Continuous Twisted Nano-fibrous Yarns for Smart Piezo-Textiles

用于智能压电纺织品的连续加捻纳米纤维纱

• 批准号: 2304785
• 负责人: Majid Minary-Jolandan
• 金额: $ 39.71万
• 依托单位: University of Texas at Dallas
• 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: 2022-10-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2304785&HistoricalAwards=false
• 关键词: Continuous; Twisted; Nano; fibrous; Yarns

Clothing, after food, is perhaps the most common human essential, and textiles are a basic aspect of human life that has not changed from their “passive” form for many decades. Current fabrics are made of passive materials such as nylon and cotton. The goal of this project is to investigate scientific foundations to realize controllable, and reproducible production of functional smart fabrics from nano-sized smart (piezoelectric) polymer yarns, and their integration with conventional fabrics. Applications of smart textiles could include power generation and storage, personal protection, sports, fashion, communication, medical and physiological monitoring applications, and the internet of things. In particular, smart piezoelectric fabrics can be used for mechanical energy harvesting, for thermal energy harvesting through the pyroelectric effect, for ferroelectric applications, as pressure and force sensors, for motion detection, and for ultrasonic sensing. Smart fabrics will have the ability to react to different physical stimuli (mechanical, electrical, thermal, etc.) and as such can interact (sense, respond, communicate, and/or adapt) with their environment. This project will address the following challenges to realize smart piezoelectric polymer fabrics: development of processing and scale-up fabrication capabilities for production of continuous (weavable, knittable, and sewable) piezoelectric yarns; significant improvement in their electromechanical conversion efficiency; and design strategies for integration and packaging of piezoelectric yarns with conventional and conductive threads. The educational objective of the project is focused on increasing the diversity in nanotechnology-STEM through summer programs for high school students. These students will be trained on nanotechnology research, in particular smart fabrics made of piezo nanofibers. In this project, a manufacturing process based on continuous electrospinning is proposed that enables continuous production of twisted yarns. A major obstacle in the utilization of piezoelectric polymers for smart fabric applications has been the low electromechanical conversion efficiency of piezo polymers (~2%) compared to the piezo ceramics (~50%), which are inherently brittle and not suitable for smart fabric applications. The scientific outcomes of this research will be the inter-relation of thermomechanical processing, percentage of crystallinity, and orientation of crystallites and elastic and piezoelectric properties of the piezoelectric nanofibers and twisted bundles. Through fabrication and processing steps combined with computational analysis, the project will produce polymer yarns with significantly enhanced piezoelectric efficiency. This will be achieved through thermomechanical processing (thermal annealing, and drawing) designed to control the morphology (percentage of crystallinity, and orientation of crystallites), and hence properties (elastic and piezoelectric properties) and performance and output power under various external loads of piezoelectric polymer fibers.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.

服装在食物之后，可能是最常见的人类必不可少的，而纺织品是人类生活的基本方面，几十年来一直没有改变其“被动”形式。当前的织物由被动材料制成，例如尼龙和棉花。该项目的目的是研究科学基础，以实现纳米尺寸智能（压电）聚合物纱线的受控和可再现功能性智能织物的生产，以及它们与常规织物的集成。智能纺织品的应用可能包括发电和存储，个人保护，体育，时尚，交流，医疗和物理监测应用程序以及物联网。特别是，智能压电织物可用于机械能量收集，用于通过pyroelectric效应进行热能收集，用于铁电应用，作为压力和力传感器，用于运动检测以及超声传感。智能织物将能够对不同的物理刺激（机械，电气，热量等）做出反应，因此可以与环境相互作用（感知，响应，交流和/或适应）。该项目将解决以下挑战，以实现智能压电聚合物织物：开发加工和规模化的面料能力，用于生产连续（可编织，可缝合和缝纫）压电纱线；机电转化效率的显着提高；以及设计与传统和导电线的压电纱集成和包装的策略。该项目的教育目标集中在通过为高中生的夏季计划通过夏季计划来增加纳米技术 - 词干的多样性。这些学生将接受纳米技术研究的培训，特别是由压电纳米纤维制成的智能织物。在这个项目中，提出了基于连续静电纺丝的制造过程。这样可以连续生产扭曲的纱线。与压电陶瓷（约50％）相比，压电聚合物用于智能织物应用的主要障碍是压电聚合物的机电转化效率低（约2％），这些陶瓷固有地易碎，不适合智能面料应用。这项研究的科学结果将是热机械加工，结晶度的百分比以及晶体的方向以及压电纳米纤维和扭曲捆绑包的弹性和压电性能的方向。通过制造和处理步骤与计算分析相结合，该项目将产生具有显着增强压电效率的聚合物纱。这将通过热力学处理（热电退火和绘画）来控制，旨在控制形态（结晶度的百分比和结晶岩的方向），因此，在各种外部载荷下，在各种外部负载下，使用了criendation sater nes dection nes nes fate datution satut of n n satfe and satution satuts satuts satuts satuts satuts satution satuts satuts satution te and the sat satution satution te and the sat fate te and the sat fate te and the sat fate sat。智力优点和更广泛的影响审查标准。