The surface of titanium dioxide (TiO2) nanoparticles (NPs) was modified by biosafe vitamin B1to prevent their aggregation. Then, it was dispersed into the poly(vinyl alcohol) (PVA) matrix under ultrasonic irradiation and nanocomposite (NC) films were prepared using solution casting technique.
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.
Chitosan-based nanocomposites (NCs) at different modified multiwalled carbon nanotubes (MWCNTs) loadings were produced by solvent casting method. The effective dispersion of the MWCNT in polymer matrix is an important factor while making its NCs. The MWCNTs intrinsically tend to bundle and/or aggregate. For this reason, the MWCNT is modified to improve the dispersibility when incorporated into polymer matrix. In this study, the MWCNTs were modified with ascorbic acid or vitamin C (VC).
In this study, novel nanocomposite films of chitosan with fructose modified multi-walled carbon nanotube were prepared by solution casting technique. The fructose modified multi-walled carbon nanotube and the resulting bionanocomposite films were characterized using thermogravimetric analysis, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, atomic force microscopy and transmission electron microscopy.
Polyvinylpyrrolidone (PVP) is a synthetic polymer with high physiological compatibility, so incorporation a non-toxic nano-fller within the PVP as the polymer matrix to prepare novel nanocomposites (NC)s leads to bio-safe products for different applications. Therefore, silica nanoparticle (SNP) was chosen as an appropriate nano-filer to insert in the PVP matrix. Surface modification of SNPs was performed to prevent them from agglomeration and make them more compatible with the PVP matrix.
Covalent functionalization of MWCNT-COOH with dopamine was conducted by microwave irradiation and the dopamine-functionalized MWCNTs (MWCNT-Dop) were used as fillers in poly(amide-imide) (PAI) to improve its thermal and mechanical properties. Results indicate that the MWCNT-Dop is dispersed in PAI very well, which is ascribed to a good interfacial interaction between the MWCNT-Dop and PAI by hydrogen bonding.
α-MnO2 nanorods have been synthesized through a simple method without the presence of catalysts and templates. The prepared nanorods were employed as fillers to retrofit and increase the mechanical strength, thermal stability and adsorption properties of poly(vinyl chloride) (PVC) as one of the most important thermoplastics. To prevent accumulation and increase compatibility of α-MnO2 with the organic PVC matrix, the nanorods were modified with γ-aminopropyltriethoxy silane (KH550).
Plastics make considerable amount of solid waste in the worldwide corresponding to their use in many fields of our lives like construction, packaging, building, and so on. The manufacture of fuel-derived plastics is often dangerous to the environment; so, available waste administration systems including energy recovery operations and/or recycling are essential to solve this huge pollution.
We prepared nanocomposites (NCs) based on polycaprolactone (PCL) and poly(vinyl alcohol)-modified ZnO, using ultrasound irradiation. First, the surface modification of nanoparticles (NPs) was accomplished, in order to increase the compatibility and dispersity in the polymer matrix. Then PCL composite films containing different amounts of modified NPs were achieved through solvent casting method using dichloromethane as solvent. Transmission electron microscopy images verified the presence of NPs in the polymer matrix.
A thermally stable and optically active poly(amide–ester–imide) (PAEI) was prepared from diol: N,N′-(1,3,5,7-tetraoxo-5,7-dihydropyrrolo[3,4-f]isoindole-2,6-(1H,3H)-diyl)bis-(4-hydroxybenzamide). The structure of the polymer was determined by means of 1H NMR and Fourier transform infrared spectroscopy (FT-IR), elemental analysis; also it was studied with specific rotation technique, X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM).