Layered double hydroxides/reduced graphene oxide nanocomposites with enhanced barrier properties

Abstract

A hybrid layered double hydroxides (LDHs)‐reduced graphene oxide (rGO) material has been fabricated by the facile co‐precipitation method. The structural characterization and morphological observation of the composites suggest that small LDH‐rGO crystals are in situ grown on the surface of GO nanosheets, preventing the compact stacking of GO. The poly(vinyl alcohol) (PVA)/LDH‐rGO hybrid films with different contents of LDH‐rGO are prepared and investigated. The results show that the LDH‐rGO composites are homogeneous dispersed in PVA matrix based on scanning electron microscopy and transmission electron microscopy observations. The PVA/LDH‐rGO film exhibits significantly improved mechanical and barrier properties compared with those of the pure PVA film. POLYM. COMPOS., 39:3841–3848, 2018. © 2017 Society of Plastics Engineers

Synthesis and characterization of polyaniline–hydrotalcite–graphene oxide composite and application in polyurethane coating

“…GO-HT was also used as an anticorrosion ller in organic coatings, such as polyvinyl alcohol, PMMA, and acrylic lm. 20,[37][38][39] These research studies all proposed the same anticorrosion mechanism of GO-HT in organic coating, which is the enhancement of the barrier behavior.…”

Trends in Layered Double Hydroxides‐Based Advanced Nanocomposites: Recent Progress and Latest Advancements

“…[ 50 ] In a case, the as‐prepared LDH‐rGO crystals by the constant pH coprecipitation method were encapsulated in the PVA using the solution casting method, resulting in the PVA/LDH‐rGO films. [ 51 ] During the fabrication of these nanocomposites, the LDH‐rGO crystals acted as nanofillers. However, an increase in the content of the LDH‐rGO crystals might have resulted in the enhanced aggregation of the deposited nanocomposites in the PVA films and deprived mechanical properties of the composites.…”

“…However, an increase in the content of the LDH‐rGO crystals might have resulted in the enhanced aggregation of the deposited nanocomposites in the PVA films and deprived mechanical properties of the composites. [ 51 ] Similarly, numerous efforts have encapsulated LDHs within various polymers (PCL, poly(butylene adipate‐co‐terephthalate) (PBAT), and PDA) to obtain homogenous films for improved performance efficacy. [ 52 ] In addition to coating, a solution containing additives can fabricate LDHs using the surfactant solution and emulsions.…”

A Facile Synthesis of Core-Shell SiO2@Cu-LBMS Nano-Microspheres for Drug Sustained Release Systems

“…This will enhance several crucial properties of “free” drugs, such as improving their solubility, in vivo stability and specificity, and reducing or eliminating tissue damage [1]. During the past several years, many nanomaterials have been used in drug delivery systems, such as mesoporous silica (MS) [2,3,4], mesoporous magnesium carbonate (MMC) [5], highly porous amorphous calcium carbonates (HPACC) [6], polymeric nanoparticles [7], liposomes [8], carbon nanodots (CDs) [9] and brucite-like materials [10,11,12,13,14,15,16,17]. MS, MMC and HPACC are inorganic nanomaterials, and the mechanism of drug loading mainly depends on pore adsorption.…”

“…Compared with materials as mentioned above, layer compounds with a brucite-like structure provide a suitable interlayer spacing for drug molecules. It presents good drug loading capacity and drug releasing performance, facile synthesis, stability, biocompatibility and biodegradability [12,13]. Therefore, it is an excellent candidate for drug delivery systems.…”