In this work, nanocomposite (NC) hydrogels based on polyacrylamide/chromium triacetate were prepared at different reaction mixture (gelant) volumes and their crosslinking process and viscoelastic behaviors were studied. The X-ray diffraction (XRD) patterns taken from the NC hydrogels containing laponite nanoparticles did not show any distinct characteristic basal reflection for all of the NC hy...

We investigate pressure driven pipe flow of Laponite suspension, as a model thixotropic fluid. The tendency the suspension to age is controlled by addition sodium chloride salt vary ionic strength. use syringe pump prescribe and observe that steady state obtained. Unusually, drop required maintain constant rate decreases with an increase in rate, qualitative contrast expectation for Poiseuille ...

Colloidal hybrids comprise organic and inorganic components and are attracting considerable attention in the literature. Recently, we reported hybrid anisotropic microsheets that formed thermoresponsive gels in polymer solutions [Liu et al., Langmuir, 25, 490, 2009]. Here, we investigate the composition and properties of these hybrid colloids themselves in detail for the first time. Three diffe...

In this work, the use of positively charged macromolecular reversible addition-fragmentation chain transfer (RAFT) copolymers (macro-RAFTs) in synthesis Laponite RD-based nanocomposite latex particles is described. For purpose, two different amphiphilic composed 2-(dimethylamino)ethyl methacrylate (DMAEMA) and nbutyl acrylate (BA) units are investigated. first step, macroRAFT adsorbed onto Lapo...

Colloidal dispersions of Laponite platelets are known to age slowly from viscous sols to colloidal glasses. We follow this aging process by monitoring the diffusion of probe particles embedded in the sample via dynamic light scattering. Our results show that the time-dependent diffusion of the probe particles scales with their size at early times and for the larger particles. This implies that ...

Controlling the level of dispersion of silicate layers in polymer matrices through intermolecular interactions and exploiting these interactions to enhance thermomechanical behavior are key challenges in the field of polymer nanocomposites. In this investigation, unmodified Laponite platelets are dispersed in a segmented polyurethane containing a polar, hydrophilic soft segment and a hydrophobi...