The role of nanoparticles (NPs) in the enhancement of thermal, wettability and adsorption properties of chitosan (CS) was inspired by loading of CaCO3 modified with diacid (DA) based on L- phenyl aniline (2–8 wt%) within the CS by ultrasound agitation. The diameter of CaCO3-DA into the CS extended from 40 to 70 nm.
This study deals with the effect of α-MnO2-PVA as filler for improving the optical, mechanical, thermal, adsorption capacity and self-extinguishing properties of poly(vinyl chloride) (PVC) matrix. Therefore, α-MnO2 nanorods were obtained successfully by a hydrothermal method and were modified with poly(vinyl alcohol) (PVA) to increase compatibility of α-MnO2 with the organic PVC matrix and reduce the accumulation.
Incorporation of SiO2 nanoparticles (NPs) into poly(vinyl chloride) (PVC) matrix to prepare PVC/SiO2 nanocomposites (NCs) can enhance its properties. To achieve improved properties for the NCs, NPs should be dispersed properly and be compatible within the polymer matrix. Therefore, to prevent SiO2 NPs from aggregation, surface modification of NPs was performed by citric acid (CA) and l(+)-ascorbic acid (AA) as biological and environmental friendly coating layers for the first time.
Carbon nanotubes (CNTs) are difficult to be dispersed into a polymer matrix. For effective reinforcement, the strong interfacial interaction between nanotubes and the matrix is essential to donate the efficient thermal transfer from the matrix to nanotubes. In this study, multiwalled carbon nanotubes (MWCNTs) were modified with glucose and fructose carbohydrates as biomolecules to obtain Gl-MWCNTs and Fr-MWCNTs. Good water solubilization of MWCNTs was obtained, and these hybrids were expected to be biocompatible.
Alpha manganese dioxide nanorods (α-MnO2) were successfully functionalized with stearic acid (SA) by solvothermal method to prevent agglomeration. The α-MnO2-SA nanorods were employed as a filler for the preparation of poly(vinyl chloride) (PVC) nanocomposite (NC) films with different percentages (1, 3 and 5 wt%). The morphology, mechanical and thermal properties of the obtained NCs were investigated. The results showed that α-MnO2-SA can effectively improve the properties of PVC.
In this contribution, novel nano-adsorbent, triazinyl-β-cyclodextrin modified magnetic nanoparticles (T-β-CD–MNPs) were fabricated for the removal of heavy metal ions from aqueous solutions by reacting mono-chlorotriazinyl-β-cyclodextrin (T-β-CD) with magnetite Fe3O4 nanoparticles (MNPs) via the nucleophilic substitution of the chloride leaving group of T-β-CD by the attacking hydroxyl group of the MNPs.
The α-manganese dioxide (α-MnO2) nanorods were synthesized via a hydrothermal method and modified with γ-aminopropyltriethoxy silane (KH550) coupling agent as a surface modifier. Then poly(vinyl alcohol)/α-MnO2-KH550 nanocomposites (NCs) containing 1, 3, and 5 wt% of modified α-MnO2 were prepared through ultrasound-assisted technique.
In this investigation, citric acid (CA) and ascorbic acid (AA) as biocompatible and biodegradable coupling agents were grafted onto surface of Al2O3 nanoparticles (NP)s via ultrasonic process. Then, various percentages of the modified Al2O3 NP were immobilized onto matrix of pristine poly(vinyl alcohol) (PVA) and ameliorated their morphology, mechanical and thermal properties.
The surface of CuO nanoparticles (NPs) was modified by citric acid and vitamin C to improve their dispersion in the poly(vinyl alcohol) (PVA) matrix. Then, a series of PVA/modified CuO nanocomposites (NCs) were prepared using solution casting technique. These processes were performed under ultrasonic irradiation as a rapid and simple route.
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).