| 项目编号: | 1437710
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| 项目名称: | Role of Composition on Mesostructure-Flow Interaction and Rheology of Particle Laden Interfaces |
| 作者: | Gordon Christopher
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| 承担单位: | Texas Tech University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD294924
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | mesostructure
; composition
; rheology
; interface
; role
; interparticle force
; particle-laden
; particle-laden interface
; particle size
; small particle
; particle-covered interface
; particle interaction
; particle surface concentration
; interfacial particle
; flow-induced deformation
; adsorbed particle
; equilibrium mesostructure
; interfacial rheology
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| 英文摘要: | CBET-1437710
The physical properties of suspensions such as emulsions and foams can be strongly affected by the presence of small particles that adsorb onto liquid-liquid or liquid-gas interfaces. This project will explore how the presence of adsorbed particles, their composition, and the arrangements they can take on an interface, which is called their mesostructure, can influence the rheology of the interface. An interfacial rheometer has been developed for this study, which will allow investigators to measure characteristics of the interface and simultaneously observe particles at the interface. The results will be used to determine the role of mesostructures on interfacial rheology. This relationship between structure and rheology is important, because many manufacturing chemical processes found in consumer cosmetics, food products, drug delivery applications, and enhanced oil recovery use emulsions that have particle-laden or particle-covered interfaces. The information gathered in this project will be useful to scientists and engineers who formulate such products and design large-scale processes to manufacture them. The investigators will use results from the project to develop a series of informative and engaging modules that can be used by instructors to teach fluid dynamics principles to university and middle-school students.
The mesostructure in particle-laden interfaces are affected by interparticle forces, which depend on composition. The mesostructure resists flow-induced deformation, resulting in an interfacial viscoelasticity. The nature of particle interactions on an interface differs from that in the bulk, primarily because of an anisotropic capillary attraction between interfacial particles. Using the interfacial rheometer, investigators will characterize the role of composition on the equilibrium mesostructure of particle-laden interfaces, characterize the role of composition on the rheology and mesostructure of deforming interfaces, and relate changes in composition such as particle surface concentration, particle size and polydispersity, and surfactant concentration to interparticle forces and viscous forces. Viscoelasticity of such interfaces affects dynamical behavior of emulsions, including drop deformation, coalescence and breakup. Understanding the relationship between composition and rheology will allow practitioners to tailor interfaces and engineer materials with desired properties. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95889
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Gordon Christopher. Role of Composition on Mesostructure-Flow Interaction and Rheology of Particle Laden Interfaces. 2013-01-01.
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