The improving effects of addition of nano‐wollastonite on some fire properties of medium‐density fiberboard (MDF) were studied in this work. Nano‐wollastonite was added at four levels (2%, 4%, 6%, and 8%). The size range of at least 70% of nano‐wollastonite particles were 30 to 110 nm. The results showed statistically significant improving effect of nano‐wollastonite on time to onset of ignition. The improving effect was primarily attributed to an increase in thermal conductivity of board containing nano‐wollastonite. This increase in turn resulted in better curing of resin, and a higher integrity of fibers thereof. Moreover, nano‐particles provided a surface with reduced combustibility and therefore, penetration of fire to the inner layers of boards was delayed, thus improving fire properties. High and significant correlations were found between thermal conductivity coefficients of boards with different fire properties. It was concluded that for applications where fire properties are of prime importance, nano‐wollastonite content of 8% can be recommended. Moreover, further studies are needed to compare and standardize the results obtained from the apparatus used here with those obtained from internationally recognized apparatuses like cone calorimeter.

中文翻译：

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纳米硅灰石提高中密度纤维板的阻燃性

研究了纳米硅灰石的添加对中密度纤维板（MDF）某些防火性能的改善作用。纳米硅灰石以四个含量（2％，4％，6％和8％）添加。至少70％的纳米硅灰石颗粒的尺寸范围为30至110 nm。结果表明，纳米硅灰石对起燃时间的改善具有统计学意义。改善效果主要归因于含纳米硅灰石板的热导率增加。这种增加又导致树脂更好的固化以及其纤维的更高完整性。此外，纳米颗粒的表面可燃性降低，因此，火焰向木板内层的渗透被延迟，从而改善了阻燃性。发现具有不同防火特性的板的导热系数之间存在高度显着的相关性。得出的结论是，对于着火性能至关重要的应用，建议使用8％的纳米硅灰石含量。此外，还需要进一步的研究来比较和标准化从此处使用的设备获得的结果与从国际认可的设备（例如锥形量热仪）获得的结果进行比较和标准化。