Wall vibrations and yield stress–shear thinning coupling (small vibrational inertia)

Piau, Monique; Piau, Jean‐Michel

doi:10.1016/j.jnnfm.2007.03.001

Cited by 21 publications

(45 citation statements)

References 8 publications

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“…The experimentally found scaling of the hysteresis losses allows a comparison of our flow curves with previous experimental results, which revealed no apparent hysteresis and time dependence, see Refs. [4][5]. Indeed, one can easily note that, corresponding to large values of t 0 ("slow" forcing), the hysteresis area becomes vanishingly small and our flow curves reduce to the steady state data published by others.…”

Section: The Solid-fluid Transition Upon a Increasing/decreasing Strementioning

confidence: 53%

“…A first major concern for the rheological measurements was the occurrence of the wall slip phenomenon at the contact with the measuring geometry, which has been previously observed with Carbopol gels, [4]. To prevent this, a home-made parallel plate geometry with cleated surfaces has been used, Fig.…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

“…This is mainly due to practical difficulties in visualizing the gel microstructure without altering it, [4]. A toy model using no explicit assumptions on the small-scale dynamics of the gel network under shear is presented in the following.…”

Section: A Toy Model For the Solid-fluid Transitionmentioning

confidence: 99%

“…A detailed discussion of the technical issues that affect the yield stress measurements has been recently presented by Piau in Ref. [4].…”

Section: Introductionmentioning

confidence: 99%

“…The present paper investigates the yielding of a physical gel with a particular focus on the nature and mechanism of the transition between solid and fluid states when the external forcing is gradually increased. Whereas most of the previous investigations of the yielding phenomenon we are aware of ( [4][5][6][7][8] and many others) focused on steady state rheological measurements, this report aims to characterize the yielding process as a function of the degree of flow steadiness. Thus, the description of a steady state yielding process is not the primary goal of this work and can only be obtained via extrapolation of our results.…”

Section: Introductionmentioning

confidence: 99%

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The solid–fluid transition in a yield stress shear thinning physical gel

Pütz

Burghelea²

2009

Rheol Acta

113

154

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Section: The Solid-fluid Transition Upon a Increasing/decreasing Strementioning

confidence: 53%

Section: Experimental Setup and Methodsmentioning

confidence: 99%

Section: A Toy Model For the Solid-fluid Transitionmentioning

confidence: 99%

“…A detailed discussion of the technical issues that affect the yield stress measurements has been recently presented by Piau in Ref. [4].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The solid–fluid transition in a yield stress shear thinning physical gel

Pütz

Burghelea²

2009

Rheol Acta

113

154

View full text Add to dashboard Cite

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Rheology of Industrially Relevant Microgels

Stokes

2011

Microgel Suspensions

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Microgels are currently used in a broad range of industrial applications and consumer products, including surface coatings, paints, inks, oil recovery, controlled drug delivery, cosmetics, personal care, home care, food, and pharmaceuticals. An essential feature in many of these applications is the rheology of the microgel suspension during processing, storage, and transport, as well as during the application process itself (i.e., at the in-use or end-use stage). Microgel suspensions have a long history of use for rheological control due to their ability to swell in a suitable solvent to give increased viscosity and/or a gel-like consistency. Starches, which are essentially cross-linked carbohydrate polymers, are probably the oldest example of a microgel; they were separated from grains by the ancient Greeks for a variety of uses including foods, adhesives, and even wound healing, where the latter was achieved by mixing with saliva to form a honey-like coating [1].The attraction of microgel suspensions in industrial applications is that their rheology can be controlled to meet the requirements for specific applications by varying composition, cross-link density, particle size, shape, surface properties, and solvent quality. A useful feature of microgels is their responsive nature to their environment; they can swell or deswell by altering solvent quality (through pH, temperature, ions, etc.), thus altering their effective phase volume and consequently the rheological properties of the suspension. The deformable and swellable nature of microgels allows a higher phase volume to be obtained compared to hard spheres of equivalent size. Their deformability also affects their response in shear flow due to their ability to change shape in response to perturbation, particularly at high volume fractions. The composition of microgels can be adapted and customized according to the application, and the microgel additives used have been made out of a wide variety of polymeric materials including natural or modified biopolymer-based components (e.g., polysaccharides, proteins, and starches), and synthesized components such as polyacrylates, poly(styrene sulfonates), poly(vinyl pyridine), and polyurethanes. Microgel Suspensions: Fundamentals and ApplicationsEdited

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From Shape to Function: The Next Step in Bioprinting

et al. 2020

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In 2013, the “biofabrication window” was introduced to reflect the processing challenge for the fields of biofabrication and bioprinting. At that time, the lack of printable materials that could serve as cell‐laden bioinks, as well as the limitations of printing and assembly methods, presented a major constraint. However, recent developments have now resulted in the availability of a plethora of bioinks, new printing approaches, and the technological advancement of established techniques. Nevertheless, it remains largely unknown which materials and technical parameters are essential for the fabrication of intrinsically hierarchical cell–material constructs that truly mimic biologically functional tissue. In order to achieve this, it is urged that the field now shift its focus from materials and technologies toward the biological development of the resulting constructs. Therefore, herein, the recent material and technological advances since the introduction of the biofabrication window are briefly summarized, i.e., approaches how to generate shape, to then focus the discussion on how to acquire the biological function within this context. In particular, a vision of how biological function can evolve from the possibility to determine shape is outlined.

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Wall vibrations and yield stress–shear thinning coupling (small vibrational inertia)

Cited by 21 publications

References 8 publications

The solid–fluid transition in a yield stress shear thinning physical gel

The solid–fluid transition in a yield stress shear thinning physical gel

Rheology of Industrially Relevant Microgels

From Shape to Function: The Next Step in Bioprinting

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