Functionalised layered double hydroxide (LDH) were synthesised in a one-step reaction by mixing a solution of organic compounds (SDBS sodium dodecylbenzenesulfonate, sCD hydroxypropyl-sulfobutyl-beta-cyclodextrin and taurine) with solutions of magnesium nitrate Mg(NO3)2 and aluminium nitrate Al(NO3)3 and adjusting pH, then filtering and drying the resulting slurry. The resulting nano LDHs were incorporated into epoxy by mixing, acetone dissolution, then vacuum heat drying. With 6% LDH loading, UL94-V0 (3.2 mm) was achieved, peak heat release rate was reduced to around one third of that of pure epoxy, and total smoke production was also reduced nearly to one third. Reduction of epoxy impact and tensile strength was limited.
“Functionalized layered double hydroxide-based epoxy nanocomposites with improved flame retardancy and mechanical properties”, E. Kalali, J. Mater. Chem. A, 2015, 3, 6819–6826