Co-Effect Flame Retardation of Co₃O₄-Loaded Titania Nanotubes and α-Zirconium Phosphate in the Epoxy Matrix

Abstract

Like most macromolecule polymers, epoxy resin (EP) is easy to burn, and there are great fire safety hazards in the process of use. Therefore, how to improve the fire safety of EP becomes one of the problems to be considered in the application of EP. In this study, tricobalt tetraoxide (Co3O4)-loaded TiO2 nanotube (TNT) (Co3O4-TNT) hybrid material was prepared by the co-precipitation method, and organophilic α-ZrP (OZrP) was obtained by hexadecyl trimethyl ammonium bromide-intercalated α-zirconium phosphate (α-ZrP) which was prepared by the hydrothermal synthesis method. Then, a series of nanocomposites were obtained by adding the synthesized nanomaterials to the EP at a certain ratio. The structure and morphology characterization indicated that Co3O4-TNTs and OZrP were synthesized successfully. The results of thermogravimetric analysis showed that the co-addition of Co3O4-TNTs and OZrP could further enhance the thermal stability of EP. The results of a cone calorimeter showed that EP/OZrP/Co3O4-TNTs had the lowest peak heat release rate and total heat release, which decreased by 36.2 and 35.4%, respectively, compared with the pure EP. This indicates that Co3O4-TNTs and OZrP had a good synergetic flame retardant effect and could effectively enhance the flame retardancy of EP.

Nanohybrid of Co3O4 Nanoparticles and Polyphosphazene-Decorated Ultra-Thin Boron Nitride Nanosheets for Simultaneous Enhancement in Fire Safety and Smoke Suppression of Thermoplastic Polyurethane

“…Based on the analysis of the gaseous and condensed phases, the excellent flame retardancy of BNNO@Co 3 O 4 @PPZ nanohybrid flame retardant, as shown in Figure 11 , can be ascribed to the joint effect of BNNO, Co 3 O 4 , and PPZ. During the combustion, Co 3 O 4 in the inner layer of nanohybrid flame retardant can catalyze CO, NO, and other combustible pyrolysis gases to generate CO 2 , NO 2 , and non-combustible gases, thus suppressing the toxic gases [ 41 , 56 , 61 , 62 ], which is consistent with the results of TG-IR. PPZ and Co 3 O 4 can catalyze the formation of carbon, which is conducive to the formation of a denser char layer.…”

Nano lamellar zirconium phosphate and screw speed changing properties of melt extrusion polypropylene nanocomposites

“…As can be seen in Figures 13 and 14 They mentioned that the SEM morphology revealed a surface rougher with several irregular wrinkles and good interaction force between the nanoparticles and the EP matrix. 64 Castillo and Barbosa studied the effect of hydrated magnesium silicates with different particle morphologies, such as platelets (talc) and fibers (sepiolite) in PP nanocomposites. SEM micrographs of nanocomposites containing a king of sepiolite revealed the presence of fiber aggregates indicating that the dispersion was not totally effective.…”

Preparation of boron nitride hybrid containing phosphorus and silicon and its effect on flame retardant, smoke suppression, and thermal conductivity properties of styrene‐butadiene rubber

“…In recent years, two‐dimensional nanomaterials have attracted the attention of researchers and have been broadly utilized within the areas of fire retardants, 3 heat conduction, 4 and semiconductors 5 . Common two‐dimensional materials include graphene, 6 double‐layer hydroxide, 7 carbon nitride, 8 boron nitride, 9 and others 10 . Similar to graphene, hexagonal boron nitride is a layered compound with low density, 11 high thermal conductivity, 12 and high‐temperature resistance, 13 which have been widely used in various fields.…”

“…5 Common two-dimensional materials include graphene, 6 double-layer hydroxide, 7 carbon nitride, 8 boron nitride, 9 and others. 10 Similar to graphene, hexagonal boron nitride is a layered compound with low density, 11 high thermal conductivity, 12 and high-temperature resistance, 13 which have been widely used in various fields. Hexagonal boron nitride (h-BN) has a twodimensional lamellar structure, which may provide a good physical barrier function, 14 and due to its unique crystal structure, it has high thermal conductivity.…”