Tasi Tsung-Pin, Hsieh Chien-Te, Yang Hsi-Chi, Huang Heng-Yu, Wu Min-Wei, Ashraf Gandomi Yasser
Division of Research and Development, Cite Engineering Consultants Ltd., Miaoli 350011, Taiwan.
Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan.
Polymers (Basel). 2022 Dec 18;14(24):5542. doi: 10.3390/polym14245542.
Flame-retardant chemicals are frequently used within consumer products and can even be employed as a treatment on the surface of different types of materials (e.g., wood, steel, and textiles) to prevent fire or limit the rapid spread of flames. Functionalized graphene oxide (FGO) nanosheets are a promising construction coating nanomaterial that can be blended with sodium metasilicate and gypsum to reduce the flammability of construction buildings. In this work, we designed and fabricated novel and halogen-free FGO sheets using the modified Hummers method; and subsequently functionalized them by pentaerythritol through a chemical impregnation process before dispersing them within the construction coating. Scanning electron microscopic images confirm that the FGO-filled coating was uniformly dispersed on the surface of wooden substrates. We identified that the FGO content is a critical factor affecting the fire retardancy. Thermogravimetric analysis of the FGO coating revealed that higher char residue can be obtained at 700 °C. Based on the differential scanning calorimetry, the exothermic peak contained a temperature delay in the presence of FGO sheets, primarily due to the formation of a thermal barrier. Such a significant improvement in the flame retardancy confirms that the FGO nanosheets are superior nanomaterials to be employed as a flame-retardant construction coating nanomaterial for improving thermal management within buildings.
阻燃化学品常用于消费品中，甚至可用于对不同类型材料（如木材、钢材和纺织品）的表面进行处理，以防止火灾或限制火焰的快速蔓延。功能化氧化石墨烯（FGO）纳米片是一种很有前景的建筑涂料纳米材料，可与偏硅酸钠和石膏混合以降低建筑的可燃性。在这项工作中，我们使用改进的Hummers方法设计并制备了新型无卤FGO片材；随后通过化学浸渍工艺用季戊四醇对其进行功能化，然后将它们分散在建筑涂料中。扫描电子显微镜图像证实，填充FGO的涂料均匀地分散在木质基材表面。我们发现FGO含量是影响阻燃性的关键因素。对FGO涂层的热重分析表明，在700°C时可获得更高的残炭量。基于差示扫描量热法，在存在FGO片材的情况下，放热峰出现温度延迟，这主要是由于形成了热障。阻燃性的如此显著提高证实了FGO纳米片是用于改善建筑物内热管理的阻燃建筑涂料纳米材料的优异纳米材料。
