Abstract
The utilization of layered nanofillers in polymer matrix, as reinforcement, has attracted great interest in the 21st century. This can be attributed to the high aspect ratios of the nanofillers and the attendant substantial improvement in different properties (i.e., increased flammability resistance, improved modulus and impact strength, as well as improved barrier properties) of the resultant nanocomposite when compared to the neat polymer matrix. Amongst the well-known layered nanofillers, layered inorganic materials, in the form of LDHs, have been given the most attention. LDH nanofillers have been employed in different polymers due to their flexibility in chemical composition as well as an adjustable charge density, which permits numerous interactions with the host polymer matrices. One of the most important features of LDHs is their ability to act as flame-retardant materials because of their endothermic decomposition. This review paper gives detailed information on the: preparation methods, morphology, flammability, and barrier properties as well as thermal stability of LDH/polymer nanocomposites.
Highlights
Polymer matrices are normally reinforced with inorganic fillers in order to improve their properties and widen their applications [1]
The improvement in properties of the layered double hydroxides (LDHs)/polymer systems depended on the dispersion of the nanofiller within the polymer matrices
There was an improvement in the flammability resistance of polymer matrices with the addition of LDHs with different compositions
Summary
Polymer matrices are normally reinforced with inorganic fillers in order to improve their properties and widen their applications [1]. The sol-gel method forms LDHs with a larger surface area than those formed by the co-precipitation method [37,38,39] Properties such as basicity as well as the divalent and trivalent metal ion molar ratios of LDHs synthesized with the sol-gel method are still not understood [38,39,40]. The mixed metal oxides formed after the calcination of LDHs at high temperatures between 500–800 ◦ C are rehydrated and formed into an LDH structure in the presence of the desired anions [42,43,44,45,46,47]
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