l -Phenylalanine edge functionalized graphite nanoplatelets as a nanoscale filler for poly(ester–amide–imide) matrix

Abstract

The recent growth in studying graphene has proved the utilization of graphene as reinforcement filler in the synthesis of polymer nanocomposite. The potential application of graphene could be improved by covalent functionalization of graphene without any defects on the graphene basal plane through edge-selective functionalization process. To this aim, in this study graphite nanosheets were selectively functionalized at their edges with l-phenylalanine in a mild reaction medium.

Evaluation of Nanostructure, optical absorption, and thermal behavior of poly(vinyl alcohol)/poly (N-vinyl-2-pyrrolidone) based nanocomposite films containing coated SiO2 nanoparticles with citric acid and l(+)-ascorbic acid

Abstract

Nanocomposite films of poly(vinyl alcohol) (PVA)–poly(N-vinyl-2-pyrrolidone) (PVP) blend filled with different weight percentages of nano-silica were prepared using solution intercalation method. At first, to better dispersion and good compatibility of nano-silica embedded in the polymer matrix, surface tailoring of it was carried out by two bio-safe molecules, citric acid and l(+)-ascorbic acid. Then, the effect of the modified nano-silica (MS) on the PVA–PVP blend was studied.

Morphology and thermal properties of nanocomposites based on chiral poly (ester-imide) matrix reinforced by vitamin B1 functionalized multiwalled carbon nanotubes

Abstract

Chemical functionalization of carboxylated multiwalled carbon nanotubes with vitamin B1 was carried out under ultrasonic irradiation. The functionalized nanotubes were embedded in a chiral and biodegradable poly(ester-imide) to prepare multiwalled carbon nanotubes reinforced polymer nanocomposites. Optically active poly(ester-imide) was synthesized by step-growth polymerization of aromatic diol and amino acid based diacid.

The use of poly (amide-imide)/CuO as a filler for the preparation of poly (vinyl pyrrolidone) nanocomposites: Thermal and morphological studies

Abstract

Poly(vinyl pyrrolidone)/poly(amide–imide)–CuO nanocomposites were prepared by adding of poly(amide–imide)–CuO nanocomposite as filler in a poly(vinyl pyrrolidone) matrix via ultrasonication method. First, the surface of CuO nanoparticles was modified with a bioactive coupling agent using the ultrasonic-assisted technique in order to obtain a homogeneous dispersion of CuO nanoparticles in the poly(amide–imide) matrix. Then, modified CuO nanoparticles were dispersed in the poly(amide–imide) matrix.

Surface modification of MWCNTs with glucose and their utilization for the production of environmentally friendly nanocomposites using biodegradable poly(amide-imide) based on N-trimellitylimido-S-valine matrix

Abstract

In the present investigation, the preparation, characterization, and surface morphology of poly(amide-imide) (PAI)/multi-walled carbon nanotubes (MWCNTs) bionanocomposites (BNCs) were the main goals of the study. At first, an optically active PAI based on S-valine as a biodegradable segment was synthesized. Then, carboxyl-modified MWCNTs were functionalized with glucose (f-MWCNT) as a biological active molecule in a green method to achieve a fine dispersion of f-MWCNT bundles in the PAI matrix.