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Synthesis of a carbon nanotubes/ZnAl‐layered double hydroxide composite as a novel flame retardant for flexible polyurethane foams
Author(s) -
Xie Hongyan,
Ye Qing,
Si Jingyu,
Yang Wei,
Lu Hongdian,
Zhang Quanzheng
Publication year - 2016
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3735
Subject(s) - materials science , fire retardant , polyurethane , composite number , flammability , composite material , thermal stability , hydroxide , carbon nanotube , char , chemical engineering , pyrolysis , engineering
A composite consisting of carbon nanotubes and zinc aluminum‐layered double hydroxide (CNT/ZnAl‐LDH) with good solubility in liquid media was synthesized by a co‐precipitation method. The structural characterization and morphological observation demonstrated that the composite displayed a heterostructure with CNTs embedded in ZnAl‐LDH nanosheets. The influence of CNT/ZnAl‐LDH on the thermal stability and flammability performance of flexible polyurethane (PU) foams was characterized. It was established that CNT/ZnAl‐LDH could improve the thermal stability while reduce the peak heat release rate as well as the total smoke release of PU foams. The formation of a protective char with increased mechanical properties and high graphitization degree was mostly postulated for the improved flame retardancy. Copyright © 2015 John Wiley & Sons, Ltd.