The ice nucleation characteristics of montmorillonite mineral dust aerosols with and without exposure to ammonia gas were measured at different atmospheric temperatures and relative humidities with a continuous flow diffusion chamber. The montmorillonite particles were exposed to pure (100%) and diluted ammonia gas (25 ppm) at room temperature in a stainless steel chamber. There was no signific...

The focuses of this study were to investigate the effect of sodium montmorillonite clay (MMT-Na) content on the physical properties and extent of enzymatic hydrolysis Polyvinyl Alcohol (PVA): Starch (S): Carboxymethyl Cellulose (CMC) nanocomposites using enzyme -amylase. The results of this work have revealed that films with MMT-Na content at 5 wt% exhibited a significantly reduced rate ...

The negative electrical field around clay particles whose edge thickness is small relative to the Debye length of the diffuse double layer associated with the planar surfaces may spill over into the edge region. Such a spillover may affect B adsorption by the clay. This study was conducted to determine the effect of edge surface properties of 2:1 clay on B adsorption. Pyrophyllite, which shows ...

The paper presents the results of studying frequency dependence real and imaginary parts dielectric constant polypropylene modified with Na+ montmorillonite. Using experimental values complex constant, optical functions such as refractive index, conductivity, reflection absorption coefficients, characteristic function electron energy losses PP+x vol% montmorillonite composites have been determi...

The preparation of a high-strength and highly transparent nacre-like nanocomposite via layer-by-layer assembly technique from poly(vinyl alcohol) (PVA) and Na+-montmorillonite clay nanosheets is reported in this article. We show that a high density of weak bonding interactions between the polymer and the clay particles: hydrogen, dipole-induced dipole, and van der Waals undergoing break-reform ...

Coconut fatty acid diethanolamine (cocamide-DEA (CDEA)), CH3(CH2)16CON(CH2CH2OH)2 was intercalated into montmorillonite using both solution and solid-state reaction methods. In a typical process, the CDEA aqueous mixed with (Kunipia-F) suspension, which resulted in CDEA–montmorillonite layer complex basal spacing of 13.8 Å. A also easily prepared by solid–solid method. mixture Na–montmorillonit...

-Exchange reactions of Na-montmorillonite with zirconyl chloride solutions give products with basal spacings near 18 A which are stable to 500~ and have surface areas of the order of 300-400 m2/g. The Na ions are exchanged with tetrameric hydroxy cations [Zr4(OH)I( nH~O] 2+. The high surface area is attributed to the porosity formed by stable zirconium oxide" pillars" formed by dehydroxylatlon ...

Polyvinyl chloride (PVC)/organic-montmorillonite composites were prepared by melt intercalation. Their structures and properties were investigated with X-ray diffraction (XRD), differential scanning calorimetry (DSC) and mechanical testing. The results showed that PVC chains could be intercalated into the gallery of organically modified montmorillonite to form exfoliated PVC/organic-montmorillo...

Aqueous suspensions of exfoliated Li0 .25MoO 3 and Na-montmorillonite have been combined and dried to form interstratified solids. X-ray diffraction patterns of ethylene glycol treated films show that the d-spacing of restacked materials varies with composition between the limits established by the two end members. Based on these data, we conclude that the new materials are composed of individu...