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.

Covalently surface modification of a-MnO2 nanorods with L-valine amino acid by solvothermal strategy, preparation of PVA/a-MnO2-L-valine nanocomposite films and study their morphology,

Abstract

The surface of α-manganese dioxide (α-MnO2) nanorods was modified chemically with L-valine amino acid by a solvothermal strategy. The α-MnO2 nanorods were prepared by a hydrothermal method. Then poly(vinyl alcohol)/α-MnO2-L-valine nanocomposites (NCs) containing 1, 3 and 5 wt% of modified α-MnO2 nanorods were prepared through an ultrasound-assisted technique.

Novel ternary poly (vinyl pyrrolidone)/poly (amide-imide)/ZnO nanocomposite: Synthesis, characterization, thermal and optical performance,

Abstract

The present work describes the synthesis and properties of polymer composites based on poly(vinyl pyrrolidone) (PVP) as polymer shell and poly(amide-imide)(PAI)/ZnO nanocomposite (ZNC) as efficient filler. At first, the alanine amino acid containing dicarboxylic acid was grafted on the surface of ZnO NPs. Then, modified ZnO (12 wt%) was incorporated into the PAI matrix under ultrasonic irradiations. The obtained hybrid ZNC showed high thermal stability and the size of the NPs in the TEM image of ZNC was about 31 nm.

Synthesis, morphology investigation and thermal mechanical properties of dopamine-functionalized multi-walled carbon nanotube/poly (amide-imide) composites

Abstract

Here, poly(amide-imide) (PAI) composites containing multi-walled carbon nanotubes (MWCNT) were synthesized with solution casting method. To improve the dispersion and compatibility with the polymer matrix the MWCNT was surface-modified with dopamine biomolecule under microwave irradiation.

Sonochemical Preparation and Characterization of Modified CuO Nano crystalline with Bioactive Chiral Diacids Derived from Different Natural Amino acids

Abstract

To improve the dispersion ability of CuO nanoparticles (NPs), their surface was modified by chiral diacids (DAs) containing amino acids. The surface modification process was achieved using ultrasonic irradiation. DA could be absorbed on the surface of CuO. The carboxyl groups of DA may interact with surface of CuO NPs and form covalent bond with it. Interactions between DAs and CuO NPs were investigated by different techniques.

Surface modification of Mg-doped fluoridated hydroxyapatite nanoparticles using bioactive amino acids as the coupling agent for biomedical applications, Ceramics International, 2015.

Abstract

Hydroxyapatite (HA) has been extensively utilized in the field of biomaterials as a bioactive ceramic. Development of modified-HA by the substitution of Ca ions and OH−groups not only makes its chemical composition similar to that of the natural bone tissue, but also improves the in vitro behavior of commercially synthesized HA. Accordingly, magnesium-fluoridated hydroxyapatite nanoparticles (Mg-FHA NPs) have been recently developed.

A general and efficient route to covalently surface modification of MWCNTs by dopamine and their synergistic reinforcing effects in chitosan films

Abstract

Multiwalled carbon nanotubes (MWCNTs) were considered as ideal filler in a polymer matrix due to their outstanding mechanical, electrical and thermal properties. This article describes a simple route to preparation of nanocomposite (NC) of chitosan and modified MWCNT by solution casting method. The process involves modification of MWCNT with dopamine and effects of modified MWCNT on dispersion, mechanical, thermal and morphological properties.