Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 5, Pages 5427-5434Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b19967
Keywords
fire resistant wood; mineralization; struvite mineral; X-ray tomography; lattice Boltzmann
Funding
- Climate-KIC
- BTA Urban transition demonstrator project
- Innosuisse [28473.1 PFIW-1W]
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High-performance wood materials have attracted significant attention in recent years because of excellent property profiles achieved by relatively easy top down processing of a renewable resource. A crucial flaw of the renewable wood scaffolds is the low flame retardancy, which we tackled by bioinspired mineralization in an eco-friendly processing step. The formation of the biomineral struvite, commonly found in urinary tract stones, was used for the infiltration of hierarchical wood structures with the necessary ions followed by an in situ synthesis of struvite by ammonium steam fumigation. Struvite decomposes prior to wood, which absorbs heat and releases nonflammable gas and amorphous MgHPO4 resulting from the degradation, which promotes insulating char formation. As a result, the mineralized wood can hardly be ignited and the treatment strongly suppresses the heat release rate and smoke production.
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