scholarly journals Dry oil powders and oil foams stabilised by fluorinated clay platelet particles

Soft Matter ◽  
2014 ◽  
Vol 10 (4) ◽  
pp. 578-589 ◽  
Author(s):  
Bernard P. Binks ◽  
Tomoko Sekine ◽  
Andrew T. Tyowua
Keyword(s):  
Clay Platelet

Use of Sonication and Influence of Clay Type on the Enhancement in Physical Properties of Poly(methyl methacrylate) Nanocomposites

2007 ◽  
Vol 1056 ◽  
Author(s):  
Sharon Ingram ◽  
Hugh Dennis ◽  
Ian Hunter ◽  
John J Liggat ◽  
Craig McAdam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Methyl Methacrylate ◽  
Physical Properties ◽  
Resin Composite ◽  
Clay Platelet ◽  
Poly Methyl Methacrylate ◽  
Cure Characteristics ◽  
Clay Type

ABSTRACTThe nature of the dispersion of a clay platelet in a resin composite will play an important role in the process of enhancement of the physical properties of that material. This paper describes studies of ultrasonically and mechanically mixed dispersion of various clays in methyl methacrylate (MMA) and reports the effects of organic surface modification on the rheology, suppression of settlement of filled systems, cure characteristics and final mechanical properties.

Effect of clay platelet orientation on spin cast nanocomposite films

2006 ◽  
Vol 89 (11) ◽  
pp. 111917 ◽  
Author(s):  
J. Li ◽  
S. A. Schwarz ◽  
Y. Ji ◽  
M. H. Rafailovich ◽  
J. Sokolov ◽  
...  
Keyword(s):  
Nanocomposite Films ◽  
Clay Platelet

Anisotropic effective‐medium modeling of the elastic properties of shales

Geophysics ◽  
1994 ◽  
Vol 59 (10) ◽  
pp. 1570-1583 ◽  
Author(s):  
Brian E. Hornby ◽  
Larry M. Schwartz ◽  
John A. Hudson
Keyword(s):  
Elastic Properties ◽  
Solid Phase ◽  
Processing Technique ◽  
Effective Medium ◽  
Clay Platelet ◽  
Mineral Components ◽  
Solid Phases ◽  
Anisotropic Elastic ◽  
Two Phases ◽  
New Processing

Shales are complex porous materials, normally consisting of percolating and interpenetrating fluid and solid phases. The solid phase is generally comprised of several mineral components and forms an intricate and anisotropic microstructure. The shape, orientation, and connection of the two phases control the anisotropic elastic properties of the composite solid. We develop a theoretical framework that allows us to predict the effective elastic properties of shales. Its usefulness is demonstrated with numerical modeling and by comparison with established ultrasonic laboratory experiments. The theory is based on a combination of anisotropic formulations of the self‐consistent (SCA) and differential effective‐medium (DEM) approximations. This combination guarantees that both the fluid and solid phases percolate at all porosities. Our modeling of the elastic properties of shales proceeds in four steps. First, we consider the case of an aligned biconnected clay‐fluid composite composed of ellipsoidal inclusions. Anisotropic elastic constants are estimated for a clay‐fluid composite as a function of the fluid‐filled porosity and the aspect ratio of the inclusions. Second, a new processing technique is developed to estimate the distribution of clay platelet orientations from digitized scanning electron microphotographs (SEM). Third, the derived clay platelet distribution is employed to estimate the effective elastic parameters of a solid comprising clay‐fluid composites oriented at different angles. Finally, silt minerals are included in the calculations as isolated spherical inclusions.

Effect of nano-clay platelet on fluorescence resonance energy transfer

2016 ◽  
Vol 6 (3) ◽  
pp. 132
Author(s):  
Syed Arshad Hussain ◽  
Arpan D. Roy ◽  
J. Saha ◽  
Dibyendu Dey ◽  
D. Bhattacharjee
Keyword(s):  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Clay Platelet ◽  
Nano Clay ◽  
Fluorescence Resonance

Effect of Carbon Black Substitution with Raw and Modified Bentonite on the Thermal Aging Resistance of Natural Rubber Composites

2016 ◽  
Vol 705 ◽  
pp. 8-13 ◽  
Author(s):  
Clare L. Garing ◽  
Bryan B. Pajarito
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Thermal Aging ◽  
Clay Platelet ◽  
Aging Resistance ◽  
Contour Plots ◽  
Activated Bentonite ◽  
Simplex Lattice ◽  
Simplex Lattice Mixture Design

The effect of carbon black (CB) substitution with raw (BNT) and modified (M-BNT) bentonite on the thermal aging resistance of natural rubber (NR) composites was investigated in this study. NR composites were prepared at varied proportions of CB, M-BNT, and BNT using a three-component, third degree simplex lattice mixture design of experiment (DOE). M-BNT was produced by modifying sodium-activated bentonite with tetradecyldimethylamine (TDA) salt and cocamide diethanolamine (CDEA). Thermal aging was performed at 70 and 100°C for 168 and 336 h. Substitution of CB with 5 phr M-BNT gave the highest values of tensile properties (modulus and strength) for both unaged and aged samples. This is attributed to the synergistic effect of CB and M-BNT fillers on the tensile properties of NR composites. In terms of property retention (%), composites filled with M-BNT and BNT clay fillers attained the highest values which signified their excellent thermal aging resistance. This observation proves the barrier effect of clay platelet structure which hinders oxygen diffusion in the rubber. Reduced hierarchical models as function of CB, M-BNT, and BNT proportions were used to generate contour plots for tensile properties of NR composites after 168 h of aging at 70 and 100°C.

Distributed Multiscale Simulations of Clay-Polymer Nanocomposites

2012 ◽  
Vol 1470 ◽  
Author(s):  
James Suter ◽  
Derek Groen ◽  
Lara Kabalan ◽  
Peter V. Coveney
Keyword(s):  
Polymer Nanocomposites ◽  
System Size ◽  
Multiscale Simulation ◽  
Coarse Grained ◽  
Mechanical Resistance ◽  
Clay Platelet ◽  
Length Scales ◽  
Molecular Arrangement ◽  
Wide Range ◽  
Clay Platelets

ABSTRACTThe mechanical enhancement of polymers when clay nanoparticles are dispersed within it depends on factors over various length scales; for example, the orientation of the clay platelets in the polymer matrix will affect the mechanical resistance of the composite, while at the shortest scale the molecular arrangement and the adhesion energy of the polymer molecules in the galleries and the vicinity of the clay-polymer interface will also affect the overall mechanical properties.In this paper, we address the challenge of creating a hierarchal multiscale modelling scheme to traverse a sufficiently wide range of time and length scales to simulate clay-polymer nanocomposites effectively. This scheme varies from the electronic structure (to capture the polymer – clay interactions, especially those of the reactive clay edges) through classical atomistic molecular dynamics to coarse-grained models (to capture the long length scale structure).Such a scenario is well suited to distributed computing with each level of the scheme allocated to a suitable computational resource. We describe how the e-infrastructure and tools developed by the MAPPER (Multiscale Applications on European e-Infrastructures) project facilitates our multiscale scheme. Using this new technology, we have simulated clay-polymer systems containing up to several million atoms/particles. This system size is firmly within the mesoscopic regime, containing several clay platelets with the edges of the platelets explicitly resolved. We show preliminary results of a “bottom-up” multiscale simulation of a clay platelet dispersion in poly(ethylene) glycol.

Clay platelet dispersion in a polymer matrix

1996 ◽  
Vol 28 (4-6) ◽  
pp. 379-384 ◽  
Author(s):  
C.D. Muzny ◽  
B.D. Butler ◽  
H.J.M. Hanley ◽  
F. Tsvetkov ◽  
D.G. Peiffer
Keyword(s):  
Polymer Matrix ◽  
Clay Platelet

Preparation, Physical and Mechanical Characterization of Montmorillonite/Polyethylene Nanocomposites

2006 ◽  
Vol 312 ◽  
pp. 205-210 ◽  
Author(s):  
V. Pettarin ◽  
Victor Jayme Roget Rodriguez Pita ◽  
Francisco Rolando Valenzuela-Díaz ◽  
S. Moschiar ◽  
L. Fasce ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Clay Platelet ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

In this paper, we report the preparation of polyethylene composites with organically modified montmorillonite. Three different Na+-montmorillonites were modified in order to obtain organoclays and two grades of high-density polyethylene were used as composite matrices. All composites were prepared by melt blending, and their physical and mechanical properties were thoroughly characterized. The extent of clay platelet exfoliation in the composites was confirmed by X-ray diffraction (XRD). Mechanical properties under static and impact conditions were evaluated to assess the influence of the reinforcement on the properties of polyethylene.

Approximate potential-distance relationship for clays

Soil Research ◽  
1980 ◽  
Vol 18 (4) ◽  
pp. 461 ◽  
Author(s):  
A Sridharan ◽  
MS Jayadeva
Keyword(s):  
Surface Potential ◽  
Clay Platelet ◽  
Conventional Procedure ◽  
Distance Relationship ◽  
New Procedures

The conventional procedure of determining the surface potential of clay platelet and the variation of potential with distance is lengthy and time consuming. Simplified graphical procedures using Gouy theory have been developed and presented. The new procedures are simple, accurate and very much less time consuming.

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