CAREER: Processing Intrinsically Conductive Polymers for Fibers via Side-by-Side Spinning

职业：通过并列纺丝加工本质导电聚合物纤维

• 批准号: 2145468
• 负责人: Hang Liu
• 金额: $ 52.86万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-03-15 至 2027-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2145468&HistoricalAwards=false
• 关键词: CAREER; Processing; Intrinsically; Conductive; Polymers

Intrinsically conductive polymers (ICP) are a group of organic polymers whose chemical bonds on the molecular backbone allow conduction of electricity. Their pendant groups also allow chemical modifications for special functions, so ICPs have shown potential for use in smart textiles, which have embedded electronic circuitry that enables them to interact with the wearer and respond to environmental stimuli. However, the rigid molecular structure of ICPs limits their processability into flexible fibers for textile fabrication. This Faculty Early Career Development (CAREER) grant supports research into a new wet-spinning technology to manufacture flexible conductive fibers via side-by-side co-spinning of an ICP with a conventional polymer. The project will utilize both experimental and theoretical methods to investigate the side-by-side fiber formation process and evaluate its influence on fiber properties. The research outcomes should help to control the functional fiber manufacturing process, and allow the fibers to be used to construct sensors for smart wearables, which might find broad applications in healthcare, the military, and sports. Curriculum development and outreach activities will be integrated with research to involve K-12 and college students, especially those from groups underrepresented in STEM, to cultivate their interest in textile science/engineering, and to strengthen the workforce pipeline for the textile industry, in order to improve American competitiveness in the field. The goal of the project is to develop a fundamental understanding of the process-structure-property relationships of ICP side-by-side wet spinning, especially the interactions at the interface of the ICP with the spinnable conventional polymer, including the complex fluid interaction kinetics under various spinning conditions. Different types of side-by-side spinnerets will be designed, and the effects of the spinneret geometry on fiber formation will be studied. The influence of polymer solution properties and spinning control parameters on the side-by-side fibers' mechanical, electrical, and sensing properties will also be investigated. Computational fluid dynamics modeling will be used to simulate the hydrodynamics of the solutions inside the spinneret and in the coagulation bath during wet spinning, in order to simplify and optimize the experimental design. The fundamental process-structure-property relationships obtained could be applicable to multiple polymer solution manufacturing techniques, including wet spinning, electrospinning, direct ink writing 3D printing, and microfluid spinning.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

本质导电聚合物（ICP）是一组有机聚合物，其分子主链上的化学键可以导电。它们的悬垂基团还允许进行化学修饰以实现特殊功能，因此 ICP 已显示出在智能纺织品中使用的潜力，这些纺织品嵌入了电子电路，使它们能够与穿着者互动并对环境刺激做出反应。然而，ICP 的刚性分子结构限制了其加工成用于纺织品制造的柔性纤维的性能。该学院早期职业发展 (CAREER) 拨款支持对新型湿纺技术的研究，通过 ICP 与传统聚合物并列共纺来制造柔性导电纤维。该项目将利用实验和理论方法来研究并排纤维形成过程并评估其对纤维性能的影响。研究成果应有助于控制功能性纤维的制造过程，并允许纤维用于构建智能可穿戴设备的传感器，这可能会在医疗保健、军事和体育领域得到广泛的应用。课程开发和推广活动将与研究相结合，让K-12和大学生，特别是来自STEM领域代表性不足的群体的学生参与进来，培养他们对纺织科学/工程的兴趣，并加强纺织行业的劳动力管道，以提高美国在该领域的竞争力。 该项目的目标是对ICP并列湿法纺丝的工艺-结构-性能关系有一个基本的了解，特别是ICP与可纺常规聚合物界面的相互作用，包括各种纺丝条件下复杂的流体相互作用动力学。将设计不同类型的并排喷丝头，并研究喷丝头几何形状对纤维形成的影响。还将研究聚合物溶液性能和纺丝控制参数对并列纤维的机械、电气和传感性能的影响。计算流体动力学模型将用于模拟湿纺过程中喷丝板内和凝固浴中溶液的流体动力学，以简化和优化实验设计。获得的基本工艺-结构-性能关系可适用于多种聚合物溶液制造技术，包括湿纺丝、静电纺丝、直接墨水书写3D打印和微流体纺丝。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。