Details
- 121 °C, 20 min (fibres only)
-
3
Inoculation
- Fungus
- Trametes versicolor · M9912-5LSR-2 O447A
- Inoculum
- Grain spawn
- Rate
- 50 wt%
- Water content
- 70 %
-
4
Growth in mould
8 days- Mould
- two-part PVC tube mould covered with perforated cellophane; grown in a filter micro box
- Temperature
- 28 °C
-
5
Post-growth
8 days- Where
- demoulded
-
6
Inactivation
- Method
- Oven drying
- Temperature
- 70 °C
-
7
Specimen & testing
- Geometry
- cylinder Ø 75 × 37.5 mm (compression), Ø 63 × 200 mm (λ), Ø 20 × 100 mm (water)
- Dry density
- 65.8 kg/m³
- Mass loss
- 81.2 %
- Shrinkage
- 13 %
- Measurements
- 5
Growth in mould 8 daysPost-growth 8 days
Steps marked “not reported” were not stated in the source. Suggest missing details
Flax hurds < 5 mm, chopped.
Measurements
Mechanical
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Compressive modulus | 1.18 MPa | 3 | ASTM D3501 (tangent modulus) | 25 °C / approx. 50 % RH 5 mm/min, test up to 70–80 % strain; mean value from text, scatter only in Fig. 4 |
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Physical properties
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Density | 65.8 ± 4.2 kg/m³ | 3 | ISO 9427:2003 | compression specimen |
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Moisture & water
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Capillary water absorption rate (sorptivity) | 0.0113 ± 0.002 mm/√s | 3 | ASTM C1585 (partial immersion), 20 °C | specimen Ø 20 × 100 mm, density 137.5 ± 2.9 kg/m³ |
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| Water absorption after 24 h (partial immersion) | 30.28 wt% | 3 | ASTM C1585 (partial immersion), 20 °C | edit |
Thermal
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Thermal conductivity λ | 0.0578 ± 0.002 W/(m·K) | 3 | ASTM D5334-00 (Hukseflux TP02 needle probe), with deviation in heating current | specimen Ø 63 × 200 mm, density 134.7 kg/m³ |
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Production
Substrate mix
Fungus & inoculation
- Fungus
- Trametes versicolor (M9912-5LSR-2 O447A)
- Inoculum type
- Grain spawn
- Inoculation rate [wt%]
- 50
- Water content at inoculation [%]
- 70
- Sterilisation
- Autoclaving
- Sterilisation – details
- 121 °C, 20 min (fibres only)
Growth
- Growth in mould [days]
- 8
- Post-growth after demoulding [days]
- 8
- Temperature [°C]
- 28
- Mould / mould material
- two-part PVC tube mould covered with perforated cellophane; grown in a filter micro box
Post-processing
- Inactivation
- Oven drying
- Inactivation – temperature [°C]
- 70
Specimen
- Specimen geometry
- cylinder Ø 75 × 37.5 mm (compression), Ø 63 × 200 mm (λ), Ø 20 × 100 mm (water)
- Dry density [kg/m³]
- 65.8
- Mass loss on drying [%]
- 81.2
- Shrinkage [%]
- 13
Notes
Recipe: 20 wt% fibres, 70 wt% sterile demineralised water, 10 wt% grain spawn; inoculation rate calculated from this (10/20). Filled into the mould in layers and compacted with a spoon. Demoulded after 8 days and grown for at least 8 more days without mould. Dried for 5–10 h until constant mass. Mass loss = initial moisture content per ISO 16979 (Table 2).
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