Kandola Baljinder K, Luangtriratana Piyanuch, Duquesne Sophie, Bourbigot Serge
Institute for Materials Research and Innovation, University of Bolton, Bolton BL3 5AB, UK.
Unité Matériaux et Transformations (UMET)-CNRS UMR 8207-Group Reaction and Resistance to Fire (R2Fire), École Nationale Supérieure de Chimie de Lille, University of Lille, Avenue Mendeleiev, CS 90108, 59652 Villeneuve d'Ascq Cedex, France.
Materials (Basel). 2015 Aug 11;8(8):5216-5237. doi: 10.3390/ma8085216.
Intumescent coatings are commonly used as passive fire protection systems for steel structures. The purpose of this work is to explore whether these can also be used effectively on glass fibre-reinforced epoxy (GRE) composites, considering the flammability of the composites compared to non-flammable steel substrate. The thermal barrier and reaction-to-fire properties of three commercial intumescent coatings on GRE composites have been studied using a cone calorimeter. Their thermophysical properties in terms of heating rate and/or temperature dependent char expansion ratios and thermal conductivities have been measured and correlated. It has been suggested that these two parameters can be used to design coatings to protect composite laminates of defined thicknesses for specified periods of time. The durability of the coatings to water absorption, peeling, impact, and flexural loading were also studied. A strong adhesion between all types of coatings and the substrate was observed. Water soaking had a little effect on the fire performance of epoxy based coatings. All types of 1 mm thick coatings on GRE helped in retaining ~90% of the flexural property after 2 min exposure to 50 kW/m² heat flux whereas the uncoated laminate underwent severe delamination and loss in structural integrity after 1 min.
膨胀型防火涂料通常用作钢结构的被动防火保护系统。考虑到与不可燃的钢基材相比，玻璃纤维增强环氧树脂（GRE）复合材料的易燃性，这项工作的目的是探索这些涂料是否也能有效地用于GRE复合材料。使用锥形量热仪研究了三种商用膨胀型防火涂料在GRE复合材料上的热障和遇火反应特性。测量并关联了它们在加热速率和/或与温度相关的炭膨胀率及热导率方面的热物理性质。有人提出，这两个参数可用于设计涂料，以在特定时间段内保护规定厚度的复合层压板。还研究了涂料对吸水、剥离、冲击和弯曲载荷的耐久性。观察到所有类型的涂料与基材之间都有很强的附着力。水浸泡对环氧基涂料的防火性能影响较小。GRE上所有类型的1毫米厚涂料在暴露于50kW/m²热通量2分钟后，有助于保持约90%的弯曲性能，而未涂覆的层压板在1分钟后会发生严重分层并失去结构完整性。
