Surface Modification of Sodium Montmorillonite Nanoclay by Plasma Polymerization and Its Effect on the Properties of Polystyrene Nanocomposites

Abstract

Sodium montmorillonite nanoclay (Na+-MMT) was modified by plasma polymerization with methyl methacrylate (MMA) and styrene (St) as monomers and was denominated as Na+-MMT/MMA and Na+-MMT/St, respectively. This plasma modified nanoclay was used as reinforcement for polystyrene (PS) nanocomposites that were prepared by melt mixing. Pristine and modified Na+-MMT nanoclay were analyzed by the dispersion in various solvents, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results confirmed a change in hydrophilicity of the modified Na+-MMT, as well as the presence of a polymeric material over its surface. The pristine PS/Na+-MMT and modified PS/Na+-MMT/MMA and PS/Na+-MMT/St nanocomposites were studied with X-ray diffraction (XRD), differential scanning calorimetry (DSC), and TGA, as well as mechanical properties. It was found that the PS/Na+-MMT/St nanocomposites presented better thermal properties and an improvement in Young’s modulus (YM) in compared to PS/Na+-MMT/MMA nanocomposites.

Investigation of thermal and mechanical properties of polybenzoxazine obtained in an in situ polymerization with surface‐modified montmorillonite clay

“…The peak that appeared at 1635 cm −1 is due to the bending vibrations of water molecules locked in between the layered clay molecules. [ 37 ] A more intense band appeared at 1078 cm −1 corresponds to SiOSi and SiOAl stretching vibrations. The band found at 913.23 cm −1 is due to the SiO stretching of the tetrahedral silica layers.…”

Influence of montmorillonite/carbon nanotube hybrid nanofillers on the properties of poly(lactic acid)

“…In contrary, for Mt 20A suspension, significant amount of sediments was obtained after 1 h, at the bottom of the vial, leaving almost clear solution at the top. Pristine Mt Na + is greatly hydrophilic because of the rich Na + cations in the clays, which are easily hydrated, and that makes it disperses fine in water on agitation (Narro-Céspedes et al, 2018). Likewise, the modifying agent 2MBHT on Mt 10A was suspected to provide good interaction with water molecules that promoted the nanoclay suspension in the solution.…”

Electrospray Fabrication of Ultrathin Chlorine-Resistant Polyamide Brackish Water Desalination Membrane with Protonated Montmorillonite Nanoplates

“…Moreover, the intercalation of MPD monomers into the swollen oleophobic MMT-H + further hinders their diffusion, accounting for the formation of ultrathin and dense laminar PA layers. It is hypothesized that this can be attributed to the delamination of MMT-H + due to the charge effect, swelling and surfactant dispersion during electrospray, followed by the postannealing step. ,, Besides, the extensive surface area provided by the ultrathin delaminated clay nanoplates allows for in situ interfacial polymerization and surface cross-linking before the aerosols make contact with the support membrane. Numerous researchers have provided compelling evidence of the interfacial compatibility of exfoliated nanomaterials at optimal loading in traditionally manufactured polymer nanocomposites, where the polymerization occurs around the 2D nanostructures. − Yet, little has been demonstrated on the in situ polymerization during electrospray fabrication.…”