MRI: Acquisition of a Rheometer for Interdisciplinary Material Science Research and Training of Undergraduate Researchers

MRI：购买流变仪用于跨学科材料科学研究和本科研究人员培训

基本信息

批准号：
1919429
负责人：
Ryan McGorty
金额：
$ 26.38万
依托单位：
University of San Diego
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-15 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1919429&HistoricalAwards=false
关键词：
MRI Acquisition Rheometer Interdisciplinary Material

项目摘要

This award, from the Major Research Instrumentation program, supports the University of San Diego's acquisition of a rheometer. Rheometers are routinely used to study the flow and deformation of soft materials (for example, gels) as a function of applied force and time. Rheometers measure properties such as viscosity, which is a measure of resistance to flow. For instance, water flows easier than honey, so it has a lower viscosity. Viscoelastic materials are those that exhibit both viscous and elastic characteristics under deformation. The rheometer to be acquired is capable of precisely controlling sample temperature, and it also provides direct microscopic visualization of samples under flow. The rheometer also is equipped with tools to measure the tensile and bending strength of solid materials. This instrument will enable the University of San Diego faculty to conduct cutting-edge research on topics related to the behavior of biopolymers (for example, DNA solutions) and antibacterial materials. The rheometer will be used to provide hands-on training of undergraduates across different disciplines such as bioengineering and physics. The instrument also will enable the development of a new interdisciplinary course on biomaterials.A state-of-the-art rheometer equipped with multiple accessories will accommodate diverse research and teaching needs at the University of San Diego, a primarily undergraduate teaching institution. This instrument will significantly advance four specific projects at the University of San Diego. First, it will be used to answer questions on how fluid-fluid phase separation is influenced by shear. Second, it will measure the mechanical properties of starch hydrogels which are used to deliver antimicrobial agents. Third, it will determine how the rheological properties of seawater are altered by mucous secretions and aggregates of microorganisms. Finally, it will measure the viscoelastic properties of biomaterials including cytoskeletal networks and entangled DNA solutions. These main projects, as well as others at the University of San Diego and at neighboring institutions, will be advanced substantially by this state-of-the-art rheometer.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.

该奖项来自主要的研究仪器计划，支持圣地亚哥大学收购变句。流变仪通常用于研究软材料（例如凝胶）的流动和变形，这是施加力和时间的函数。流变仪测量诸如粘度之类的特性，这是对流动阻力的量度。例如，水比蜂蜜更容易流动，因此粘度较低。粘弹性材料是在变形下表现出粘性和弹性特性的材料。要获取的休斯仪能够精确控制样品温度，并且还提供了流动下样品的直接微观可视化。节省仪还配备了测量固体材料的拉伸和弯曲强度的工具。该工具将使圣地亚哥大学能够对与生物聚合物（例如DNA溶液）和抗菌材料有关的主题进行尖端研究。流变仪将用于提供对生物工程和物理等不同学科的本科生的动手培训。该工具还将能够开发一项新的生物材料跨学科课程。配备多个配件的最先进的节省仪将适应圣地亚哥大学的各种研究和教学需求，这是一家主要是本科教学机构。该工具将在圣地亚哥大学大大推动四个特定的项目。首先，它将用于回答有关流体流体相分离如何受剪切影响的问题。其次，它将测量用于输送抗菌剂的淀粉水凝胶的机械性能。第三，它将决定如何通过微生物的粘液分泌物和骨料改变海水的流变特性。最后，它将测量包括细胞骨架网络和纠缠DNA溶液在内的生物材料的粘弹性。这些主要项目以及圣地亚哥大学和邻近机构的其他项目将通过此最先进的流变仪大大提高。该奖项反映了NSF的法定任务，并认为值得通过基金会的知识分子优点和更广泛的影响审查标准通过评估来获得支持。