Flow-induced alignment of protein nanofibril dispersions

Santos, Tatiana P.; Calabrese, Vincenzo; Boehm, Michael W.; Baier, Stefan K.; Shen, Amy Q.

doi:10.1016/j.jcis.2023.01.105

Cited by 8 publications

(5 citation statements)

References 66 publications

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“…Also represented in Fig. 5, it has been well reported that birefringence generally increases nonlinearly as the shear rate is increased 26,43,48,49 . This trend remains unchanged when organized by invariant, and the increase in birefringence per invariant decreases with decreasing gradient at higher invariants.…”

Section: Resultsmentioning

confidence: 71%

Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer

Worby,

Nakamine,

Yokoyama

et al. 2024

Preprint

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In this study, the concept of rheo-optics is applied that explores the flow birefringence caused by stress components along the optical axis of the camera since it is often overlooked in the traditional theories of photoelastic flow measurement. A novel aspect of this research is that it involved conducting polarization measurements on simple shear flows, specifically from a perspective in which a shear-velocity gradient exists along the camera's optical axis. A parallel-plate-type rheometer and a polarization camera are employed for these systematic measurements. The experimental findings for dilute aqueous cellulose nanocrystal suspensions demonstrates that the flow birefringence can be expressed as a power law based on the power of the second invariant of the deformation-rate tensor. This suggests that flow birefringence can be universally characterized by the coordinate-independent invariants and a pre-factor determined by the direction of polarization measurement. By adjusting the nonlinear term in the stress-optic law, its applicability could be expanded to include three-dimensional fluid stress fields in which the stress is distributed along the camera's optical axis.

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Section: Resultsmentioning

confidence: 71%

Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer

Worby,

Nakamine,

Yokoyama

et al. 2024

Preprint

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“…A similar exponential relationship was shown for monodisperse filamentous viruses by Lang et al using a rheo-SANS setup. , More recently, Calabrese et al, coupling microfluidics with flow-induced birefringence (FIB) could verify the exponential viscosity decay with the increasing extent of particle alignment, in analogy with the studies of Förster et al and Lang et al , Nonetheless, it is unclear to what extent this exponential relationship is a general feature of RC and RP fluids. In other studies, the extent of RC/RP alignment and the resulting shear viscosity have been investigated (via FIB and rheo-scattering) but have not been directly linked. − In the present work we explore the relationship between RC and RP alignment and the resulting rheological properties (alignment–rheology relationship) for a wide variety of naturally derived RC and RP with significantly distinct morphology, length scales, and flexibility. As model biosourced RC, we use cellulose nanocrystals (CNC), TEMPO-oxidized cellulose nanofibrils (OCNF) with two different average contour lengths, and a filamentous virus ( Pseudomonas phage, Pf1).…”

Section: Introductionmentioning

confidence: 99%

“…In other studies, the extent of RC/RP alignment and the resulting shear viscosity have been investigated (via FIB and rheo-scattering) but have not been directly linked. 33 − 38 In the present work we explore the relationship between RC and RP alignment and the resulting rheological properties (alignment–rheology relationship) for a wide variety of naturally derived RC and RP with significantly distinct morphology, length scales, and flexibility. As model biosourced RC, we use cellulose nanocrystals (CNC), TEMPO-oxidized cellulose nanofibrils (OCNF) with two different average contour lengths, and a filamentous virus ( Pseudomonas phage, Pf1).…”

Section: Introductionmentioning

confidence: 99%

Alignment–Rheology Relationship of Biosourced Rod-Like Colloids and Polymers under Flow

et al. 2023

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Fluids composed of biosourced rod-like colloids (RC) and rod-like polymers (RP) have been extensively studied due to various promising applications relying on their flow-induced orientation (e.g., fiber spinning). However, the relationship between RC and RP alignment and the resulting rheological properties is unclear due to experimental challenges. We investigate the alignment−rheology relationship for a variety of biosourced RC and RP, including cellulose-based particles, filamentous viruses, and xanthan gum, by simultaneous measurements of the shear viscosity and fluid anisotropy under rheometric shear flows. For each system, the RC and RP contribution to the fluid viscosity, captured by the specific viscosity η sp , follows a universal trend with the extent of the RC and RP alignment independent of concentration. We further exploit this unique rheological-structural link to retrieve a dimensionless parameter (β) directly proportional to η sp at zero shear rate (η 0,sp ), a parameter often difficult to access from experimental rheometry for RC and RP with relatively long contour lengths. Our results highlight the unique link between the flow-induced structural and rheological changes occurring in RC and RP fluids. We envision that our findings will be relevant in building and testing microstructural constitutive models to predict the flowinduced structural and rheological evolution of fluids containing RC and RP.

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“…We measure the flow-induced birefringence (FIB) of a model sample in a straight microfluidic channel analogous to the one used in our previous studies [244,250,271,274,275]. Briefly, the microfluidic channel has a rectangular cross section with height H = 3 mm and width W = 0.3 mm (Fig.…”

Section: A1 Comparison With Flow-induced Birefringence (Fib) In a She...mentioning

confidence: 99%

“…At each volumetric flow rate Q, the shear rate at y = ±W/4 is calculated assuming a fully developed Newtonian flow as | γ| = 3.38Q/(W 2 H) [274]. Details regarding the FIB measurement in analogous microfluidic platforms are described in prior publications [244,250,271,274,275].…”

Section: A1 Comparison With Flow-induced Birefringence (Fib) In a She...mentioning

confidence: 99%

Plasmonic bubbles in binary liquids

Detert

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These results allow to tune the delay time and size of a vapor bubble by varying the corresponding liquid parameters. We envision that our findings will allow finer bubble control in applications which is particularly promising for medical applications. 32CHAPTER 1. BUBBLE NUCLEATION 2.1. INTRODUCTION 39 2.2. EXPERIMENTAL SETUP AND FINDINGS 41 62 CHAPTER 3. TRANSITION IN GROWTH MODE SUMMARYscaling parameter β used to collapse the viscosity data is proportional to the specific zero-shear viscosity η 0,sp and its scaling with concentration is identical to experimental studies that measured η 0,sp and to theoretical predictions for η 0,sp . Hence, combing birefringence and rheology is a fast, easy to use and comparatively cheap way to measure the scaling of the specific zero-shear viscosity η 0,sp . This is especially promising for RLPs because it can be performed at moderate shear rates ( γ ≈ 1 s −1 ) and therefore allows to measure the scaling for RLPs such as Pf1 where measuring η 0,sp via shear rheology is quite challenging due to the low shear rates required.

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Flow-induced alignment of protein nanofibril dispersions

Cited by 8 publications

References 66 publications

Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer

Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer

Alignment–Rheology Relationship of Biosourced Rod-Like Colloids and Polymers under Flow

Plasmonic bubbles in binary liquids

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