Nickel Metal–Organic Framework Derived Hierarchically Mesoporous Nickel Phosphate toward Smoke Suppression and Mechanical Enhancement of Intumescent Flame Retardant Wood Fiber/Poly(lactic acid) Composites

Abstract

Over the past decade, the use of metal–organic framework derived materials has emerged as a novel direction to prepare high performance polymer composites. In this work, nickel based metal–organic framework (Ni-MOF) was synthesized via a cost-effective and environmentally acceptable approach. Ni-MOF derived hierarchically mesoporous nickel phosphate was prepared via a facile hydrothermal method. Morphological evolution from Ni-MOF to nickel phosphate during the synthesis was clearly revealed. The microsized rod-like nickel phosphate was evaluated in both smoke suppression and mechanical enhancement of intumescent flame retardant wood fiber/poly­(lactic acid) system. The cone calorimeter test showed a 43% reduction in total smoke production when 5 wt % ammonium polyphosphate was substituted by nickel phosphate. More importantly, both tensile and impact strength of the composites were improved with the addition of nickel phosphate. The as-synthesized nickel phosphate proved to be a promising substitution for ammonium polyphosphate in wood fiber/poly­(lactic acid) composites.

Investigation of nickel ammonia phosphate with different morphologies as a new high-efficiency flame retardant for epoxy resin

“…In addition, Ni 2 P 2 O 7 can catalyze the formation of char residue. 33 Because the labyrinth-like nanosheets act as a barrier to oxygen and heat, they have better flame-retardant efficiency than the other morphologies, which is consistent with the Cone results. Therefore, NiNH 4 PO 4 ·H 2 O increases the thermal stability of the EP composites.…”

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.…”

Efficient Adsorption of Dyes Using Polyethyleneimine-Modified NH2-MIL-101(Al) and its Sustainable Application as a Flame Retardant for an Epoxy Resin

“…Reducing the released smoke can prolong the escape time of people in actual fires. 41 Figure 7 c,d shows the SPR and TSP results. The SPR and TSP values of EP are 0.368 m 2 /s and 37.864 m 2 , respectively, while the SPR and TSP values of 4% MO-PEI@MOF/EP are reduced by 29.6 and 13.7%, respectively.…”