The Effect of Particle-polymer Interactions on the Rheology and Structure of Dilute Particle-filled Polymeric Liquids

颗粒-聚合物相互作用对稀颗粒填充聚合物液体流变学和结构的影响

基本信息

  • 批准号:
    1803156
  • 负责人:
  • 金额:
    $ 31.73万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-07-01 至 2021-06-30
  • 项目状态:
    已结题

项目摘要

Solutions of polymer molecules and suspended solid particles are used in a range of products from paints and coatings to health care and foods. The polymer molecules and the suspended particles act cooperatively to create a range of complex fluid behaviors that impact their processing. While much is known about how particles and polymers act independently to alter fluid responses, little is known about their coupled effects. This project will develop theories to predict 1) the stretching and alignment of polymer molecules by the disturbance to the flow caused by the particles, 2) how elongated solid particles or fibers align in the presence of polymers, and 3) the flow response of mixtures of particles and polymers. The influence of flow rate, flow history, and flow geometry on the behavior of polymer-particle mixtures will be examined. As part of this research, a graduate student and several undergraduates will receive training in fluid dynamics and theoretical and numerical methods. Both the principal investigator and the graduate student will participate in mentoring an undergraduate student from a group that is underrepresented in STEM fields.The interplay of particle and polymer stresses will be explored in steady shear, oscillatory shear, and extensional rheology of suspensions of spheres and fibers in polymer solutions. The hydrodynamic disturbance of the particles can dramatically alter the polymer conformation in the surrounding fluid while the polymer stress can lead to unexpected changes in the particle stresslet. The rheology of fiber suspensions is strongly influenced by the orientations of the fibers. While previous theoretical studies have suggested that polymer stresses induce fiber alignment with the vorticity axis of a steady simple shear flow, experiments reveal a greater diversity of orientations even at low particle concentrations. A search will be made for stable fixed orientations of fibers in simple shear flow and the dependence of the orientations on the rheological properties of the fluid. The rheology of dilute particle-filled polymeric liquids will be determined using an ensemble averaged equation approach. To facilitate quasi-analytic results, perturbation analyses based on small polymer concentration will be performed. In contrast to previous studies that considered second-order fluids, this approach allows an exploration of the strain rate (or Deborah number) dependence of the rheology even while considering weak polymeric stresses. Fully nonlinear computations using a finite volume method in a body-fitted coordinate system will complement the theoretical studies of fiber orientation in simple shear flow. A variety of rheological models that include and exclude shear thinning and finite extensibility will be used to understand the effect that different polymer rheological properties have on particle-polymer interactions. To broaden the diversity of future graduate students in the field, the PI and graduate student on the project will provide on-going mentorship throughout the undergraduate career of a prospective female or URM student from another university as well as offering undergraduate research projects on complex fluids.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
聚合物分子和悬浮固体颗粒的溶液用于从油漆和涂料到医疗保健和食品的一系列产品中。 聚合物分子和悬浮颗粒协同作用,产生一系列影响其加工的复杂流体行为。 虽然人们对颗粒和聚合物如何独立地改变流体反应知之甚少,但对它们的耦合效应知之甚少。 该项目将开发理论来预测1)由颗粒引起的流动扰动引起的聚合物分子的拉伸和排列,2)细长固体颗粒或纤维如何在聚合物存在下排列,以及3)颗粒和聚合物混合物的流动响应。 流速,流动历史,和流动的几何形状上的聚合物颗粒混合物的行为的影响将被检查。 作为这项研究的一部分,一名研究生和几名本科生将接受流体动力学和理论及数值方法的培训。主要研究者和研究生都将参与指导一名本科生,该学生来自STEM领域代表性不足的一个小组。将在稳定剪切、振荡剪切和聚合物溶液中球体和纤维悬浮液的拉伸流变学中探索颗粒和聚合物应力的相互作用。 颗粒的流体动力学扰动可以显著地改变周围流体中的聚合物构象,而聚合物应力可以导致颗粒应力波的意外变化。 纤维悬浮液的流变性受纤维取向的强烈影响。虽然以前的理论研究表明,聚合物应力诱导纤维与稳定的简单剪切流的涡度轴对齐,实验表明,即使在低颗粒浓度的取向更大的多样性。 本文将研究简单剪切流中纤维的稳定固定取向及其对流体流变特性的依赖性。 稀颗粒填充的聚合物液体的流变学将使用系综平均方程方法来确定。 为了便于准分析结果,将进行基于小聚合物浓度的扰动分析。 与以前的研究,认为二阶流体,这种方法允许探索的应变率(或德博拉数)的流变学的依赖性,即使在考虑弱聚合物应力。 在贴体坐标系中使用有限体积法的完全非线性计算将补充简单剪切流中纤维取向的理论研究。 包括和排除剪切稀化和有限延伸性的各种流变模型将用于理解不同聚合物流变特性对颗粒-聚合物相互作用的影响。 为了扩大该领域未来研究生的多样性,项目的PI和研究生将提供-在另一所大学的未来女性或URM学生的整个本科生涯中进行指导,并提供复杂流体的本科研究项目。该奖项反映了NSF的法定使命,并通过使用基金会的智力价值和更广泛的影响审查标准。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Collision rate of bidisperse, hydrodynamically interacting spheres settling in a turbulent flow
湍流中沉降的双分散、流体动力学相互作用球体的碰撞率
  • DOI:
    10.1017/jfm.2020.1113
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Dhanasekaran, Johnson;Roy, Anubhab;Koch, Donald L.
  • 通讯作者:
    Koch, Donald L.
The combined hydrodynamic and thermodynamic effects of immobilized proteins on the diffusion of mobile transmembrane proteins
固定化蛋白质对移动跨膜蛋白质扩散的综合流体力学和热力学效应
  • DOI:
    10.1017/jfm.2019.592
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Singh, Rohit R.;Sangani, Ashok S.;Daniel, Susan;Koch, Donald L.
  • 通讯作者:
    Koch, Donald L.
Collision rate of bidisperse spheres settling in a compressional non-continuum gas flow
双分散球体在压缩非连续气流中沉降的碰撞率
  • DOI:
    10.1017/jfm.2020.942
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Dhanasekaran, Johnson;Roy, Anubhab;Koch, Donald L.
  • 通讯作者:
    Koch, Donald L.
Hydroshearing poorly connected preexisting fractures in the presence of stress anisotropy as a random percolation process
在应力各向异性存在的情况下,以随机渗流过程对连接不良的现有裂缝进行水力剪切
  • DOI:
    10.1103/physrevresearch.2.033026
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    4.2
  • 作者:
    Alhashim, Mohammed G.;Koch, Donald L.
  • 通讯作者:
    Koch, Donald L.
Electrophoresis in dilute polymer solutions
稀聚合物溶液中的电泳
  • DOI:
    10.1017/jfm.2019.926
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Li, Gaojin;Koch, Donald L.
  • 通讯作者:
    Koch, Donald L.
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Donald Koch其他文献

Donald Koch的其他文献

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{{ truncateString('Donald Koch', 18)}}的其他基金

Slender body theory and finite difference computations to characterize particle-fluid interactions at moderate Reynolds numbers
细长体理论和有限差分计算来表征中等雷诺数下的颗粒-流体相互作用
  • 批准号:
    2206851
  • 财政年份:
    2022
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
UNS: Employing hydrodynamic lift and particle trajectory ratcheting to achieve sieve-free separations based on size and shape in cross-flow filtration
UNS:利用流体动力升力和颗粒轨迹棘轮,在错流过滤中根据尺寸和形状实现无筛分离
  • 批准号:
    1505795
  • 财政年份:
    2015
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Using shape to control the orientations and positions of particles in processing flows
使用形状来控制处理流程中颗粒的方向和位置
  • 批准号:
    1435013
  • 财政年份:
    2014
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Collaborative Research: The role of microphysical processes and turbulence intermittency in droplet coalescence in warm cumulus clouds
合作研究:微物理过程和湍流间歇性在暖积云中液滴合并中的作用
  • 批准号:
    1435953
  • 财政年份:
    2014
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Hydrodynamic instabilities and flow modification caused by preferential concentration of inertial particles
惯性颗粒优先集中引起的水动力不稳定性和流动改变
  • 批准号:
    1233793
  • 财政年份:
    2012
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Hydrodynamically Assisted Bacterial Chemotaxis
流体动力学辅助细菌趋化作用
  • 批准号:
    1066193
  • 财政年份:
    2011
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Collective Hydrodynamics of Swimming Bacteria: A Living Fluid
游动细菌的集体流体动力学:一种活体液体
  • 批准号:
    0730579
  • 财政年份:
    2007
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Continuing Grant
The Effects of Fluid-Particle and Particle-Particle Interactions on the Structure and Flow Properties of Suspensions of Fibers and Disks
流体-颗粒和颗粒-颗粒相互作用对纤维和圆盘悬浮液结构和流动性能的影响
  • 批准号:
    0332902
  • 财政年份:
    2004
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Standard Grant
Nonlinear-Flow-Induced Structure in Fiber Suspensions
纤维悬浮液中的非线性流动诱导结构
  • 批准号:
    9910908
  • 财政年份:
    2000
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Continuing Grant
Fluid Flow, Pressure Drop, and Heat and Mass Transfer in Packed Beds at Moderate Reynolds Numbers
中等雷诺数下填充床中的流体流动、压降以及传热传质
  • 批准号:
    9526149
  • 财政年份:
    1996
  • 资助金额:
    $ 31.73万
  • 项目类别:
    Continuing Grant

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环形等离子体中的离子漂移波不稳定性和湍流的保结构Particle-in-Cell模拟
  • 批准号:
    11905220
  • 批准年份:
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  • 批准号:
    30560052
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    2005
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    20.0 万元
  • 项目类别:
    地区科学基金项目

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Polymer particle catalysed miRNA therapeutics for HGSOC precision medicines
用于 HGSOC 精准医学的聚合物颗粒催化 miRNA 疗法
  • 批准号:
    MR/Z503927/1
  • 财政年份:
    2024
  • 资助金额:
    $ 31.73万
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Superstabilization of perovskite quantum dots: a proposal of in-situ synthesis during spherical polymer particle preparation
钙钛矿量子点的超稳定性:球形聚合物颗粒制备过程中原位合成的提议
  • 批准号:
    23K04411
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    2023
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Particle-Assisted Control over Macrophage-Neutrophil interactions (Pac-Man)
巨噬细胞-中性粒细胞相互作用的粒子辅助控制(吃豆人)
  • 批准号:
    10725989
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    2023
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Development of high-speed interruption technology for DC arc by polymer ablation and aerosol particle mixing using water-absorbing polymer ablation
开发聚合物烧蚀直流电弧高速中断技术和吸水聚合物烧蚀气溶胶颗粒混合技术
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Development of high-speed interruption technology for DC arc by polymer ablation and aerosol particle mixing using water-absorbing polymer ablation
开发聚合物烧蚀直流电弧高速中断技术和吸水聚合物烧蚀气溶胶颗粒混合技术
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Design of inner structure of reactor for synthesis of polymer nano particle
聚合物纳米颗粒合成反应器内部结构设计
  • 批准号:
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阐明碳纤维增强热塑性塑料在纤维/聚合物界面附近焊接过程中的微米/纳米颗粒现象
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CoERCe III Polymer Particle Beads (PPBs) Scale-Up Experimental Development
CoERCe III 聚合物颗粒珠 (PPB) 放大实验开发
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