In Situ Thermal Condensation of Glucose-Diammonium Phosphate Inwood for Fire and Fungal Decay Protection


  • George Chen


Dehydration, diammonium phosphate, fire and fungal decay protection, glucose, thermal condensation, wood


Thermal condensation of glucose-diammonium phosphate in wood at 160 and 190°C will protect wood against fire and decay in one treatment using an aqueous system. For fire protection, treatments at 160 or 190°C led to low flammability as evidenced by fire-tube tests. For nonleached wood, weight losses were 1.9, 2.0, and 2.0% with chemical retentions of 56.7, 44.7, and 64.7%, respectively, for 2-, 4-, and 6-h heating; and for leached wood, weight losses of 5.1, 3.8, and 1.5% with chemical retentions of 24.5, 24.1, and 45.6%, respectively, for 2-, 4-, and 6-h heating compared with 18.8% weight loss for diammonium phosphate-treated wood with chemical retention of 19.4%. The control had 84.4% weight loss. For decay protection, heat treatment at 190°C for 30 min after 2-wk water leaching also prevents degradation by brown and white rot fungi. Weight loss by Gloeophyllum trabeum (Gt) was 0.4% with 19.5% chemical retention, and weight loss by Trametes versicolor (Tv) was 1.5% with 17.8% chemical retention. The control had 30.6 and 36.8% weight losses by Gt and Tv, respectively.


Arsenault R, Kressbach J, Fox R (1991) Laboratory and field evaluation of copper dimethyldithiocarbamate as a wood preservative. American Wood-Preservers' Association, Birmingham, AL. Pages 1 - 23.nASTM (2000) Standard method of testing wood preservatives by laboratory soil-block cultures. D143-99. American Society for Testing and Materials, West Conshohocken, PA.nASTM (2001) Standard test method for combustible properties of treated wood by the fire-tube apparatus. E69-99. American Society for Testing and Materials, West Conshohocken, PA.nAWPA (1993) Report of subcommittee P-7: Fire retardant systems. Pages 415 - 417 in Proc American Wood-Preservers' Association, Birmingham, AL.nBellamy LJ (1964) The infrared spectra of complex molecules. John Wiley & Sons, Inc., New York. Pages 343 - 349.nChen GC (2008a) Synthesis and evaluation of aminoborates derived from boric acid and diols for protecting wood against fungal and thermal degradation. Wood Fiber Sci 40(2):248 - 257.nChen GC (2008b) Synthesis and evaluation of phosphortriamidates in wood for thermal and fungal decay protection. Holzforschung 62:318 - 321.nColthup NB, Daley IH, Wiberley SE (1964) Chapter 2. Experimental considerations. Pages 37 - 97, Chapter 10. Ethers, alcohols, and phenols. Pages 269 - 277, Chapter 12. Compounds containing boron, silicone, phosphorus, sulfur, or halogen. Pages 291 - 318 in Introduction to infrared and raman spectroscopy. Academic Press, New York, NY.nDavis WH, Thompson WS (1964) Influence of thermal treatments of short duration on the toughness and chemical composition of wood. Forest Prod J 8:350 - 356.nEvan P (2003) Emerging technologies in wood protection. Forest Prod J 47:14 - 22.nFreeman MH, Kamdem P, Brient JA (2003) Water-born copper naphthanates: A chromium and arsenic free preservative for wood and composites in Proc American Wood-Preservers' Association. 99:194 - 211.nGezer ED, Yalinkilic MK, Kizilkaya K, Michael JH (1999) Estimation of preservative toxic threshold retention from laboratory decay tests: A new method. Wood Sci Technol 33:63 - 71.nGoodwine W (1990) Suitability of propiconazole as a new generation wood preserving fungicide. Pages 206 - 214 in Proc American Wood-Preservers' Association.nGreenley DE (1986) Laboratory and field evaluation of a substituted isothiazolone as a potential wood preservative. Pages 206 - 214 in Proc American Wood-Preservers' Association.nHakkou M, Petrissans M, Gerardin P, Zoulalian A (2006) Investigations of the reasons for fungal durability of heat-treated beech wood. Polym Degrad Stabil 91:393 - 397.nHergert HL, Kurth EF (1953) The infrared spectra of lignin and related compounds. I. Characteristic carbonyl and hydroxyl frequencies of some flavanones, flavones, charcones and acetophenones. J Am Chem Soc 75:1622 - 1625.nHoebel JF (1998) US consumer product safety commission activities related to polymer flammability. Pages 303 - 307 in Proc on Recent Advances in Flame Retardancy of Polymeric Materials.nJuneja SC (1972) Stable and leach-resistant fire retardants for wood. Forest Prod J 22(6):17 - 23.nHoebel JF, Richardson LR (1974) Versatile fire retardants from amino-resins. Forest Prod J 24(5):19 - 23.nJung M (2003) Copper HDO (Copper xyligen) in Proc American Wood-Preservers' Association 99:190 - 193.nKaur B, Gur IS, Bhatnagar (1986) Studies on thermal degradation of cellulose and cellulose phosphoramides. J Appl Polym Sci 31:667 - 683.nLee HL, Chen GC, Rowell RM (2004a) Thermal properties of wood reacted with a phosphorus pentaoxide-amine system. J Appl Polym Sci 91:2465 - 2481.nLee HL, Chen GC, Rowell RM (2004b) Fungal decay resistance of wood reacted with a phosphorus pentoxide-amine system. Holzforschung 58:311 - 315.nLeVan SL, DeGroot RC (1993) One step process for imparting resistance and fire retardancy to wood products. US Patent 5185214.nLeVan SL, Winandy JE (1990) Effect of fire retardant treatments on wood strength: A review. Wood Fiber Sci 22(1):113 - 131.nLyons WJ (1970) Mechanisms of fire retardation with phosphorus compounds: Some speculation. J Fire Flammability. 1:302 - 311.nMacLean JD (1955) Effect of oven heating and hot pressing on strength properties of wood in Proc American Wood-Preservers' Association 5:227 - 250.nMarchessault RH (1962) Application of infra-red spectroscopy to cellulose and wood polysaccharides. Pure Appl Chem 5:107 - 129.nNance WL, Amburgey TL (1976) Statistical analysis of data from laboratory decay tests. Pages 161 - 171 in Proc American Wood-Preservers' Association Annual Meeting, April 25 - 28, 1976, Atlanta, GA.nSarkanan KV, Chang HM, Ericksson B (1967) Species variation in lignins I. Infrared spectra of guaiacyl and syringyl models. TAPPI 50(11):572 - 575.nSeborg RM, Tarkow H, Stamm AJ (1953) Effect of heat upon the dimensional stabilization of wood. Forest Prod J 3(9):59 - 67.nSekiguch Y, Frye JS, Shafidadeh F (1983) Structure and formation of celluosic chars. J Appl Polym Sci 28:3513 - 3525.nShafizadeh F (1984) Pyrolysis and combustion. Pages 489 - 529 in Rowell RM, ed. The chemistry of solid wood. Advanced in chemistry series 207. American Chemical Society, Washington, DC.nStamm AJ, Baechler RH (1960) Durability and dimensional stability of five modified woods. Forest Prod J 1:22 - 26.nSteel RGD, Torrie JH (1960) Principles and procedures of statistics. Pages 332 - 345 in Non-linear regression analysis. (Steel and Torrie, eds). McGraw-Hill Book Company, Inc., New York, NY.nStofko J (1980) Bonding of solid lignocellulosic materials. US Patent 4183997.nSubramanian RV (1984) Bioactive wood-polymer composites. Pages 292 - 305 in Rowell RM, ed. The chemistry of solid wood. Advances in chemistry series 207. American Chemical Society, Washington, DC.nTjeerdsma BF, Boonstra M, Militz H (1998) Thermal modification of non-durable wood species. 2. Improved wood properties of thermally treated wood. International Research Group on Wood Preservation. IRG/MP 98-40124.nTjeerdsma BF, Stevens M, Boonstra M, Van Acker J (2002) Effect of process conditions on moisture content and decay resistance of hydro-thermally treated wood. Holzforsch Holzverw 53(5):94 - 99.nTrocino FS, Amundson FJ (1992) Fire-retardant chemical compositions. US Patent 5162394.nTroughton GE, Rozen LR (1974) Heat effects on tensile properties of Douglas-fir and white spruce thin section. Wood Sci 7(2):116 - 122.nWard HA (1990) Wood preservatives. US Patent 4950685.nWood T, Bell J (1990) In Proc Development of chlorothalonil as a wood preservative. American Wood-Preservers' Association. Pages 190 - 196.nZahbankov RG (1966) Infrared spectra of cellulose and it derivatives. Pages 97 - 102 in New types of cellulose derivatives: investigation of the new products of thermal decomposition of cellulose methylxanthate. Chapter VI. Stepanov BI (Ed.) Translated from Zhurnal Prikladnoi Spektroskopii 19(1):145 - 147. Consultants Bureau, New York, NY.n






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