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碳纳米管改性层状α-二氧化锰复合阻燃剂:制备及其在环氧树脂阻燃中的性能

CNT modified layered α-MnO hybrid flame retardants: preparation and their performance in the flame retardancy of epoxy resins.

作者信息

Qian Xiaodong, Shi Congling, Jing Jingyun

机构信息

Beijing Key Laboratory of Metro Fire and Passenger Transportation Safety, China Academy of Safety Science and Technology Beijing 100012 China

出版信息

RSC Adv. 2020 Jul 21;10(46):27408-27417. doi: 10.1039/d0ra03654d.

DOI:10.1039/d0ra03654d
PMID:35516958
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055619/
Abstract

In this paper, CNT modified layered α-MnO hybrid flame retardants (α-MnO-CNTs) were synthesized through one-pot preparation. The structure and composition of the α-MnO-CNTs hybrid flame retardants were investigated by X-ray diffraction, TEM and SEM. Subsequently, the α-MnO-CNTs hybrids were then incorporated into epoxy resin (EP) to improve the fire safety properties. Compared with pure EP and the composites with CNTs or α-MnO, EP/α-MnO-CNTs composites exhibited improved flame retardancy and smoke suppression properties. With the incorporation of only 2.0 wt% of α-MnO-CNTs hybrid flame retardants, the peak heat release rate and total heat release of the composites showed 34% and 10.7% reduction respectively. In addition, the volatile gases such as CO and CO were reduced and the smoke generation was also effectively inhibited. The improved fire safety of the composites is generally due to the network structures and the synergistic effect of α-MnO and CNTs, the catalyzing charring effect, smoke suppression and the physical barrier effect of α-MnO nanosheets.

摘要

在本文中,通过一锅法制备了碳纳米管(CNT)改性的层状α-二氧化锰杂化阻燃剂(α-MnO-CNTs)。采用X射线衍射、透射电子显微镜(TEM)和扫描电子显微镜(SEM)对α-MnO-CNTs杂化阻燃剂的结构和组成进行了研究。随后,将α-MnO-CNTs杂化物加入到环氧树脂(EP)中以提高其防火性能。与纯EP以及含有CNTs或α-MnO的复合材料相比,EP/α-MnO-CNTs复合材料表现出更好的阻燃性和抑烟性能。仅加入2.0 wt%的α-MnO-CNTs杂化阻燃剂时,复合材料的热释放峰值速率和总热释放量分别降低了34%和10.7%。此外,一氧化碳(CO)等挥发性气体减少,烟雾生成也得到有效抑制。复合材料防火性能的提高通常归因于网络结构以及α-MnO和CNTs的协同效应、α-MnO纳米片的催化成炭效应、抑烟作用和物理阻隔效应。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4140/9055619/1c0927e27a66/d0ra03654d-s2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4140/9055619/1c0927e27a66/d0ra03654d-s2.jpg
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