The biomass based flame retardant additive was prepared derived from renewable chitosan, melamine formaldehyde resin coated ammonium polyphosphate and organic montmorillonite and then incorporated into waterborne epoxy resin (WBEP) to produce waterborne fire-retardant coatings. Finally, the coating was used to prepare flame retardant wood composites by spraying the mixture on wood surface. The coated wood composites passed UL-94 V-0 rating during vertical burning tests and its limiting oxygen index value reached 31.8% when the loading amount of flame retardant additive was 18 wt% in coating and the coating thickness was 3 mm. After water resistance tests, the wood composites remained excellent flame retarded performance. The introduction of biomass based flame retardant enhanced the carbonization capability of coating, and the residual char reached 23.9 wt% at 800°C. The cone calorimeter tests revealed that the release of heat and smoke of the coated wood composites were obviously decreased and the expanded, integrated and sealed char layer was generated at the end of combustion. The formed char layer exhibited excellent isolation effect and the wood substrate was effectively protected from combustion, and the flame retardant performance of the coated wood composites was enhanced. Thus, the prepared flame retardant WBEP coating possessed good water resistance and flame retardant efficiency for wood substrate, and it had excellent application aspect for preparing flame retardant wood composites with good comprehensive performance.

中文翻译：

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生物质基水性防火涂料对木材阻燃性能的影响

以可再生壳聚糖、三聚氰胺甲醛树脂包覆聚磷酸铵和有机蒙脱石为原料制备生物质基阻燃添加剂，然后将其掺入水性环氧树脂（WBEP）中制备水性阻燃涂料。最后，通过将混合物喷涂在木材表面，将该涂料用于制备阻燃木材复合材料。涂层木复合材料在垂直燃烧试验中通过了UL-94 V-0等级，当阻燃添加剂在涂层中的加入量为18 wt%，涂层厚度为3 mm时，其极限氧指数值达到31.8%。经过耐水性测试，木质复合材料仍保持优异的阻燃性能。生物质基阻燃剂的引入增强了涂料的碳化能力，在 800°C 时残留炭达到 23.9 wt%。锥形量热仪测试表明，涂层木复合材料的热量和烟雾释放明显减少，并在燃烧结束时产生膨胀、集成和密封的炭层。形成的炭层表现出优异的隔离效果，有效地保护了木质基材免受燃烧，增强了涂层木质复合材料的阻燃性能。因此，所制备的阻燃WBEP涂料对木质基材具有良好的耐水性和阻燃效率，在制备具有良好综合性能的阻燃木质复合材料方面具有良好的应用前景。锥形量热仪测试表明，涂层木复合材料的热量和烟雾释放明显减少，并在燃烧结束时产生膨胀、集成和密封的炭层。形成的炭层表现出优异的隔离效果，有效地保护了木质基材免受燃烧，增强了涂层木质复合材料的阻燃性能。因此，所制备的阻燃WBEP涂料对木质基材具有良好的耐水性和阻燃效率，在制备具有良好综合性能的阻燃木质复合材料方面具有良好的应用前景。锥形量热仪测试表明，涂层木复合材料的热量和烟雾释放明显减少，并在燃烧结束时产生膨胀、集成和密封的炭层。形成的炭层表现出优异的隔离效果，有效地保护了木质基材免受燃烧，增强了涂层木质复合材料的阻燃性能。因此，所制备的阻燃WBEP涂料对木质基材具有良好的耐水性和阻燃效率，在制备具有良好综合性能的阻燃木质复合材料方面具有良好的应用前景。形成的炭层表现出优异的隔离效果，有效地保护了木质基材免受燃烧，增强了涂层木质复合材料的阻燃性能。因此，所制备的阻燃WBEP涂料对木质基材具有良好的耐水性和阻燃效率，在制备具有良好综合性能的阻燃木质复合材料方面具有良好的应用前景。形成的炭层表现出优异的隔离效果，有效地保护了木质基材免受燃烧，增强了涂层木质复合材料的阻燃性能。因此，所制备的阻燃WBEP涂料对木质基材具有良好的耐水性和阻燃效率，在制备具有良好综合性能的阻燃木质复合材料方面具有良好的应用前景。