Multiscale manufacturing and characterization of nanofibrous structures

纳米纤维结构的多尺度制造和表征

• 批准号: 346195-2012
• 负责人: Ko, Frank
• 金额: $ 1.75万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=549672
• 关键词: Multiscale; manufacturing; characterization; nanofibrous; structures

Nanoscale polymeric fibrous materials are the fundamental building blocks of living systems. From 1.5nm double helix strands of DNA molecules to sensory cells, nanoscale fibers form the extracellular matrices for tissues and organs. Specific junctions between these cells conduct electrical and chemical signals that result from various kinds of stimulation. The signals direct normal functions of the cells such as energy storage, information storage and retrieval, tissue regeneration, and sensing. Inspired by the multifunctional nanofibrous nature of living systems, through the current NSERC Discovery grant, the concept of functional nanofibres has been successfully demonstrated by the development of co-electrospinning processes capable of fabricating composite nanofibres consisting of functional nanoparticles and polymeric matrices. This led to many exciting potential applications in energy, environment and health care industry. However it was also founded that the structural properties such as strength and modulus of the nanofibrous structures are below expectation. There is a lack of fundamental understanding of the structure and properties of nanofibres at the individual fibre level thus impeding our ability for hierarchical/multiscale design/fabrication of nanofibrous structures. It was recognized that an ability to manipulate and characterize nanofibrous materials is needed at the individual fibre level. In order to connect nanofibre properties to higher order structures the translation of nanofibre properties to linear fibre assemblies, planar and 3D fibre assemblies as well as composite structures must be characterized and understood. In order to close the gap between Technology Readiness Levels and turning nanofibre technology from a laboratory curiosity to manufacturing reality the issue of scale up manufacturing must be addressed. Accordingly our objective is to connect the fundamental level knowledge generated in this proposed program to form nano-, micro- and eventually macro-structures that will lead to multifunctional structures for various applications of composite nanofibres related to energy, environment and health care.

纳米级聚合物纤维材料是生命系统的基本构建块。从DNA分子的1.5nm双螺旋线到感觉细胞，纳米级纤维形成了组织和器官的细胞外矩阵。 这些细胞之间的特定连接导致各种刺激导致的电信号和化学信号。 信号直接导致细胞的正常功能，例如能源存储，信息存储和检索，组织再生和感应。受到当前的NSERC发现赠款的启发，受生命系统的多功能纳米纤维性质的启发，功能性纳米纤维的概念已通过开发能够制造由功能性纳米颗粒和聚合物MATRICES组成的复合纳米纤维的共同纺丝过程成功证明。这导致了许多令人兴奋的能源，环境和卫生保健行业的应用程序。然而，还建立了纳米纤维结构的强度和模量之类的结构特性低于预期。缺乏对单个纤维水平纳米纤维的结构和特性的基本了解，从而阻碍了我们在纳米纤维结构的分层/多尺度设计/制造的能力。人们认识到，在单个纤维水平上需要操纵和表征纳米纤维材料的能力。为了将纳米纤维特性连接到高阶结构，必须对纳米纤维特性转换为线性光纤组件，平面和3D光纤组件以及复合结构，并且必须表征和理解。为了缩小技术准备水平和将纳米纤维技术从实验室的好奇心转变为制造现实之间的差距，必须解决规模化制造的问题。因此，我们的目标是连接该提议的计划中产生的基本知识，以形成纳米，微观和最终的宏观结构，这些结构将导致多功能结构，以用于与能源，环​​境和医疗保健相关的复合纳米纤维的各种应用。