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.
Effects of glucose‐functionalized multiwalled carbon nanotubes on the structural, mechanical, and thermal properties of chitosan nanocomposite films
ABSTRACT
A series of multiwalled carbon nanotubes (MWCNTs) grafted by chitosan nanocomposite (NC) films were prepared by a direct blending process and solution casting method. In this study, we modified multiwalled carbon nanotubes with glucose (MWCNT–Gl) for this purpose, and the effects of MWCNT–Gl on the structural, mechanical, and thermal properties of chitosan films with different contents of MWCNT–Gl were investigated.
The utilization of poly(amide-imide)/SiO2 nanocomposite as nanofiller for strengthening of mechanical and thermal properties of poly(vinyl alcohol) nanocomposite films
Abstract
The present investigation reports the preparation and characterization of the thermally stable poly(vinyl alcohol)/(poly(amide-imide)-SiO2) nanocomposite (PVA/PAI-SiO2 NC) films. For this reason, the surface of SiO2 nanoparticles (NPs) was modified with N-trimellitylimido-l-methionine and subsequently, 5 wt.% of modified SiO2 NPs were dispersed in the PAI matrix via sonochemical reaction. The resulting NC was studied by different techniques.
Novel nanocomposites of poly (vinyl alcohol) and Mg–Al layered double hydroxide intercalated with diacid N-tetrabromophthaloyl-aspartic
Abstract
In this work, organic diacid was synthesized from tetrabromophthalic anhydrides and l-aspartic acid in refluxed acetic acid at the presence of pyridine. The interlayer basal spacing of LDH was modified with organic diacid via co-precipitation method using ultrasonic irradiation. The intercalated Mg–Al LDH (mLDH) materials showed an increase in interlayer distance as compared to the unmodified Mg–Al LDH by X-ray diffraction. Transmission electron microscopy images showed plate-like nature for intercalated diacid LDH.
The fabrication and characterization of nanocomposites containing new poly(amide–imide) based on 4,4-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) and carboxylic acid-functionalized multiwalled carbon nanotubes
Abstract
In this article, a nanostructure poly(amide–imide) (PAI) was prepared from the polymerization of 4,4′-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) with 3,5-diamino-N-(4-hydroxyphenyl)benzamide using tetra-n-butylammonium bromide as a green media and triphenylphosphite as a condensing agent. This methodology is safe and green since toxic and volatile organic solvents were eliminated. To obtain a homogeneous dispersion of multiwalled carbon nanotubes (MWCNTs) in the PAI matrix, carboxyl-modified MWCNT (CA-MWCNT) was used.
Novel poly (N-vinyl-2-pyrrolidone) nanocomposites containing poly (amide–imide)/aluminum oxide nanostructure hybrid as a filler
Abstract
In this work, the physicochemical properties of poly(N-vinyl-2-pyrrolidone) (PVP) reinforced with the poly(amide–imide)/alumina nanocomposite (PAN) under sonochemical treatment were studied. In the process of manufacturing PAN, the surface of alumina nanoparticles was grafted with 15 wt% of the bioactive dicarboxylic acid based on amino acid, and an amount of 10 wt% of this modified nanoparticle was loaded into the poly(amide–imide) using some powerful ultrasound irradiation.