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Showing 1 to 15 of 15 for “"colloidal gel"”.
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Flow properties of a colloidal gel
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Microscopic characterization of macroscopic colloidal gel rheology
… to a few microns suspended in a liquid, form a colloidal gel. The squishiness of a colloidal gel stems from its elastic space-spanning network of aggregated particles in a viscous liquid, which allows the gel to resist deformations like a solid under low stress, but to flow like a liquid under …
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Synthesis, physico-chemical properties and potential applications of colloidal gel particles
… vinyl cinnamate) microgels were deposited on different solid surfaces to produce new environmental responsive surfaces. The mass of microgel particles deposited on glass pre-treated with acid, glass pre-treated with base, quartz, stainless steel, gold and Teflon at 25°C …
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Three dimensionally flocculated proangiogenic microgels for neovascularization
… We hypothesized that a drug-encapsulated colloidal gel formed through colloidal attraction between microparticles would resist displacement at an implant site, and subsequently improve therapeutic efficacy. This hypothesis was examined using a colloidal gel formed from the mixing of …
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Phase Behavior, Structure, and Properties of Colloidal Microsphere-Nanoparticle Mixtures
… of binary mixtures of negligibly charged colloidal microspheres were studied for two size ratios of 95 and 197 at pH = 1.5. In the absence of nanoparticle additions, the system spontaneously assembled into a colloidal gel whose strength increased with microsphere volume fraction. Between a …
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Elucidating Dual Methylcellulose-and-Oil-Nanoemulsion Thermoresponsive Gelation
The rheological properties of a colloidal gel depend upon the microstructure of the gel and the identity of the load-bearing elements. Here we demonstrate a hybrid hydrogel-colloidal gel system composed of a methylcellulose-stabilized oil nanoemulsion. This system has tunable rheology with two …
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Structure, rheology and applications of thermally-gelling nanoemulsions
Colloidal gelation is an effective tool to engineer material properties. Nanoemulsions, liquid-liquid dispersions where the droplet size is on the order of 100 nm, have become an emerging model system for studying aspects of colloidal gel materials. In conventional approaches, the gelation of …
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Taking Magnetic Resonance into Industrial Applications
… insights into the origins and mechanisms of colloidal gel collapse. Many industrial products are colloidal gels, a space-spanning network of attractive particles with a yield stress. Colloidal gels are, however, known to undergo gravitational collapse after a latency period, thus limiting the …
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Superior to one of Glass: Natural Gradient index Lenses via Patchy Particle Self-Assembly
… analysis suggests that lens proteins may form a gel with gradient density throughout the cellular lens structure, with density mediated by a tightly controlled protein coordination number in each region of the organ. Patchy colloid theory may therefore explain both the graded refractive index …
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Suspension, yielding, microstructure and applications of bacterial cellulose dispersion
… to fluid microstructure design is to create a colloidal gel, a self-supported network that forms spontaneously from attractive particles. Fluid products containing colloidal gels have superior suspension abilities, because they possess a yield stress that makes the fluid elastic until a …
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Colloidal microgels as (trans)dermal drug delivery systems
In this study microgels have been used as novel drug carriers (i.e. a novel controlled drug delivery system) for either dermal or transdermal delivery. The experiments conducted in this project were, firstly, to investigate the uptake and release of model compounds with different physico-chemical …
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Hydrodynamic Simulations of Colloidal Gels: Microstructure, Dynamics, and Rheology
The microstructure, dynamics, and rheology of colloidal suspensions with short-range depletion attraction and long-range electrostatic repulsion are studied using equilibrium predictions and a new algorithm for dynamic simulations. A focus is made on those combinations of attraction and repulsion …
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A Confocal Rheology Study of Network Stabilized Bicontinuous Emulsion Gels
… Bicontinuous intraphase jammed emulsion gels (bipjels) were formed from critical mixtures of water and 2,6-lutidine and were stabilized with commercially produced alumina coated silica nanoparticles. Using a novel confocal rheology platform, the microstructure and rheological properties …
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Novel Rheometric Techniques and Constitutive Models for Linear and Nonlinear Rheology: Applications to Polymeric Solutions and Colloidal Gels
… spectra, and mutating material systems such as colloidal gels that may exhibit age-dependent viscoelastic properties. Similarly, characterizing the rheological properties over the full range of time or frequency scales relevant to their use can be challenging, especially if the material …