Synthesis and thermal properties of ZnAl layered double hydroxide by urea hydrolysis

Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

“…The FTIR spectra of the Ni‐U and Co‐U samples [Figure (a–c)] showed a broad absorption band near 3450 cm −1 , attributed to the vibration of the OH bond of hydroxyl groups of LDH layers and the intercalated or adsorbed water molecules, while in the region of 1620–1640 cm −1 the bands are associated with angular deformation of the water molecules.…”

“…The main band in the region of 1340 cm −1 is attributed to carbonate/nitrate anions (nitrate as a shoulder at the left side of the main band) and the bands in the region of 650 cm −1 [Figure (a–c,A,D)] are attributed to the MOH bond, being characteristic of LDH . In the sample intercalated with nitrate anions [Figure (c,A)], a typical band of NO bond of nitrate anion was observed at 1342 cm −1 , while the broad band with a shoulder at lower wavenumbers suggests the presence of carbonate contamination.…”

A facile and simple synthetic strategy for the preparation of modified NiAl-layered double hydroxide as nanofiller for L-phenylalanine containing poly(amide-imide)s based nanocomposites

“…[17][18][19][20] There is an increasing attention for these materials owing to their several applications in many fields such as catalysis, removal of waste agents from water, stabilizers and rheology modifiers, preparation of pigments, pharmaceutical and cosmetic formulations, symptomatic treatment of peptic ulcer and therapy of digestive disorders, drug and biomolecule hosts, organic-inorganic NCs. [20][21][22][23][24][25][26][27][28][29][30] High-performance polymers are good candidates as matrices in NCs due to their excellent properties, namely high thermal stability, stiffness, flame retardancy, strength, thermo-oxidative stability, toughness, high conductivity, chemical and solvent resistance, low dielectric constant, retained properties at very high temperatures, and long storage periods. [31][32][33][34] Poly(amide-imide)s (PAI)s are one of the most successful classes of high-performance polymers.…”

Réteges kettős hidroxidok előállítása ultrahang besugárzással segített mechanokémiai módszerrel

“…fémionok beépülésével [3]. Azonban arra is találhatunk több példát, amikor az alapréteg a háromvegyértékű alumínium alkotta gibbszit hidroxidréteg, amelynek szerkezete nagyon hasonló a brucit lamelláris felépítéséhez [4,5]. A réteges kettős hidroxidok általános összegképletét a következőképpen szokás felírni:…”

“…Azonban az említett gibbszit alapú réteges kettős hidroxidoknál x értéke akár 0,8 is lehet [4]. A réteges kettős hidroxidok esetén fontos megjegyezni egy gyakran használatos fogalmat, a rétegtávolságot, melyet egy réteg és egy rétegközi tér vastagságának összege adja meg (1. ábra).…”