Journal
CHEMICAL ENGINEERING JOURNAL
Volume 369, Issue -, Pages 8-17Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.03.045
Keywords
Self-healing; Fire-warning; Flame retardant nanocoating; Graphene oxide; Cellulose
Categories
Funding
- National Natural Science Foundation of China [51773064, 51403067]
- Natural Science Foundation of Guangdong Province [2017A030313303]
- Pearl River S&T Nova Program of Guangzhou [201710010062]
- Fundamental Research Funds for the Central Universities [2018MS04]
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Design and exploitation of flame retardant coatings with sensitive fire-warning response and self-healing capability are urgently needed to decrease the fire risk of combustible materials. Herein, we reported the fabrication of a novel multifunctional flame retardant nanocoating created by using graphene oxide (GO) and functional cellulose (FC) via one step self-assembly. The prepared nacre-like nanocoating endowed many kinds of combustible materials (including polypropylene, polyurethane foam and wood) with exceptional fire safety. All the coated substrates were self-extinguished in the flame retardant tests. More importantly, when being attacked by fire at the very early stage, it triggered the fire-warning in less than three seconds through the dramatic decrease of electrical resistance. Moreover, the nanocoating exhibited outstanding self-healing capability at room temperature. Due to the multiple hydrogen bondings between the ureido pyrimidinone groups on FC, the damaged coating could be healed successfully and almost recovered to its original integrated performance. Our work provides a new and effective route to remarkably improve the fire safety of the combustible materials, exhibiting an enticing prospect for its application in the fields of building, transportation and electrical equipment.
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