Abstract
This study was conducted to improve the flame retardancy and smoke suppression of fast-growing Chinese fir (Cunninghamia lanceolate) wood by using magnesium silica gel to construct porous structure in the cell lumen. This method improved the fire retardancy of the wood, enhanced the mechanical properties of the wood in flames, and filtered toxic fumes to enhance the safety of buildings. Firstly, sodium silicate solution was used to impregnate the Chinese fir cell walls to enhance the mechanical strength. Then, sodium silicate and magnesium sulfate were compounded to become magnesium silica gel, which was crystallized in the cell lumen. In this way, magnesium silicate gel modified Chinese fir wood was prepared, and its heat and smoke suppression properties were tested. The pyrolyzed residual carbon mass of modified wood in nitrogen was 20% higher than that of the natural wood. A lower pyrolysis temperature reduced the yield of combustible volatile gases and halted the appearance of the violent combustion stage. The total heat release (THR) was reduced to 15 MJ/m2, reaching B1 level in the Chinese National Standard (flame-retardant material). It maintained its mechanical strength within 3 min during combustion and greatly improved its application safety. SEM images showed the pore structure of the filler in the cell lumen, which blocked heat conduction, slowed the spread of fire, and filtered and adsorbed toxic and harmful smoke when it passed through. In line with the results of CONE and TG-IR tests, the total smoke production (TSP) was reduced by 85% compared with natural wood, which greatly enhanced the application value of the modified wood.
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Data availability
Data availability: The data that support the findings of this study are available from the corresponding author Yingfeng Zuo upon reasonable request.
References
Bhatt PP, Kodur VKR, Shakya AM, Alkhrdaji T (2021) Performance of insulated FRP-strengthened concrete flexural members under fire conditions. Front Struct Civ Eng 15:177–193
Chen CJ, Kuang YD, Zhu SZ, Burgert I, Keplinger T, Gong A, Li T, Berglund L, Eichhorn SJ, Hu LB (2020) Structure–property–function relationships of natural and engineered wood. Nat Rev Mater 5:642–666
Gallego B, Verdú JR, Carrascal LM, Lobo JM (2016) A protocol for analysing thermal stress in insects using infrared thermography. J Therm Biol 56:113–121
Ghods B, Rezaei M, Meshkani F (2016) Synthesis of nanostructured magnesium silicate with high surface area and mesoporous structure. Ceram Int 42:6883–6890
Hull TR, Brein D, Stec AA (2016) Quantification of toxic hazard from fires in buildings. J Build Eng 8:313–318
Kong L, Guan H, Wang X (2018) In situ polymerization of furfuryl alcohol with ammonium dihydrogen phosphate in poplar wood for improved dimensional stability and flame retardancy. ACS Sustain Chem Eng 6:3349–3357
Kontogeorgos DA, Semitelos GK, Mandilaras ID, Caps R, Founti MA (2017) Experimental determination of the effective thermal conductivity of vacuum insulation panels at fire temperatures. Fire Mater 41:738–749
Krišťák L, Réh R (2021) Application of wood composites. Appl Sci 11(8):3479
Li P, Zhang Y, Zuo YF, Lu JX, Yuan GM, Wu YQ (2020) Preparation and characterization of sodium silicate impregnated chinese fir wood with high strength, water resistance, flame retardant and smoke suppression. J Mater Res Technol 9:1043–1053
Li P, Zhang Y, Zuo YF, Wu YQ, Yuan GM, Lu JX (2021) Comparison of silicate impregnation methods to reinforce chinese fir wood. Holzforschung 75:126–137
Lin CF, Karlsson O, Martinka J, Rantuch P, Garskaite E, Mantanis GI, Jones D, Sandberg D (2021) Approaching highly leaching-resistant fire-retardant wood by in situ polymerization with melamine formaldehyde resin. ACS Omega 6:12733–12745
Ma XX, Kirker GT, Jiang ML, Wu YZ (2016) Dual protection of wood surface treated with melamine-modified urea-formaldehyde resin mixed with ammonium polyphosphate against both fire and decay. For Prod J 66:280–283
Mai C, Schmitt U, Niemz P (2022) A brief overview on the development of wood research. Holzforschung 76:102–119
Ministry of Public Security of the PRC (2012) Classification for burning behavior of building materials and products, GB 8624 – 2012. Standardization Administration, Beijing
Odeen K (1985) Fire resistance of wood structures. Fire Technol 21:34–40
Rabajczyk A, Zielecka M, Małozi D (2020) Hazards resulting from the burning wood impregnated with selected chemical compounds. Appl Sci 10:6093
Segal L, Creely JJ, Martin AE, Conrad CM (1959) An empirical method for estimating the degree of crystallinity of native cellulose using the X-ray diffractometer. Text Res J 29:786–794
Sun Z, Srinivasakannan C, Liang J, Duan X (2019) Preparation of hierarchical magnesium silicate with excellent adsorption capacity. Ceram Int 45:4590–4595
Sun Z, Liu Y, Hong W (2020) Facile synthesis of porous hydrated magnesium silicate adsorbent from ordinary silica gel. Mater Lett 272:127886
Sykam K, Försth M, Sas G, Restas A, Das O (2021) Phytic acid: a bio-based flame retardant for cotton and wool fabrics. Ind Crops Prod 164:113349
Wang LY, Yang YB, Deng HB, Duan WY, Zhu JJ, Wei Y, Li W (2021) Flame retardant properties of a guanidine phosphate-zinc borate composite flame retardant on wood. ACS Omega 6:11015–11024
Wang KH, Meng D, Wang SH, Sun J, Li HF, Gu XY, Zhang S (2022a) Impregnation of phytic acid into the delignified wood to realize excellent flame retardant. Ind Crops Prod 176:114364
Wang S, Kong DZ, Chen HF, Wang Z, Lu Z (2022b) Construction of a novel B/N/Si synergistic flame retardant system and its application on cotton fabric. Ind Crops Prod 178:114574
Yona AMC, Žigon J, Matjaž P, Petrič M (2021) Potentials of silicate-based formulations for wood protection and improvement of mechanical properties: a review. Wood Sci Technol 55(4):887–918
Zhang Y, Bi XQ, Li P, Wu YQ, Yuan GM, Li XJ, Zuo YF (2021) Sodium silicate/magnesium chloride compound-modified chinese fir wood. Wood Sci Technol 55:1781–1794
Zhang LL, Zhang WL, Peng Y, Wang W, Cao JZ (2022) Thermal behavior and flame retardancy of poplar wood impregnated with furfuryl alcohol catalyzed by boron/phosphorus compound system. Ind Crops Prod 176:114361
Zhou Y, Zhang Y, Zuo YF, Wu YQ, Yuan GM, Li XJ (2020) Construction of a network structure in chinese fir wood by Na2SiF6 crosslinked Na2SiO3. J Mater Res Technol 9:14190–14199
Zhu CK, Li SH, Li JJ, Clement M, Rudd C, Yi XS, Liu XL (2020) Fie performance of sandwich composites with intumescent mat protection: evolving thermal insulation, post-fire performance and rail industry testing. Fire Saf J 116:103205
Acknowledgements
This research was supported by the Scientific Research Project of Hunan Provincial Education Department, PR China (22A0177, 21B0238), Hunan Provincial Technical Innovation Platform and Talent Program in Science and Technology, PR China (2019RS2040) and National Natural Science Foundation of China (32201485, 32171708).
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Zhang, Y., Bi, X., Zuo, Y. et al. Magnesium silica gel crystallized in the cell lumen of Chinese fir to construct porous structure for filtering toxic fumes. Eur. J. Wood Prod. 81, 987–997 (2023). https://doi.org/10.1007/s00107-023-01931-w
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DOI: https://doi.org/10.1007/s00107-023-01931-w