Improving interfacial interaction of l‐phenylalanine‐functionalized graphene nanofiller and poly (vinyl alcohol) nanocomposites for obtaining significant membrane properties: Morphology, thermal, and mechanical studies

Abstract

In polymer nanocomposite synthesis, the challenges are achieving well dispersion of nanofiller and its maximum interfacial interaction with polymer matrix at low loading percent. In this study, the preparation of poly (vinyl alcohol) (PVA) nanocomposites with l‐phenylalanine‐functionalized graphene (f‐graphene) using a simple water solution processing method is reported. Graphene layers were functionalized with l‐phenylalanine amino acid as a biocompatible and environmentally friendly modifier.

Application of CuO nanoparticles modified with vitamin B1 for the production of poly (vinyl alcohol)/CuO nanocomposite films with enhanced optical, thermal and mechanical properties

Abstract

In this Investigation, the CuO nanoparticles (NPs) were treated by vitamin B1 as a biomolecule modifier. The CuO NPs were used as an appropriate filler for fabrication of poly(vinyl alcohol) (PVA) nanocomposites (NCs). Then, NCs with various ratios (3, 5, and 7wt%) of modified CuO were fabricated under ultrasonic irradiation and their properties were compared with pure PVA. Several techniques were used for characterization of NCs.

Biosafe organic diacid intercalated LDH/PVC nanocomposites versus pure LDH and organic diacid intercalated LDH: Synthesis, characterization and removal behaviour of Cd2+ from aqueous test solution

Abstract

Highly real nanostructured clay adsorbents of layered double hydroxide(LDH) intercalated with biosafe and anionic organic diacid was produced at a constant pH with the coprecipitation method. XRD results disclosed that organic anionic segment is horizontally oriented in the interlayer space, which is obvious from developed basal spacing of 0.76 to 1.36 nm. Also, a successfully LDH intercalation with examined biosafe diacid was observed using FT-IR and TGA analysis.

Preparation and Evaluation of Edge Selective Sulfonated Graphene by Chlorosulfuric Acid as an Active Metal‐Free Electrocatalyst for Oxygen Reduction Reaction in Alkaline Media

Abstract

In this work, development of efficient metal‐free electrocatalyst for the application in the cathode of fuel cell was investigated by a modified graphene (edge‐selective sulfonated graphene), which was synthesized via a facile chemical procedure. Below, the delamination of three‐dimensional architectures graphite into two‐dimensional graphene nanoplates and the presence of sulfonic acid groups in sulfonated graphene (SG) are revealed by Fourier transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS) techniques.

Use of vitamin B1 for the surface treatment of silica (SiO2) and synthesis of poly (vinyl chloride)/SiO2 nanocomposites with advanced properties

Abstract

In this study, silica (SiO2) nanoparticles (NP)s were used as fillers for the preparation of nanocomposite (NC) films. SiO2 NPs have a strong tendency to agglomerate. Therefore, the surface modification of SiO2 NPs was performed by vitamin B1 (VB1) as a biodegradable modifier. To obtain better dispersion into the polymer matrix, the process was accomplished under ultrasonic as a green route.

Ultrasonic-assisted fabrication and characterization of PVC-SiO2 nanocomposites having bovine serum albumin as a bio coupling agent

Abstract

In this work, SiO2 nanoparticles (NPs) were modified with bovine serum albumin (BSA) under ultrasound irradiations as a green and fast route to achieve their good dispersion. Subsequently, different weight percentages of the modified NPs (3, 6, and 9 wt%) were incorporated in poly(vinyl chloride) (PVC) as the matrix. Thermogravimetric analysis of the SiO2-BSA NPs indicated that 12 wt% of the modifier was loaded on the surface of SiO2 NPs.

Ultrasonic-assisted fabrication and characterization of PVC-SiO2 nanocomposites having bovine serum albumin as a bio coupling agent

Abstract

The present paper represents a simple and efficient technique via ultrasonic irradiation, which utilized for chemical treatment of carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) with Thiamine (Tm). Poly(vinyl chloride) (PVC) based nanocomposites (NC)s were prepared by the incorporation of various amounts of modified MWCNTs (4, 8, and 12 wt%) within the PVC matrix by blending solution and ultrasonic distribution methods.

Ultrasonic-assisted biosurface modification of multi-walled carbon nanotubes with thiamine and its influence on the properties of PVC/Tm-MWCNTs nanocomposite Films

Abstract

The present paper represents a simple and efficient technique via ultrasonic irradiation, which utilized for chemical treatment of carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) with Thiamine (Tm). Poly(vinyl chloride) (PVC) based nanocomposites (NC)s were prepared by the incorporation of various amounts of modified MWCNTs (4, 8, and 12 wt%) within the PVC matrix by blending solution and ultrasonic distribution methods.

Facile and green methodology for surface‐grafted Al2O3 nanoparticles with biocompatible molecules: preparation of the poly (vinyl alcohol)@ poly (vinyl pyrrolidone) nanocomposites

Abstract

The present work describes preparation of modified alumina with biocompatible, water soluble, and treating agents such as citric acid and ascorbic acid. Also, the influence of the modified nanoparticles (NPs) into the blend of poly(vinyl alcohol)@poly(vinyl pyrrolidone) (50/50) matrix was studied. At first, citric acid and ascorbic acid as environmental friendly agents were grafted on the surface of Al2O3 NPs.