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Superior flame retardant by combining high aspect ratio layered double hydroxide and graphene oxide

Title data

Edenharter, Andreas ; Feicht, Patrick ; Diar Bakerly, Bashar ; Beyer, Günter ; Breu, Josef:
Superior flame retardant by combining high aspect ratio layered double hydroxide and graphene oxide.
In: Polymer. Vol. 91 (March 2016) . - pp. 41-49.
ISSN 0032-3861
DOI: https://doi.org/10.1016/j.polymer.2016.03.020

Abstract in another language

By combining two platy nano-additives with high aspect ratio, a layered double hydroxide (LDH) and graphene oxide (GO), remarkable flame retardancy in polystyrene nanocomposite was observed. Surprisingly the effect is superior to nanocomposites made with either of the two types of fillers. The nanocomposites were prepared via solution blending from tetrahydrofuran utilizing a three-roll mill for improved compounding. Highly stable suspension of a mixture of the two nano-additives in THF afforded a sophisticated surface modifications of LDH and GO using 3,4-dihydroxybenzophenone (DBP) and 1-dodecylamine (DDA), respectively. Forced sedimentation tests and particle size distribution confirmed the good suspension and suggested that heterocoagulation between the two types of oppositely charged colloids could be prevented by the appropriate combination of surface modificators. Cone calorimetry revealed a significant reduction of the peak of heat release rate of 47% at a very low loading (5.5 wt%). Most interestingly, after formation of a protective layer, combustion occurred at a much reduced heat release rate, and consequently, the related burn out time was prolonged by 154%. While, as usual, these platy inorganic fillers fail to reduce time of ignition or improve limiting oxygen index, the pronounced push of the burn out time underlines the great potential resting in the combination of different types of adjuvant fillers. The remarkably reduced heat release rate for longer burning times is superior to other published nanocomposites. When combining this system with flame retardants decreasing total heat evolved and reducing the initial peak of heat release rate, very efficient flame retardant systems will be obtained.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Polystyrene nanocomposite; Synergistic flame retardant; Layered double hydroxide;
Graphene oxide; Surface modification
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie > SFB 840 - TP B 3
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 27 Mar 2018 06:02
Last Modified: 27 Mar 2018 06:02
URI: https://eref.uni-bayreuth.de/id/eprint/43116