Experimental investigation of viscoelastic drop deformation in Newtonian matrix at high capillary number under simple shear flow

Li, Huaping; Sundararaj, Uttandaraman

doi:10.1016/j.jnnfm.2010.06.006

Cited by 10 publications

(5 citation statements)

References 51 publications

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“…They also suggested an ordinary differential equation model deciphering the role of parameters like Deborah number, capillary number, and solvent viscosity ratio on drop deformation. The effect of the high capillary number on droplet breakup was also reported experimentally by Li and Sundararaj, where drop deforms under flow direction and vorticity direction. Furthermore, they studied the effect of matrix viscoelasticity on the deformation of Newtonian drop, where matrix viscoelasticity seemed to promote the drop breakup .…”

Section: Introductionsupporting

confidence: 75%

Understanding Deformation and Breakup Tendency of Shear-Thinning Viscoelastic Drops in Constricted Microchannels

Prasad,

Ghosh,

Dalal

2023

Langmuir

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The study of drop deformation in response to various stresses has long piqued the interest of several academics. The deformation behavior of cells, drug carriers, and even drug particles moving via microcapillaries inside the human body can be modeled using a viscoelastic drop model. A drop breakup study can also provide better design guidance for nanocarriers that can deliver on-demand burst drug releases at specific cancer sites. Thus, we attempted to investigate the deformation and breakup of a shear-thinning finitely extensible nonlinear elastic-peterlin (FENE-P) drop moving through the constricted microchannel. The computational simulation suggested that drop deformation and breakup can be manipulated by varying of parameters like channel confinement, Deborah number, solvent viscosity ratio, viscosity ratio, and capillary number. We attempted to find the critical capillary number for initiation of drop breakup. Observations from present study will give valuable insights into deformation and breakup patterns of drug carriers inside constricted microcapillaries. The simulations of the two-phase viscoelastic dropNewtonian matrix system were performed on an open-source solver, Basilisk.

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Section: Introductionsupporting

confidence: 75%

Understanding Deformation and Breakup Tendency of Shear-Thinning Viscoelastic Drops in Constricted Microchannels

Prasad,

Ghosh,

Dalal

2023

Langmuir

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“…To investigate this behavior, the elasto-capillary number (Ec) was calculated as shown below (Li & Sundararaj, 2010):…”

Section: Laos Of the Blendsmentioning

confidence: 99%

Study of non-Newtonian polymer blends using large amplitude oscillatory shearing flow

Daffallah

Almusallam

2021

JER is an international, peer-reviewed journal that publishes f

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Large amplitude oscillatory shear (LAOS) was performed on non-Newtonian minor phase in Newtonian matrix phase polymer blends as a first step toward understating more complex immiscible polymer blends under high deformation condition. The blend consists polybutadiene (PBD) as the droplet phase and polydimethylsiloxane (PDMS) as the matrix phase. The PBD droplet phase was an elastic “Boger” fluid prepared by dissolving a high-molecular-weight PBD into a low-molecular-weight Newtonian PBD. Different percentages of the high-molecular-weight PBD were used to prepare different types of Boger fluids that resulted in blends with different viscosity ratios from lower than unity, to unity and higher than unity. Furthermore, the LAOS results of the blends were analyzed by using the Fourier Transform (FT) technique. From a theoretical point of view, the constrained volume model (CV-model) for Newtonian components is adapted to the case of a Newtonian matrix phase and non-Newtonian Boger fluid droplet phase by taking into account stresses that arise in the Boger fluids. The adapted model and the Newtonian CV-model were compared to the experimental results of FT-LAOS for checking the predictability of the model against the rheological properties. The adapted model shows some reasonable qualitative and quantitative agreements at high strain amplitude values.

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“…Therefore, a long and thin thread breaks into small spherical droplets upon increased shear. 31,46,47,[54][55][56][57][58] The compatibilizer helps with decreasing the IFT, thus favoring a more pronounced breakup of the droplets, leading to a finer morphology. Additionally, by placing it on the surface of the minor phase, the compatibilizer hinders the mobility of the interface and prevent coalescence by creating shells around the drops of the minor phase (steric hindrance or steric stabilization).…”

Section: Modification Strategiesmentioning

confidence: 99%

“…A significant amount of scientific work has been carried out on the nonreactive compatibilization of PE/PP polymer blends. 13,[50][51][52][53][54][55][56][57][58][59] Among the non-in situ coupling agents, ethylene-propylene rubber (EPR) has been one of the most used thermoplastic elastomers in the case of PE/PP blends, because it is widely available, cheap, and easy to process. When introducing EPR to the PE/PP binary system, the propylene repeating units of EPR are inserted within the PP.…”

Section: Nonreactive Compatibilizationmentioning

confidence: 99%

Review on modification strategies of polyethylene/polypropylene immiscible thermoplastic polymer blends for enhancing their mechanical behavior

Graziano

Jaffer²,

Sain

2018

Journal of Elastomers & Plastics

136

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Blends of polyethylene (PE) and polypropylene (PP) have always been the subject of intense reasearch for encouraging polymer waste recycling while producing new materials for specific applications in a sustainable way. However, being thermodynamically immiscible, these polyolefins form a binary system usually exhibiting lower performances compared with those of the homopolymers. Many studies have been carried out to better understand the PE/PP blend compatibilization for developing a high-performance and costeffective product. Both nonreactive and reactive compatibilization promote the brittle to ductile transition for a PE/PP blend. However, the final product usually does not meet the requirements for high demanding commercial applications. Therefore, further PE/PP modification with a reinforcing filler, being either synthetic or natural, proved to be a good method for manufacturing high-performance reinforcend polymer blend composites, with superior and tailored properties. This review summarizes the recent progress in compatibilization techniques applied for enhancing the interfacial adhesion between PE and PP. Moreover, future perspectives on better understanding the influence of themodynamics on PE/PP synergy are discussed to introduce more effective compatibilization strategies, which will allow this blend to be used for innovative industrial applications.

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Experimental investigation of viscoelastic drop deformation in Newtonian matrix at high capillary number under simple shear flow

Cited by 10 publications

References 51 publications

Understanding Deformation and Breakup Tendency of Shear-Thinning Viscoelastic Drops in Constricted Microchannels

Understanding Deformation and Breakup Tendency of Shear-Thinning Viscoelastic Drops in Constricted Microchannels

Study of non-Newtonian polymer blends using large amplitude oscillatory shearing flow

Review on modification strategies of polyethylene/polypropylene immiscible thermoplastic polymer blends for enhancing their mechanical behavior

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