A Mechanistic Understanding of the Process-Property Relationships in an Alternative Electrospinning Process

对替代静电纺丝工艺中工艺性能关系的机械理解

• 批准号: 0800237
• 负责人: Russell Gorga
• 金额: $ 38.92万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800237&HistoricalAwards=false
• 关键词: Mechanistic; Understanding; Process; Property; Relationships

The research objective of this award is to make a paradigm shift in electrospinning, from fiber growth originating at a droplet suspended from a needle, to fiber growth from a large concentration of droplets on a charged plate, in order to significantly increase mass throughput. Furthermore, this methodology may result in the fabrication of smaller diameter fibers (~50 nm) by controlled design of the plate surface (including interfacial tension and surface architecture). In particular, the interaction between the fluid and plate will be controlled by application of patterned or continuous self-assembled monolayers. The overall deliverable of this work is to develop a mechanistic understanding of processing-property relationships in this nanofiber fabrication technique which will impact many diverse applications as described below. If successful, this research will have a technological impact on increasing nanofiber fabrication throughput, allowing further tuning of fiber size, and developing schemes to maximize property improvement with minimal particle concentration in nanocomposite fibers. These goals are crucial to ultimately utilizing nanofibers in diverse commercial applications such as tissue engineering, filtration, fuel cells, and sensors. Therefore, the results will be disseminated widely to support commercial development of highly engineered fibrous substrates for myriad applications. In addition, graduate, undergraduate, and high school students will benefit from this research program by participating in interdisciplinary research in the laboratory setting. Furthermore, the research will be integrated with an engineering senior design course and education/research in a clean room facility with an associated course on modern experimental techniques (such as lithography and high speed imaging - examples of which will be taken from this project). Finally, graduate and undergraduate students will participate as leaders in a polymer science/ engineering experience that is a significant part of a week-long program for high-school students.

该奖项的研究目标是使静电纺丝的模式发生转变，从从针头悬浮的液滴开始纤维生长，到从带电板上的大量液滴开始纤维生长，以显着提高质量吞吐量。此外，这种方法可以通过控制板表面的设计（包括界面张力和表面结构）来制造更小直径的纤维（~50 nm）。特别是，流体和平板之间的相互作用将通过应用图案或连续自组装的单层来控制。这项工作的总体成果是对这种纳米纤维制造技术中加工-性能关系的机理理解，这将影响如下所述的许多不同的应用。如果成功，这项研究将对提高纳米纤维的制造吞吐量产生技术影响，允许进一步调整纤维尺寸，并开发出以最小颗粒浓度最大化纳米复合纤维性能改善的方案。这些目标对于最终将纳米纤维用于各种商业应用（如组织工程、过滤、燃料电池和传感器）至关重要。因此，研究结果将广泛传播，以支持高度工程化纤维基板的商业开发，用于各种应用。此外，研究生、本科生和高中生将通过在实验室环境中参与跨学科研究而受益于这项研究计划。此外，该研究将与工程高级设计课程和洁净室设施的教育/研究相结合，并与现代实验技术相关课程（如光刻和高速成像-将从该项目中获取示例）相结合。最后，研究生和本科生将作为领导者参与聚合物科学/工程体验，这是一个为期一周的高中生项目的重要组成部分。