Rheologica Acta最新文献_第4页

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

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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

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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

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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><p>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.</p></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}

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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><p>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.</p></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

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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><p>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 <i>and</i> angularly resolved 3D mapping of the rheological properties of soft materials over a broad frequency range.</p></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":"<p>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 (<i>n</i> ≥ 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 (<i>σ</i> = <i>f</i>(<i>ε</i><sub>b</sub>)). Then, from this curve, the extensional behavior coefficient of the flours, assessed by the consistency <i>k</i><sub>0</sub>, is fitted between 0 ≤ ε<sub>b</sub> ≤ 1.5, assuming <span>(dot{varepsilon_b})</span> = 0.25 s<sup>−1</sup> (<i>R</i><sup>2</sup> = 0.99 ± 0.01 for 14 flours). The flow index (<i>n</i> = 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% (<i>R</i><sup>2</sup> = 0.91) at <i>ε</i><sub>b</sub> = 1 and 0.25.10<sup>−2</sup> < <span>(dot{varepsilon_b})</span>< 2.5 s<sup>−1</sup>. Therefore, the Alveograph, which allows classifying flours according to several dough stretching properties, also provides access to the model of dough extensional behavior.</p><p>Determining dough extensional properties for alveograph test and validating by comparison with resutls obtained by LSF</p>","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}

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Rheology and dissolution capacity of cellulose in novel [mTBNH][OAc] ionic liquid mixed with green co-solvents 纤维素在与绿色助溶剂混合的新型[mTBNH][OAc]离子液体中的流变性和溶解能力

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-01-18 DOI: 10.1007/s00397-024-01433-3

Elvira Tarasova, Nutan Savale, Peeter-Mihkel Ausmaa, Illia Krasnou, Andres Krumme

{"title":"Rheology and dissolution capacity of cellulose in novel [mTBNH][OAc] ionic liquid mixed with green co-solvents","authors":"Elvira Tarasova, Nutan Savale, Peeter-Mihkel Ausmaa, Illia Krasnou, Andres Krumme","doi":"10.1007/s00397-024-01433-3","DOIUrl":"10.1007/s00397-024-01433-3","url":null,"abstract":"<div><p>Dissolution of cellulose is crucial for its regeneration and chemical modification, such as homogeneous transesterification, for example. The cellulose dissolution in ionic liquid (IL) media is suggested as a prospective environmentally friendly alternative to conventional solvents. In this study, novel distillable ionic liquid 5-methyl-1,5,7-triaza-bicyclo-[4.3.0]non-6-enium acetate, [mTBNH][OAc] was used for cellulose dissolution. This IL has high dissolving power towards cellulose and durability for recycling. However, the disadvantage of ILs is their high viscosity, which limits the supreme cellulose concentration in IL solutions, and their high cost, hindering their commercialization. The addition of low-viscous, low-cost, and naturally derived co-solvents can reduce the overall viscosity and cost. In this study, rheology experiments were conducted to investigate the flow behavior of cellulose in [mTBNH][OAc] ionic liquid mixed with the green co-solvents such as γ-Valerolactone (GVL), dimethyl isosorbide (DMI), and N,N′-dimethylpropyleneurea (DMPU). A study of the rheology showed that the viscosity reduces at low doses of co-solvent (≤ 50 wt%) but causes the structuring of the cellulose solution and its gelation (or phase separation) at high doses (≥ 50 wt%). The rheological study also indicated that the flow activation energy of cellulose in IL/co-solvent systems is lower than that in pure IL and decays in the order of DMPU > DMI > GVL > DMSO.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 2","pages":"167 - 178"},"PeriodicalIF":2.3,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139496939","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}

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Rheological behavior of SiO2 NP/CTAB/PPA wormlike micelles in alcohol/water mixture SiO2 NP/CTAB/PPA 虫状胶束在醇水混合物中的流变行为

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-01-17 DOI: 10.1007/s00397-024-01432-4

Huiying Han, Maen M. Husein, Giovanniantonio Natale

{"title":"Rheological behavior of SiO2 NP/CTAB/PPA wormlike micelles in alcohol/water mixture","authors":"Huiying Han, Maen M. Husein, Giovanniantonio Natale","doi":"10.1007/s00397-024-01432-4","DOIUrl":"10.1007/s00397-024-01432-4","url":null,"abstract":"<div><p>This study explores the effect of alcohol on the rheological behavior of SiO<sub>2</sub> nanoparticle (NP) in cetyltrimethylammonium bromide (CTAB)/potassium hydrogen phthalate (PPA) wormlike micelles (WLMs). No previous literature explored the effect of chemical stresses on NP-mediated WLMs. The addition of 0.05 wt% NPs increased the zero-shear viscosity of 30 mM CTAB/20 mM PPA WLMs by 30%. A further increase in SiO<sub>2</sub> NPs disrupted the micellar structure, resulting in reduced viscosity. The optimum SiO<sub>2</sub> NP content increased from ~ 0.05 wt% to ~ 0.4 wt% as the CTAB and PPA concentrations increased from 30 mM CTAB/20 mM PPA to 90 mM CTAB/60 mM PPA. The effect of ethanol and 1-hexanol on WLMs composed of 0.05 wt% SiO<sub>2</sub> NP/30 mM CTAB/20 mM PPA was assessed. The NPs enhanced the shear viscosity of ethanol/WLM systems. Notably, at ethanol concentrations of 0.14 wt%, 0.60 wt% and 1.40 wt%, the zero-shear viscosity increased by approximately 60%, 100%, and 25%, respectively. SiO<sub>2</sub> NPs acted as junction points, facilitating the crosslinking among shorter micelles and improving micellar entanglement. Conversely, SiO<sub>2</sub> NPs had little impact on 1-hexanol/WLM systems owing to the strong interaction between WLMs and 1-hexanol at the micellar interface.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 2","pages":"157 - 166"},"PeriodicalIF":2.3,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139497160","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