composition of thickening materials

Development of Shear Thickening Material - IOPscience

On the basis, the effects of disperse phase, high polymer weight and composition on the thickening properties were discussed. The application field of shear thickening materials was reviewed, and the direction of potential research value was pointed out. 1. Introduction. As new materials, shear thickening materials include...

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Design and Manufacturing of a Novel Shear Thickening Fluid ...

Indeed, the intrinsic layered nature of composite materials allows the embodiment of specific hybrid plies within the stacking sequence that can be exploited to increase impact resistance and damping of the entire structure without dramatic weight increase. This work is based on the development of an impact-resistant...

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Thickening agent - Wikipedia

Thickening agents are often regulated as food additives and as cosmetics and personal hygiene product ingredients. Some thickening agents are gelling agents (gellants), forming a gel, dissolving in the liquid phase as a colloid mixture that forms a weakly cohesive internal structure. Others act as mechanical thixotropic...

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Dilatant - Wikipedia

A dilatant (also termed shear thickening) material is one in which viscosity increases with the rate of shear strain. Such a shear thickening fluid, also known by the initialism STF, is an example of a non-Newtonian fluid. This behaviour is usually not observed in pure materials, but can occur in suspensions. Shear rate vs.

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Composition – Property Relations in Shear Thickening Fluids

It was shown that fumed silica particles (FS), dispersed in polypropylene glycol (PPG), form shear thickening fluids (STF). PPGs with different molar mass were tested. The best combination of the properties (high viscosity, obtained at high shear rate) present the fluids composed of 7 nm FS and PPG 425. The highest volume...

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WO1981000874A1 - Shear thickening fluid - Google Patents

GB471637A * 1935-10-07 1937-09-08 Bataafsche Petroleum A process for impermeabilising, tightening or consolidating the ground and other earthy and stony masses. US3259572A * 1960-08-04 1966-07-05 Petrolite Corp Drilling fluid. US3145774A * 1963-01-17 1964-08-25 Socony Mobil Oil Co Inc Cement for wells.

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Shear thickening in colloidal dispersions - Semantic Scholar

In a three dimensional flow there are six shearing and three normal components of stress tensor, (Figure 1b). ... We can see that in a simple shear diagonal components of shear tensor are equal to zero, because velocity ..... British company d3o Lab developed shear thickening material for use in protection purposes [19].

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Review on shear thickening fluids and applications - Research Online

Recently, research in the area of shear thickening fluids (STFs) has increased due to the potential for commercial ... of shear thickening mechanisms, ingredient materials, fabrication methods, rheological properties, and factors influencing shear ... Shear Thickening Fluids; Rheological Properties; Smart Structure;. Viscosity...

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WO2013158510A1 - Starch based dilatant composition - Google ...

There is provided a novel adhesive shear thickening dilatant fluid and process for the formation thereof comprising the sequential steps of adding to a gel comprising starch and water and adding thereto a sufficient portion of dry solid material, suitably a starch, to form a kneadable solid which is dry to the touch. In particular...

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Effect of SiO2 particle size and length of polypropylene glycol) chain ...

of them has not been yet precisely studied. The detailed characterization of materials is necessary for optimization of suitable composition of STF depending on the applications. Based on literature review, a few mechanisms of shear thickening are known. This phenomenon can be interpreted by order – disorder transition...

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Divergent Shear Thinning and Shear Thickening Behavior of ...

Jan 1, 2011 ... The divergent steady shear behavior—shear thinning versus shear thickening—of samples with identical structure but different cross-linker dynamics (J. Phys. Chem. .... Details regarding the concentration regimes of the PVP/DMSO solutions and PVP/DMF solutions are provided in the supporting material.

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The Technology - Zoombang

Sep 9, 2013 ... Engineered Polymer, Shear Thickening, Viscoelastic material. ... There are several factors that we control and combine to achieve our goal: The type of polymer we use, its viscosity and its composition, the type of ... The polymer in Zoombang® padding is also referred to as a Shear Thickening substance.

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Rheological Characterization - IntechOpen

Mar 14, 2012 ... Like for the pseudoplastic fluids the stress duration has no influence, i.e. when the material is disturbed or the structure destroyed it will not go back to its previous state. Some examples of shear thickening behaviour are honey, cement and ceramic suspensions. 2.5.4 Thixotropic fluids. Thixotropic fluids are...

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Teacher's Guide - American Chemical Society

D3O® is an effective knee and elbow pad material because it is a shear-thickening fluid that flows easily under normal conditions and becomes more viscous when .... properties of Silly Putty and provides the experimental procedure for making a non-Newtonian bouncing polymer with a composition similar to Silly Putty.

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Rheological behavior - Soft-Matter

Sep 14, 2009 ... alt text. -> Nice graph that summarized all the different types of flows from "Chemical and Functional Properties of Food Components" (By Zdzisław E. Sikorski)p.185 ... Dilatant: These materials are also called shear thickening, since their viscosity increases as more shear stress is applied. A classic example...

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Effect of SiO2 Particle Size and Length of Poly (Propylene Glycol ...

of them has not been yet precisely studied. The detailed characterization of materials is necessary for optimization of suitable composition of STF depending on the applications. Based on literature review, a few mechanisms of shear thickening are known. This phenomenon can be interpreted by order – disorder transition...

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US20090324927A1 - Energy Absorbing Material - Google Patents

By a shear thickening material or dilatant, we mean a material which viscously flows at low rates of deformation but, at an elevated rate of deformation, undergoes .... The composite of the invention may include components other than the dilatant and fluid, e.g., fibrous and/or particular fillers, plasticisers, lubricants, extenders,...

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Liquid Body Armor - The Dartmouth Undergraduate Journal of Science

Nov 19, 2013 ... Thus, efforts are underway to develop more protective and reliable body armor. Researchers at the United States Army Research Laboratory recently developed shear thickening fluid (STF), a lightweight and flexible protective material that can do the work of its heavier and bulkier conventional counterparts...

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Synthesis of Shear Thickening Fluid Using Sonochemical Method

apparent viscosity when the applied shear rate is increased. The Shear. Thickening Fluid (STF) is composed of hard metal oxide particles such as silica suspended in a polyethylene glycol liquid. The combination of flowable and hard components at a particular composition, results in a material with unusual properties.

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Understanding Rheology of Structured Fluids - TA Instruments

region disappears completely, the material is yielding. Some materials show after the shear thinning region with increasing rate or stress, an increase of the viscosity, usually due to structure rearrangements as a result of the applied shear. This is referred to as flow induced shear thickening. Characteristic flow parameters...

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Synthesis of Shear Thickening Fluid Using Sonochemical Method

apparent viscosity when the applied shear rate is increased. The Shear. Thickening Fluid (STF) is composed of hard metal oxide particles such as silica suspended in a polyethylene glycol liquid. The combination of flowable and hard components at a particular composition, results in a material with unusual properties.

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Understanding Rheology of Structured Fluids - TA Instruments

region disappears completely, the material is yielding. Some materials show after the shear thinning region with increasing rate or stress, an increase of the viscosity, usually due to structure rearrangements as a result of the applied shear. This is referred to as flow induced shear thickening. Characteristic flow parameters...

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Hydraulic Fracturing Fluids - Composition and Additives

The current practice for hydraulic fracturing treatments of shale gas reservoirs is to apply a sequenced pumping event in which millions of gallons of water-based fracturing fluids mixed with proppant materials and thickening agents are pumped in a controlled and monitored manner into the target shale formation above...

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Eric Brown lab - Shear thickening fluids

Suspensions can be designed with different particles and liquids to produce various useful material properties. One such property is ... We have identified several connections between shear thickening and the jamming transition, where particles are packed just tightly enough to form a rigid structure. We found the strength...

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Smart Viscous Dampers utilizing Shear Thickening Fluids with Silica ...

magneto rheological dampers (MR dampers ) are well known adjustable damper systems, but the durability and the stability of the external power supply needed for ER and MR dampers are questionable for the long-term application during structure service life. Consequently, a new material, shear thickening fluids (STF),...

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rheology

Feb 9, 2018 ... Comparison of Newtonian, shear-thinning and shear-thickening fluids. With Newtonian fluids (typically water and solutions containing only low molecular mass material) the viscosity is independent of shear strain rate and a plot of shear strain rate (for example, the rate of stirring) against shear stress (for...

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The mechanism of shear thickening fluid with nanoparticles applied ...

From our results, it is possible to interpret the occurrence of shear thickening behavior in terms of the shear-induced structure of the suspension once the critical shear strain is reached. The shear -induced structure can only be obtained for the suspension system with intensive hydrogen bonding within the system.

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Flow Properties of Polymers - Polymer Database

Most polymer solutions and melts exhibit shear thinning, that is, they belong to the class of pseudoplastic materials, whereas shear-thickening or dilatant ... The solid-like behavior at low shear stress can be explained by the formation of a silica network structure arising from attractive particle-particle interactions due to...

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Microstructure and rheology relationships for shear thickening ...

Mar 16, 2015 ... The thermodynamic and hydrodynamic components of the stress that drive shear thinning, shear thickening and first normal stress differences are separately defined via stress-SANS rules and compared to the rheological behaviour of the dispersion during steady shear. Observations of shear-induced...

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Modification and integration of shear thickening fluids into high ...

Jan 1, 2011 ... Chemical compositions and microscopic structures were analyzed with Fourier Transform Infrared Spectroscopy, Scanning Electron. Microscopy and Energy Dispersive Spectroscopy. The current study demonstrated the importance of incorporating Shear Thickening Fluid into woven high performance...

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Tunable shear thickening in suspensions - PNAS

Sep 27, 2016 ... rheology | colloidal suspensions | shear thickening | flow control. The viscosity of a ..... Further details and characterization of experimental sample can be found in Materials and Methods and SI Appendix. Lin et al. ..... ϕ ≈ 0.59 is determined by directly imaging the suspension structure with a confocal...

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Neointimal thickening after stent delivery of paclitaxel: change in ...

The purpose of this study was to determine long-term effects of stent-based paclitaxel delivery on amount, rate and composition of neointimal thickening after stent ... adverse and exaggerated tissue responses to materials bound to stents and brevity of contact between many delivered agents and target vascular tissue.

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Rheology and microstructure of shear thickening fluid suspoemulsions

The blend is studied as a function of composition where phase inversion is evident at low shear ... persed droplet morphologies in this mixture are shown to result from the underlying shear thickening rheology of the dis- persed phase. Key words: .... tant materials, J. Appl. Biomech., submitted (2014). [25] Utracki LA: On the...

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Shear-Thickening Fluids in Biologically Relevant Agents ... - UCL

the literature surrounding biologically or cryobiologically compatible shear thickening fluids is less well understood. ... studies and uses of shear thickening materials are to be found in industrial applications with the literature ..... deformability, composition, or deviations from the spherical on the particle surfaces [29]. As can...

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The relationship between rheological response and material structure

composition. In turn, the flow behaviour of these products is controlled by their microstructure - the way in which the constituent colloidal particles interact and self-assemble. Physicochemical ... 2) for quality control of raw materials, final products, and manufacturing processes such as .... Low viscosity. Shear thickening fluid...

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the choice of the thickener - a way to improve the cosmetics sensory

Feb 12, 2007 ... viscosity regulation as in the case ofi cleansing materials appear. Moreover in these compositions dififierent sun protection ingredients must be included as well as sofit- ening agents as dififierent oily plant extracts. So, it is important to fiollow the dependence ofi the composition rheological parameters on...

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Aqueous high viscosity liquid dishwasher compositions - Lever ...

Jul 4, 1981 ... The composition contains a natural, biopolymeric or synthetic gum thickener and a polyhydric alcohol and urea for viscosity and flow control. Inventors: .... No compositions are mentioned for use as dishwasher detergents, and the composition which is closest in proportion (but not in materials) to the instant...

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Tame your Oobleck: Researcher able to control thickening - Phys.org

Sep 14, 2016 ... Shear thickening – the increase of a liquid's viscosity through applied force – is a well-known phenomenon. ... professor Michael Cates from the Centre for Mathematical Sciences at the University of Cambridge, England – devised a method to adjust on demand the flowability of a thickening material.

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Rheology | Coconut Handbook

To do so, an oscillating shear, with amplitude low enough to study an unbroken structure, is applied to the material. A sheared flow occurs between parallel planes ... For time-independent Non-Newtonian materials, flow behaviour can be classified as shear-thinning, shear-thickening and plastic. While materials that are time...

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Thixotropic behavior of cement-based materials - Iowa State ...

It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact digirep@iastate.edu. Recommended Citation. Quanji, Zhuojun, "Thixotropic behavior of cement-based materials: effect of clay and cement...

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