SBIR Phase I: A Non-Invasive Viscometer for Materials Analysis and Process Control

SBIR 第一阶段：用于材料分析和过程控制的非侵入式粘度计

• 批准号: 9661122
• 负责人: Geoffrey Barrall
• 金额: $ 7.49万
• 依托单位: Quantum Magnetics, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9661122&HistoricalAwards=false
• 关键词: SBIR; Phase; Non; Invasive; Viscometer

*** 96-61122 Barrall This Small Business Innovation Research (SBIR) Phase I project will magnetic resonance (MR) viscometry and develop specifications for a commercial MR viscometer. Many manufacturing and processing technologies depend on the flow or rheological properties of fluids, suspensions, slurries, or melts. For example, the steady-state shear-dependent viscosity of thermopolymers is often indicative of key properties such as molecular weight and molecular weight distribution. Viscometric measurement of molecular weight distribution requires measuring shear viscosity over two or three decades in shear rate with at least five points per decade. Current in-line and on-line viscometers are not capable of making the required measurements quickly enough to allow real-time process control. The MR viscometer will measure shear viscosity over two decades in shear rate within one minute (about 30 times faster than the present state of the art). It will be noninvasive, capable of investigating particulate-filled systems (which can clog present viscometers), and amenable to large flow streams. The MR viscometer will further be capable of simultaneously measuring other important properties such as diffusion coefficients, of which present viscometers are incapable. A low-cost, in-line system to measure viscosity over several decades in shear rate will find wide application in industries that process melts, slurries, and emulsions. Target markets include thermoplastics, resins, petroleum derivatives, heterogeneous food products, coal, paper, and waste disposal management. ***

这个小企业创新研究（SBIR）第一阶段项目将进行磁共振（MR）粘度测定，并开发商用MR粘度计的规格。许多制造和加工技术依赖于流体、悬浮液、浆料或熔体的流动或流变特性。例如，热熔聚合物的稳态剪切依赖粘度通常是分子量和分子量分布等关键性能的指示。分子量分布的粘度测量需要测量剪切粘度超过二十年或三十年的剪切速率，每十年至少五个点。目前的在线和在线粘度计不能进行所需的测量足够快，以允许实时过程控制。MR粘度计将在一分钟内以剪切速率测量剪切粘度超过二十年（比目前的技术水平快约30倍）。它将是非侵入性的，能够调查充满颗粒的系统（可能堵塞现有的粘度计），并且适合大流量的流。磁共振粘度计还将能够同时测量其他重要的特性，如扩散系数，这是目前的粘度计所不能做到的。一种低成本的在线系统，可以测量几十年来剪切速率下的粘度，将广泛应用于加工熔体、浆料和乳液的行业。目标市场包括热塑性塑料、树脂、石油衍生物、异质食品、煤炭、纸张和废物处理管理。* * *