Rheologica Acta最新文献_第5页

Impact of slurry preparation method on the rheological behaviour of dense anode slurries for lithium-ion batteries 浆料制备方法对锂离子电池致密正极浆料流变特性的影响

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-19 DOI: 10.1007/s00397-024-01440-4

Soichiro Makino, Yusuke Akimoto, Masahiko Ishii, Hiroshi Nakamura

{"title":"Impact of slurry preparation method on the rheological behaviour of dense anode slurries for lithium-ion batteries","authors":"Soichiro Makino, Yusuke Akimoto, Masahiko Ishii, Hiroshi Nakamura","doi":"10.1007/s00397-024-01440-4","DOIUrl":"10.1007/s00397-024-01440-4","url":null,"abstract":"<div>Understanding and controlling the rheology of electrode slurries for lithium-ion batteries is critical both for improving their manufacturing efficiency and for achieving desirable battery performance. Here, we show drastic “slurry-preparation-dependent” rheology in an anode slurry for lithium-ion batteries, focusing on the behaviour of carboxymethyl cellulose (CMC), which is the most popular dispersant for graphite particles in anode slurries. Slurry preparation with dry-state mixing, where water is added to a dry mixture of graphite and CMC powder, results in much higher viscosity, yield stress, and elastic modulus than those achieved with conventional wet-state mixing, where graphite is added to a CMC solution. Cryogenic scanning electron microscopy reveals strange CMC “clumps” formed among the graphite particles in the slurry prepared with dry-state mixing. We attribute the increases in viscosity, yield stress, and elastic modulus for the slurries prepared with dry-state mixing to these clumps of CMC, which can enhance the adhesion between graphite particles and thereby constrain their motion. We also show that pre-shearing irreversibly decreases viscosity, yield stress, and elastic modulus, suggesting that the clumps of CMC are irreparably broken down by applied shear. The influence of the slurry preparation method on the rheological properties of anode slurries has not received attention in previous studies. Hence, we believe that our results might provide new strategies for controlling the rheology of the anode slurry in the manufacturing process for lithium-ion batteries.</div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 4","pages":"319 - 331"},"PeriodicalIF":2.3,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140170118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlling the rheo-electric properties of graphite/carbon black suspensions by ‘flow switching’ 通过 "流动切换 "控制石墨/炭黑悬浮液的流变电特性

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-13 DOI: 10.1007/s00397-024-01439-x

Thomas Larsen, John R. Royer, Fraser H. J. Laidlaw, Wilson C. K. Poon, Tom Larsen, Søren J. Andreasen, Jesper de C. Christiansen

{"title":"Controlling the rheo-electric properties of graphite/carbon black suspensions by ‘flow switching’","authors":"Thomas Larsen, John R. Royer, Fraser H. J. Laidlaw, Wilson C. K. Poon, Tom Larsen, Søren J. Andreasen, Jesper de C. Christiansen","doi":"10.1007/s00397-024-01439-x","DOIUrl":"10.1007/s00397-024-01439-x","url":null,"abstract":"The ability to manipulate rheological and electrical properties of colloidal carbon black gels makes them attractive in composites for energy applications such as batteries and fuel cells, where they conduct electricity and prevent sedimentation of ‘granular’ active components. While it is commonly assumed that granular fillers have a simple additive effect on the composite properties, new phenomena can emerge unexpectedly, with some composites exhibiting a unique rheological bi-stability between high-yield-stress and low-yield-stress states. Here we report such bi-stability in suspensions of non-Brownian graphite and colloidal carbon black in oil, a model system to mimic composite suspensions for energy applications. Steady shear below a critical stress elicits a transition to a persistent mechanically weak and poorly conducting state, which must be ‘rejuvenated’ using high-stress shear to recover a stronger, high-conductivity state. Our findings highlight the highly tunable nature of binary granular/gel composite suspensions and present new possibilities for optimising mixing and processing conditions for Li-ion battery slurries.","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 4","pages":"283 - 289"},"PeriodicalIF":2.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-024-01439-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: A metamodel for confined yield stress flows and parameters’ estimation 更正：约束屈服应力流元模型及参数估计

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-06 DOI: 10.1007/s00397-024-01441-3

Clément Berger, David Coulette, Paul Vigneaux

引用次数: 0

Generalized second-grade fluid flow over a tilted plate with bump topography 带有凹凸地形的倾斜板上的广义二级流体流动

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-02 DOI: 10.1007/s00397-024-01438-y

Mahesh T, Satyananda Panda

引用次数: 0

A metamodel for confined yield stress flows and parameters’ estimation 约束屈服应力流和参数估计的元模型

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-27 DOI: 10.1007/s00397-024-01436-0

Clément Berger, David Coulette, Paul Vigneaux

引用次数: 0

Influence of various pretreatments on molecular and rheological properties of a linear and a long-chain branched polypropylene 各种预处理对线性和长链支化聚丙烯分子和流变特性的影响

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-26 DOI: 10.1007/s00397-024-01437-z

Helmut Münstedt, Joachim Kaschta

{"title":"Influence of various pretreatments on molecular and rheological properties of a linear and a long-chain branched polypropylene","authors":"Helmut Münstedt, Joachim Kaschta","doi":"10.1007/s00397-024-01437-z","DOIUrl":"10.1007/s00397-024-01437-z","url":null,"abstract":"<div>The influence of a mechanical or a thermal pretreatment of a linear (L-PP) and a long-chain branched polypropylene (LCB-PP) in the molten state was studied. The molar mass distributions and the branching structure were determined by high-temperature gel permeation chromatography HT-GPC coupled with laser-light scattering. The samples were extruded through long or short capillaries of various geometries corresponding to a predominant shear or elongational deformation. As a rheological probe, the extrudate swell at low stresses was measured for the differently pretreated samples. For the L-PP, neither molecular nor rheological changes were observed. However, the extrudate swell of the LCB-PP was found to decrease with increasing volume throughput. It was more strongly affected by shear in the capillary than by molecule stretching in the entry region. The smaller extrudate swell was accompanied by a decrease of the high molar mass tail of the LCB-PP, which could be the reason for the decay of swell, in principle. However, a comparable degradation of the high molar mass tail was obtained by a pure thermal treatment that was shown to leave the extrudate swell unchanged. This result and the unaffected branching structures found by high-temperature gel permeation chromatography (HT-GPC) support the hypothesis of a change of the branching topography by the mechanical pretreatment.</div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"241 - 250"},"PeriodicalIF":2.3,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-024-01437-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139969691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frequency response analysis of the Bautista-Manero-Puig model with normal stress: analytical and numerical solution for large amplitudes 具有法向应力的 Bautista-Manero-Puig 模型的频率响应分析：大振幅的分析和数值解法

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-16 DOI: 10.1007/s00397-024-01434-2

E. Hernandez, F. Bautista, J. P. García-Sandoval, O. Manero

{"title":"Frequency response analysis of the Bautista-Manero-Puig model with normal stress: analytical and numerical solution for large amplitudes","authors":"E. Hernandez, F. Bautista, J. P. García-Sandoval, O. Manero","doi":"10.1007/s00397-024-01434-2","DOIUrl":"10.1007/s00397-024-01434-2","url":null,"abstract":"<div>We derive explicit analytical expressions for the recurrence relations using the analytical matrix method for frequency response and the Bautista-Manero-Puig model for complex fluids. The BMP model is derived from the Extended Irreversible Thermodynamics formalism and has been shown to be useful in predicting the complex rheological behavior of self-associative systems. All harmonics of the alternating normal and shear stresses in oscillatory shear with various amplitude oscillatory regimes (AOS) can be calculated analytically, i.e., small amplitude oscillatory shear (SAOS), medium amplitude oscillatory shear (MAOS), and large amplitude oscillatory shear (LAOS). We show that incorporating the effects of the first and second normal stress differences for all AOS regimes leads to the emergence of higher harmonics. We establish the limits between the different AOS regimes based on criteria suggested by the analytical method. For some typical systems, such as CTAB-NaSal, we found a satisfactory quantitative agreement with the measured behavior of AOS.</div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"219 - 240"},"PeriodicalIF":2.3,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139765524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical study on Poiseuille flow of thixotropic yield stress fluids: an exact solution 触变屈服应力流体的 Poiseuille 流动理论研究：精确解法

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-08 DOI: 10.1007/s00397-024-01431-5

Ren Jiangtao, Yin Deshun, Zhao Bin, Ma Liangzhu

引用次数: 0

Fully angularly resolved 3D microrheology with optical tweezers 利用光学镊子实现完全角度分辨的三维微流变学

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-08 DOI: 10.1007/s00397-024-01435-1

Andrew B. Matheson, Tania Mendonca, Matthew G. Smith, Ben Sutcliffe, Andrea Jannina Fernandez, Lynn Paterson, Paul A. Dalgarno, Amanda J. Wright, Manlio Tassieri

{"title":"Fully angularly resolved 3D microrheology with optical tweezers","authors":"Andrew B. Matheson, Tania Mendonca, Matthew G. Smith, Ben Sutcliffe, Andrea Jannina Fernandez, Lynn Paterson, Paul A. Dalgarno, Amanda J. Wright, Manlio Tassieri","doi":"10.1007/s00397-024-01435-1","DOIUrl":"10.1007/s00397-024-01435-1","url":null,"abstract":"<div>Microrheology with optical tweezers (MOT) is an all-optical technique that allows the user to investigate a materials’ viscoelastic properties at microscopic scales, and is particularly useful for those materials that feature complex microstructures, such as biological samples. MOT is increasingly being employed alongside 3D imaging systems and particle tracking methods to generate maps showing not only how properties may vary between different points in a sample but also how at a single point the viscoelastic properties may vary with direction. However, due to the diffraction limited shape of focussed beams, optical traps are inherently anisotropic in 3D. This can result in a significant overestimation of the fluids’ viscosity in certain directions. As such, the rheological properties can only be accurately probed along directions parallel or perpendicular to the axis of trap beam propagation. In this work, a new analytical method is demonstrated to overcome this potential artefact. This is achieved by performing principal component analysis on 3D MOT data to characterise the trap, and then identify the frequency range over which trap anisotropy influences the data. This approach is initially applied to simulated data for a Newtonian fluid where the trap anisotropy induced maximum error in viscosity is reduced from ~ 150% to less than 6%. The effectiveness of the method is corroborated by experimental MOT measurements performed with water and gelatine solutions, thus confirming that the microrheology of a fluid can be extracted reliably across a wide frequency range and in any arbitrary direction. This work opens the door to fully spatially and angularly resolved 3D mapping of the rheological properties of soft materials over a broad frequency range.</div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"205 - 217"},"PeriodicalIF":2.3,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-024-01435-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139765526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From Alveograph test to extensional behavior of wheat flour dough 从阿尔维图测试到小麦粉面团的扩展行为

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-01-23 DOI: 10.1007/s00397-024-01430-6

Maude Dufour, Laurent Chaunier, Florence Hugon, Aurore Dugué, Kamal Kansou, Luc Saulnier, Guy Della Valle

{"title":"From Alveograph test to extensional behavior of wheat flour dough","authors":"Maude Dufour, Laurent Chaunier, Florence Hugon, Aurore Dugué, Kamal Kansou, Luc Saulnier, Guy Della Valle","doi":"10.1007/s00397-024-01430-6","DOIUrl":"10.1007/s00397-024-01430-6","url":null,"abstract":"Dough extensional properties obtained from 14 wheat flours hydrated at 50% (/flour weight) were assessed by the empirical test of Alveograph, a bubble inflation test, and by the rheometric test of uniaxial compression in lubricated conditions (LSF) at large deformations. In baking industry, comparison between flours is based on several parameters (n ≥ 5) defined from the alveogram, which is the time variations of pressure inside dough. In this study, the alveogram is converted into a stress-strain curve (σ = f(εb)). Then, from this curve, the extensional behavior coefficient of the flours, assessed by the consistency k0, is fitted between 0 ≤ εb ≤ 1.5, assuming (dot{varepsilon_b}) = 0.25 s−1 (R2 = 0.99 ± 0.01 for 14 flours). The flow index (n = 0.36) and strain hardening index (SHI = 1.73) are kept constant. The model is validated by comparing the stress values calculated from the alveogram to those measured in LSF for wheat flour doughs hydrated at 50% (R2 = 0.91) at εb = 1 and 0.25.10−2 < (dot{varepsilon_b})< 2.5 s−1. Therefore, the Alveograph, which allows classifying flours according to several dough stretching properties, also provides access to the model of dough extensional behavior.Determining dough extensional properties for alveograph test and validating by comparison with resutls obtained by LSF","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"179 - 190"},"PeriodicalIF":2.3,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139561836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0