Thermomechanical performance and high Brunauer‐Emmett‐Teller surface area of poly(vinyl alcohol)/silica/clay and poly(vinyl alcohol)/(fumed silica)/clay nanocomposites

Abstract

Poly(vinyl alcohol)/silica/clay (PVA-si-clay) and poly(vinyl alcohol)/(fumed silica)/clay (PVA-fsi-clay) nanocomposites were prepared via solution intercalation by exploiting phase separation based on the bridging of particles by polymer chains. Both nanocomposites were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, adsorption isotherm (Brunauer-Emmett-Teller model [BET]), X-ray fluorescence, thermogravimetric analysis, and tensile testing. The Fourier-transform infrared spectroscopy indicated that the PVA-si-clay (1.28E) nanocomposite had a much broader peak compared with other nanocomposites. The PVA-si-clay (1.28E) nanocomposite contained the highest percentage of silicon group compared with other nanocomposites. According to the results of the scanning electron microscopy, clay (1.28E) showed better compatibility with the PVA-si matrix followed by clay (1.30E) with PVA-fsi matrix. The results of the Brunauer-Emmett-Teller model showed PVA-si-clay (1.28E) and PVA-fsi-clay (1.30E) nanocomposites had a higher surface area and average pore volume with a smaller pore size. The hydroxylfunctionalized PVA compatibilizer enhanced the mechanical properties as well as the thermal properties because of a higher level of interaction between the hydroxyl groups of PVA, the silanol groups of silica phase, and the modified clay. J. VINYL ADDIT. TECHNOL.,

A review on versatile applications of polyvinyl alcohol thin films, specifically as sensor devices

“…6,7 PVA as a polyhydroxyl compound is commonly prepared through vinyl acetate polymerization followed by alcoholysis. 8 In addition, the PVA polymer is a great host matrix that can be embedded with metals and organic nanoparticles (NPs) in order to attain specific chemical, physical, mechanical, electrical, and optical characteristics. 3,4 PVA contains alternate hydroxyl groups along the main chain that can be chemically modified for various purposes.…”

“…Indeed, thin film technology is a progressive field of research involving controlled condensation process of atoms, molecules, and ions with diverse applications in nanoscience and nanotechnology 6,7 . PVA as a polyhydroxyl compound is commonly prepared through vinyl acetate polymerization followed by alcoholysis 8 . In addition, the PVA polymer is a great host matrix that can be embedded with metals and organic nanoparticles (NPs) in order to attain specific chemical, physical, mechanical, electrical, and optical characteristics 3,4 .…”

A study on UV‐protection property of poly(vinyl alcohol)‐montmorillonite composite nanofibers

“…However, PVA is strongly hydrophilic and soluble in water because the hydroxyl ( OH) groups are located on alternating carbon atoms in its structure. [10,11] Montmorillonite (MMT) is the most commonly used clay mineral which has attracted great attention due to its remarkable improvement in mechanical, thermal, flameretardant, and barrier properties of polymeric composites with small amounts (1-10 wt%) of MMT fillers added. These property improvements are attributed to the nanometric thickness and high aspect ratio of the individual clay platelets, as well as to the nanocomposite morphology with the platelets being exfoliated and well-dispersed.…”