IMR: Aquisition of a Stress Rheometer for Polymer Materials Research and Education

IMR：购买用于高分子材料研究和教育的应力流变仪

• 批准号: 0113514
• 负责人: Wesley Burghardt
• 金额: $ 4.08万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0113514&HistoricalAwards=false
• 关键词: IMR; Aquisition; Stress; Rheometer; Polymer

This is an award from the Instrumentation for Materials Research program in DMR to Northwestern University. The award is for the acquisition of a controlled stress rheometer to support a wide array of research at Northwestern University on polymer materials and other complex fluids. The proposed instrument will be housed in a central polymer characterization facility, replacing aging equipment with limited capabilities. In addition, it will provide entirely new capabilities for controlled stress testing (such as creep/recovery experiments) that have never been available to the Northwestern community, and that are of significant potential value for the classes of materials under study by the major users of the instrument. In addition to its use in research, the instrument will be used extensively for lab experiments and student projects in a regularly scheduled course on polymer viscoelasticity and flow. The instrument will serve the diverse needs of several faculty members who are presently pursuing research projects that require extensive rheological testing. These include (i) studies of flow-induced structural changes in ordered polymeric and surfactant fluids; (ii) studies of block-copolymer gels that provide a matrix for highly filled gel systems with applications in ceramic processing; (iii) thermoresponsive polymer solutions and microgels under development as matrices for advanced biopolymer separations in microchannel devices; and (iv) a variety of functionalized polymer gels and networks for biomaterials applications. In addition to the primary user community, there are several other Northwestern faculty members who are likely to take advantage of this facility intermittently for miscellaneous polymer & fluid characterization needs.%%%This award from the Instrumentation for Materials Research program in DMR supports the acquisition of a rheometer at Northwestern University. 'Rheology' is the study of the flow properties of so-called complex fluids, and the primary instrumentation used for such research are rheometers, which measure the flow behavior of such complicated materials under well-defined conditions. Many technologically important materials defy simple classification as either solids or liquids. Instead, their flow properties are more complicated, frequently combining elements of both solid and liquid character. Familiar examples from everyday life include food products such as egg whites or mayonnaise, consumer products such as toothpaste, lotions, and adhesives, and biological fluids. The new rheometer will serve a broad community of materials researchers at Northwestern University. Some areas of research that will benefit from this new instrumentation include: 1. Studies of flow-induced structural changes in ordered polymeric and surfactant fluids. 2. Studies of block-copolymer gels that provide a matrix for highly filled gel systems with applications in ceramic processing. 3. Thermoresponsive polymer solutions and microgels under development as matrices for advanced biopolymer separations in microchannel devices. 4. Functionalized polymer gels and networks for biomaterials applications. New materials for tissue engineering and drug delivery are being synthesized with 'bio-mimetic' approaches-designed to simulated nature's strategies for gel and network formation.

这是DMR材料研究仪器项目授予西北大学的奖项。该奖项是为了获得一台受控应力流变仪，以支持西北大学在聚合物材料和其他复杂流体方面的广泛研究。拟议的仪器将被安置在一个中央聚合物表征设施中，取代能力有限的老化设备。此外，它将为受控压力测试(如蠕变/恢复实验)提供全新的功能，这是西北社区从未提供过的，对于该仪器的主要用户正在研究的材料类别具有重要的潜在价值。除了用于研究之外，该仪器还将广泛用于实验室实验和定期安排的关于聚合物粘弹性和流动的课程中的学生项目。该仪器将满足几名教职员工的不同需求，这些教职员工目前正在进行需要广泛流变性测试的研究项目。这些研究包括：(I)有序聚合物和表面活性剂流体中流动诱导的结构变化的研究；(Ii)为陶瓷加工中的高填充凝胶体系提供基质的嵌段共聚凝胶的研究；(Iii)作为微通道设备中先进的生物聚合物分离基质的温度响应性聚合物解决方案和微凝胶的开发；以及(Iv)用于生物材料应用的各种功能化聚合物凝胶和网络的研究。除了主要用户群体，西北大学的其他几名教员可能会间歇性地利用这一设施来满足各种聚合物和流体表征需求。%DMR材料研究仪器项目颁发的这一奖项支持购买西北大学的流变仪。流变学研究的是所谓的复杂流体的流动特性，而用于这类研究的主要仪器是流变仪，它测量这种复杂材料在明确定义的条件下的流动行为。许多具有重要技术意义的材料不能简单地归类为固体或液体。取而代之的是，它们的流动性质更加复杂，经常结合固体和液体性质的元素。日常生活中常见的例子包括食品，如蛋清或蛋黄酱，消费品，如牙膏，乳液，粘合剂，以及生物体液体。新的流变仪将为西北大学广泛的材料研究人员提供服务。将从这一新仪器中受益的一些研究领域包括：1.有序聚合物和表面活性剂流体中流动诱导的结构变化的研究。2.提供高填充凝胶体系基质的嵌段共聚凝胶的研究及其在陶瓷加工中的应用。3.正在开发的热敏聚合物溶液和微凝胶，作为微通道设备中先进的生物聚合物分离的基质。4.用于生物材料应用的功能化聚合物凝胶和网络。用于组织工程和药物输送的新材料正在用“仿生”方法合成--这种方法旨在模拟自然界形成凝胶和网络的策略。