Zeolitic imidazolate frameworks‐8 modified graphene as a green flame retardant for reducing the fire risk of epoxy resin

Abstract

A novel hybrid material of ZIF‐8/RGO (zeolitic imidazolate frameworks‐8 loaded the surface of graphene) was synthesised by a simple method and characterized. Then, ZIF‐8/RGO was added into epoxy resin (EP), and the flame retardancy and smoke suppression of the EP composites were studied. Compared with pure EP, the peak heat release rate and the total heat release of the EP composites were reduced remarkably, and their LOI and UL94 vertical burning rating were also improved. In addition, their smoke production rate and total smoke production were decreased drastically. The improved flame retardancy and smoke suppression were mainly attributed to the physical barrier effect of graphene. Meanwhile, the metal oxide decomposed from ZIF‐8 could contribute to the production of char residue and enhance the compactness of the char layer.

Novel Phosphorus-Nitrogen-Containing Ionic Liquid Modified Metal-Organic Framework as an Effective Flame Retardant for Epoxy Resin

“…They have offered great advantages in various applications due to their highly tunable chemical properties and pore structrues [11,12]. Recently, several MOFs have been investigated as flame retardants in polymers [13][14][15][16][17][18][19]. For instance, Hu et al [15] synthesized iron-based and cobalt-based MOFs and investigated the flame-retardant properties of MOF/polystyrene composites.…”

Tunable thermal, mechanical, and controlled-release properties of epoxy phenolic novolac resin microcapsules mediated by diamine crosslinkers

“…Epoxy resins are one of the most versatile classes of polymeric materials that contain two or more epoxy groups in one molecular. 16 Currently, epoxy resins play an indispensable role in various elds, such as coatings, aerospace, adhesives, paints, and engineering plastics. [17][18][19] Up to now, there were few literatures relevant to the fabrication of microcapsules/microspheres using epoxy resins as shells.…”

“…22 Epoxy resins are reactive monomers and can chemically react with numerous crosslinkers (including imidazoles, diamines, carboxylic acids and polyamides) to form polymeric epoxy systems with a wide range of physicochemical properties, such as excellent chemical resistance and superb mechanical properties. 16,[23][24][25] Among these crosslinker families, diamines are the most widely used agents owing to their wide availability, low cost and fast reaction. Previous work has shown that when aromatic polyamine was used as crosslinking agent, reaction temperature could control the pore size and porosity of the MCs and thus regulate the release of the core materials.…”

Synergistic Effect of Mesoporous Nanocomposites with Different Pore Sizes and Structures on Fire Safety and Smoke Suppression of Epoxy Resin

“…Graphene can be used to enhance the fire resistance properties of polymers due to its physical barrier performance . However, high‐performance graphene‐based polymer composite is extremely tough, since graphene tends to aggregate due to the π–π interaction and loose mutual effect with solvents .…”

“…However, high‐performance graphene‐based polymer composite is extremely tough, since graphene tends to aggregate due to the π–π interaction and loose mutual effect with solvents . Massive efforts have been focused on the surface functionalization of graphene to solve the aggregation problem . Wang et al prepared a polyphosphamide‐functionalized graphene to decrease the flammability of epoxy resin (EP) .…”