Spectral, surface and thermal properties of poly(vinylpyrrolidone)/organo-modified-TiO₂/organo-modified-layered silicate ternary nanocomposites containing l-leucine amino acid fabricated by sonication process

Abstract

ArticleSpectral, surface and thermal properties of poly(vinylpyrrolidone)/organomodified-TiO 2 /organo-modified-layered silicate ternary nanocomposites containing L-leucine amino acid fabricated by sonication process Abstract Since a few years ago, a topic of curiosity consists in evolving composites filled with the nanofillers to improve various properties of polymer matrix. This work aims to investigate the structure-property relationship in ternary nanocomposites containing of amorphous poly(vinylpyrrolidone) as the matrix, organo-modified-TiO 2 nanoparticles and organo-modified-montmorillonite as the nanofillers. In this regard, poly(vinylpyrrolidone)/organo-modified-TiO 2 / organo-modified-montmorillonite nanocomposites were prepared by sonication process with 10 wt% of organomodified-TiO 2 and different loadings (3, 5 and 7 wt%) of organo-modified-montmorillonite. Nanostructure characterization and dispersion capacity of nanofillers in the polymer matrix were investigated by X-ray diffraction, transmission electron microscopy and field emission scanning electron microscopy. According to these data, the nanostructure of ternary nanocomposites was predominantly intercalated. Also, incorporation of the organoclay and TiO 2 nanoparticles into the poly(vinylpyrrolidone) system was observed to have an obvious effect on the shape and size of polymer matrix. According to thermogravimetric analysis data, the presence of organo-modified-montmorillonite and organo-modifiedTiO 2 in the poly(vinylpyrrolidone) matrix, caused an improved in the thermal stability of the obtained poly(vinylpyrrolidone) nanocomposites.

Synergistic effects of hybrid conductive fillers on the electrical properties of carbon fiber pultruded polypropylene/polycarbonate composites prepared by injection molding

“…Since the use of polymer/conductive filler composites is increasing numerously in the field of industrial applications and house appliances, many investigators have examined the electrical conductivity and electromagnetic interference shielding effectiveness (EMI SE) of the composites. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] The value of shielding effectiveness, decibel (dB), is an important parameter that measures the shielding of a device from EMI. Electronic devices produce electromagnetic emissions, and the emissions can interfere with the operation of other electronic equipment near it, causing potential problems.…”

Visible and ultraviolet antibacterial behavior in PVDF–TiO2 nanocomposite films

“…Taking into account that preparation approach makes use of an oxide previously calcined at high temperature to ensure the unique presence of anatase polymorph and the subsequent severe control of its biocidal capabilities, nanometric distribution of the oxide at these loadings under study is significant, particularly with respect to micro-sized or bulk oxide specimens. [26][27][28][29][30] Improved dispersion of the oxide could be obtained by using low temperature routes that do not require a calcination step to synthesize the oxide but this would involve a limited phase control (e.g., presence of titania amorphous phases). [31] These results seem to indicate a good interfacial contact between nanoparticles and the PVDF polymeric matrix.…”