GOALI: Fundamentals of Fabrication of Nanofiber Assemblies by Electrospinning

GOALI：静电纺丝制造纳米纤维组件的基础知识

• 批准号: 0100354
• 负责人: Yuris Dzenis
• 金额: $ 36万
• 依托单位: University of Nebraska-Lincoln
• 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: 2001-05-01 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0100354&HistoricalAwards=false
• 关键词: GOALI; Fundamentals; Fabrication; Nanofiber; Assemblies

The objective of this Grant Opportunities for Academic Liaison with Industry (GOALI) research project is to continue the comprehensive experimental and theoretical study of electrospinning of polymer nanofibers with the emphasis now on the fabrication of nanofiber assemblies and the evaluation of their microstructure and properties. Electrospinning is an emerging technology producing polymer fibers in the diameter range from a few microns down to three nanometers. Previous collaborative research by the principal investigators has advanced the understanding of the process in a single jet regime, including a recent discovery and analysis of a hierarchical bending instability as a major mechanism of production of small diameter fibers. Potential industrial applications of the process require further development of methods of nanofiber placement and fabrication of nanofiber assemblies with controlled geometry, orientation, and properties. This research will provide a body of knowledge necessary for the development of robust, industrially relevant methods and devices for flexible and reproducible fabrication of large nanofiber assemblies with controlled geometry and microstructure. Development of better methods of fabrication of nanofibers and their useful assemblies will produce a considerable impact in the general area of nanostructured materials.In order to establish new technologies for the control of nanofiber placement, the research tasks will include experimental and theoretical analysis of the density distribution of jets in the cloud region of the process envelope. Under normal conditions, non-woven sheets with random fiber orientation are being produced. By taking into account the interactions of the segments of the jet with themselves and with the external field, electromechanical methods of placement of the nanofibers into controlled oriented and gradient assemblies will be explored. Microstructure and properties of these assemblies will be characterized and correlated with the process parameters. The research will be performed in close collaboration with the Donaldson Company, Lucent Technologies Bell Laboratories, NIST, and SUNY Stony Brook/Brookhaven National Laboratory.

该学术与工业联络资助机会（GOALI）研究项目的目的是继续对聚合物纳米纤维静电纺丝进行全面的实验和理论研究，目前的重点是纳米纤维组件的制造及其微观结构和性能的评估。 静电纺丝是一种新兴技术，可生产直径范围从几微米到三纳米的聚合物纤维。 主要研究人员之前的合作研究增进了对单射流状态下过程的理解，包括最近发现和分析了分层弯曲不稳定性作为小直径纤维生产的主要机制。 该过程的潜在工业应用需要进一步开发纳米纤维放置方法以及具有受控几何形状、方向和性能的纳米纤维组件的制造方法。 这项研究将为开发稳健的、工业相关的方法和设备提供必要的知识体系，以灵活、可重复地制造具有受控几何形状和微观结构的大型纳米纤维组件。 开发更好的纳米纤维及其有用组件的制造方法将对纳米结构材料的一般领域产生相当大的影响。为了建立控制纳米纤维放置的新技术，研究任务将包括密度的实验和理论分析过程包络线云区域中射流的分布。 在正常条件下，生产的是具有随机纤维取向的无纺布片材。 通过考虑射流各段与其自身以及与外部场的相互作用，将探索将纳米纤维放置到受控定向和梯度组件中的机电方法。 这些组件的微观结构和性能将被表征并与工艺参数相关联。 该研究将与唐纳森公司、朗讯科技贝尔实验室、NIST 和纽约州立大学石溪/布鲁克海文国家实验室密切合作进行。