Esmailpour Ayoub, Majidi Roya, Taghiyari Hamid R, Ganjkhani Mehdi, Mohseni Armaki Seyed Majid, Papadopoulos Antonios N
Department of Physics, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran 22970021, Iran.
Wood Science and Technology Department, Faculty of Materials Engineering & New Technologies, Shahid Rajaee Teacher Training University, Tehran 22970021, Iran.
Polymers (Basel). 2020 Feb 3;12(2):303. doi: 10.3390/polym12020303.
The aim of this paper was to improve the fire retardancy of beech wood by graphene. Six fire properties, namely time to onset of ignition, time to onset of glowing, back-darkening time, back-holing time, burnt area and weight loss were measured using a newly developed apparatus with piloted ignition. A set of specimens was treated with nano-wollastonite (NW) for comparison with the results of graphene-treated specimens. Graphene and NW were mixed in a water-based paint and brushed on the front and back surface of specimens. Results demonstrated significant improving effects of graphene on times to onset of ignition and glowing. Moreover, graphene drastically decreased the burnt area. Comparison between graphene- and NW-treated specimens demonstrated the superiority of graphene in all six fire properties measured here. Fire retardancy impact of graphene was attributed to its very low reaction ability with oxygen, as well as its high and low thermal conductivity in in-plane and cross-section directions, respectively. The improved fire-retardancy properties by the addition of graphene in paint implied its effectiveness in hindering the spread of fire in buildings and structures, providing a longer timespan to extinguish a fire, and ultimately reducing the loss of life and property. Based on the improvements in fire properties achieved in graphene-treated specimens, it was concluded that graphene has a great potential to be used as a fire retardant in solid wood species.
本文旨在通过石墨烯提高山毛榉木材的阻燃性。使用一种新开发的有引导点火装置测量了六个燃烧特性，即着火起始时间、发光起始时间、返黑时间、返孔时间、燃烧面积和重量损失。制备了一组用纳米硅灰石（NW）处理的试样，以便与石墨烯处理试样的结果进行比较。将石墨烯和NW混入水性涂料中，并涂刷在试样的正面和背面。结果表明，石墨烯对着火起始时间和发光起始时间有显著的改善作用。此外，石墨烯大幅降低了燃烧面积。石墨烯处理试样和NW处理试样之间的比较表明，石墨烯在所测量的所有六个燃烧特性方面均具有优势。石墨烯的阻燃作用归因于其与氧气的极低反应能力，以及其在平面内和横截面方向分别具有的高和低导热性。在涂料中添加石墨烯所改善的阻燃性能意味着它在阻碍建筑物和结构中的火灾蔓延、提供更长的灭火时间以及最终减少生命和财产损失方面具有有效性。基于石墨烯处理试样在燃烧特性方面的改善，得出结论：石墨烯在实木种类中作为阻燃剂具有巨大潜力。
