GOALI: Large-Scale Structures in Colloids with Moderate-Range Attractions

GOALI:具有中等范围吸引力的胶体中的大型结构

基本信息

  • 批准号:
    0853551
  • 负责人:
  • 金额:
    $ 31.08万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-09-15 至 2013-08-31
  • 项目状态:
    已结题

项目摘要

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).0853551BhatiaColloidal particles with attractive interparticle potentials are important from both a fundamental and applications standpoint. Much of the research to date has focused on colloids with short-range attractions, which may form either attractive colloidal glasses or networked gels. However, recent studies have shown that a new phase containing stable dense clusters of particles may be formed in systems with moderate-range attractions. These exciting results underscore the importance of the range of attraction as an additional parameter to explore in determining the phase behavior of attractive colloids. In this GOALI project, we will develop a fundamental understanding of how the range of attractive interactions impacts large-scale structure in colloidal dispersions, including aggregation and formation of finite sized clusters, and apply this knowledge to develop improved toner formulations. We confine ourselves to systems in which the attractions arise from bridging chains and in which the particle polymer size ratio is O(1). Our study distinguishes itself from previous work in that we will both quantify the interparticle potential using small angle scattering and explore structure using scattering and imaging techniques. The main objectives of the proposal are to: 1. Develop a model system where the range of attraction can be tuned, and characterize the interparticle potential using small angle neutron scattering; 2. Probe large scale structure and aggregation in systems at rest using ultra-small angle neutron scattering (USANS), dynamic light scattering, confocal microscopy, and TEM; 3. Investigate the effect of shear on cluster morphology and rheology; and 4. Test the extensibility of our findings to industrially relevant systems, through graduate student internships and industrial interactions provided by researchers at Xerox Corporation. Xerox Corporation is interested in applications of colloidal aggregation to toner production and will serve as the industrial partner for this GOALI. Inclusion of Xerox as a partner will add value by facilitating transfer of the research results into an industrially relevant technology and by broadening the training experiences of graduate and undergraduate students involved in the project. Xerox personnel will actively participate by providing comments and suggestions at regular research team meetings, by arranging student internships to evaluate the applicability of the research to toner production, by providing funds in support of portions of the work, and by participating in an industrial short course.
该奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。0853551 Bhatia从基础和应用的角度来看,具有吸引力的颗粒间潜力的胶体颗粒都很重要。迄今为止,大部分研究都集中在具有短程吸引力的胶体上,这些胶体可能形成有吸引力的胶体玻璃或网状凝胶。然而,最近的研究表明,一个新的阶段,包含稳定的密集的粒子团簇可能会形成在系统中与中等范围的吸引力。这些令人兴奋的结果强调了吸引力的范围作为一个额外的参数,以探索在确定有吸引力的胶体的相行为的重要性。在这个GOALI项目中,我们将对吸引力相互作用的范围如何影响胶体分散体中的大规模结构(包括有限尺寸簇的聚集和形成)有基本的了解,并将这些知识应用于开发改进的墨粉配方。我们把自己限制在系统中的吸引力产生的桥接链和其中的颗粒聚合物的尺寸比是O(1)。我们的研究区别于以往的工作,我们将量化的粒子间的潜力,使用小角散射和散射和成像技术探索结构。该提案的主要目标是:1.建立一个吸引力范围可调的模型系统,并利用小角中子散射表征粒子间势; 2.利用超小角中子散射(USANS)、动态光散射、共聚焦显微镜和TEM探测静止系统中的大尺度结构和聚集; 3.研究剪切对团簇形态和流变学的影响;以及4.通过研究生实习和施乐公司研究人员提供的工业互动,测试我们的研究结果对工业相关系统的可扩展性。施乐公司对胶体聚集在墨粉生产中的应用很感兴趣,并将作为该GOALI的工业合作伙伴。施乐公司作为合作伙伴的加入将增加价值,促进研究成果转化为工业相关技术,并扩大参与该项目的研究生和本科生的培训经验。施乐公司人员将积极参与,在定期的研究小组会议上提出意见和建议,安排学生实习以评估研究对墨粉生产的适用性,提供资金支持部分工作,并参加工业短期课程。

项目成果

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Surita Bhatia其他文献

Surita Bhatia的其他文献

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{{ truncateString('Surita Bhatia', 18)}}的其他基金

Understanding the Role of Crystalline Junctions in Associative Polymer Gels
了解缔合聚合物凝胶中结晶连接的作用
  • 批准号:
    1905547
  • 财政年份:
    2019
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant
Dynamics of Stratification in Multicomponent Colloidal Films During Evaporative Drying
蒸发干燥过程中多组分胶体膜的分层动力学
  • 批准号:
    1903189
  • 财政年份:
    2019
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant
NRT-HDR: Quantitative Analysis of Dynamic Structures
NRT-HDR:动态结构的定量分析
  • 批准号:
    1922639
  • 财政年份:
    2019
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant
REU Site: Exploring the Chemistry of Energy Applications, Living Systems, and Supramolecular Assemblies (ExCELS)
REU 网站:探索能源应用、生命系统和超分子组装的化学 (ExCELS)
  • 批准号:
    1358959
  • 财政年份:
    2014
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant
A Scalable Single-Step Process to Create Multifunctional Coatings
创建多功能涂层的可扩展单步工艺
  • 批准号:
    1335787
  • 财政年份:
    2013
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant
REU Site: Exploring Engineered Cells
REU 站点:探索工程细胞
  • 批准号:
    1005083
  • 财政年份:
    2010
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Continuing Grant
Summer REU Site on Cellular Engineering
REU 夏季细胞工程网站
  • 批准号:
    0649041
  • 财政年份:
    2007
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Continuing Grant
CAREER: Structure and Rheology of Soft Attractive Colloids: Interactions Due to Bridging Polymers and Applications to Fluorocarbon Gels
职业:软吸引胶体的结构和流变学:桥联聚合物的相互作用及其在氟碳凝胶中的应用
  • 批准号:
    0238873
  • 财政年份:
    2003
  • 资助金额:
    $ 31.08万
  • 项目类别:
    Standard Grant

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