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In this work, we use Langmuir film-balance techniques and high resolution Brewster angle microscopy (BAM) to investigate the surface activity of graphene oxide (GO) at the air-water interface. We focus on GO loading efficiency and packing at the air-water interface. We position two Wilhelmy plate tensiometers in different locations to simultaneously measure anisotropic forces as well as spatial inhomogenities...
Aqueous reduction of graphene oxide is a low energy and hazardous-chemical free method to produce graphene. In this article, we report the first polymer nanocomposites with aqueous reduced graphene (ARG). Dispersion of ARG in polymer can be challenging because of the aggregation and stacking of single sheets during the removal of water. A novel co-solvent process to blend ARG into thermoplastic polyurethane...
Motivated by a need for synthetic clays that can be dispersed and exfoliated in polymer melts without added compatibilizers, lamellar mesostructured silicates and aluminosilicates with covalently attached hexadecyl functional groups (C 16 -LMS and C 16 -LMAS, respectively) were prepared by sol–gel syntheses and their structures were characterized. Based on XRD and TEM data, lamellar...
Layered mesostructured silicates and aluminosilicates with covalently attached hexadecyl groups (denoted as C 16 -LMS, C 16 -LMAS, and a sample with layers whose thickness was increased by additional silicate, C 16 -SiO 2 -LMAS) were investigated as synthetic clays for dispersion and exfoliation in polymer melts. The dispersion of these clays in 13 organic solvents...
Polyurethane (PU)/montmorillonite (MMT) nanocomposites were synthesized with organically modified layered silicates (organoclays) by in situ polymerization and foams were prepared by a batch process. Clay dispersion of polyurethane nanocomposites was investigated by X-ray diffraction and transmission electron microscopy. The morphology and properties of PU nanocomposites and foams greatly depend on...
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