阻燃剂
材料科学
层状双氢氧化物
氧化物
石墨烯
烧焦
复合数
涂层
化学工程
锌
金属氢氧化物
复合材料
氢氧化物
热解
冶金
纳米技术
工程类
作者
Shaotang Dong,Guoqing Xiao,Chunlin Chen,Chunyan Chen,Jing Wang,Fei Zhong,Mingtan Wang,Rui Zou
标识
DOI:10.1016/j.colsurfa.2021.127736
摘要
Layered double hydroxides acts as an effective inorganic nano-fire retardant, which is capable of releasing water, carbon dioxide and diluting the concentration of combustible gases when encountering flames, thus providing fire protection. Here, zinc-aluminum layered double hydroxides (Zn-Al/LDH) is uniformly anchored on the reduced graphene oxide (RGO) surface by a simple hydrothermal strategy in order to further enhance the barrier effect of the char layer. The obtained Zn-Al/LDH anchored reduced graphene oxide (Zn-Al/[email protected]) hybrids were added to waterborne epoxy resin and their fire resistance properties were measured by large plate combustion test, furnace storage test and thermal weight loss test. The results showed that the incorporation of nano-fillers effectively enhanced the fire resistance of the composite coatings. Among them, Zn-Al/[email protected] -based fireproof coatings presented better fire performance due to the active flame retardant mechanism of Zn-Al/LDH and the high barrier property of RGO nanosheets. In contrast, the composite coating with 1.5% of Zn-Al/[email protected] hybrids had the lowest backside temperature of 154.3 °C. Besides, the Zn-Al/[email protected]/EP (1.5%) coating also exhibited the highest expansion height (16.5 mm), expansion rate (12.13) and the highest char residue rate (32.2%), indicating its highest fire retardant performance.
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