CAREER: Impact-Adaptive Conducting Polymers

职业：冲击适应性导电聚合物

• 批准号: 1945664
• 负责人: Yue Wang
• 金额: $ 61万
• 依托单位: University of California - Merced
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945664&HistoricalAwards=false
• 关键词: CAREER; Impact; Adaptive; Conducting; Polymers

NON-TECHNICAL SUMMARY Next-generation wearable or on-skin electronics have the potential to transform personalized biomedical care by providing non-invasive, constant biometrics monitoring. Stretchable conducting polymers, a special type of plastic that conducts electricity and deforms with body movement, have become a main class of materials for such applications. However, these polymers break more easily when deformed at a faster rate because of their intrinsic mechanical properties. This is detrimental for electronics to be applied directly on human bodies since they are constantly undergoing dynamic movement. This CAREER project aims to develop a new class of adaptive stretchable conducting polymers with toughness that will scale with the rate of deformation. Specifically, the PI will explore and elucidate the fundamental chemical design principles for realizing and manipulating these adaptive mechanical properties. Successful execution of this project will lead to plastic electronics with enhanced stability, reliability, and practicality for next-generation wearable or on-skin electronics. These properties could also result in longer use cycles, and therefore reducing plastic waste and contributing to preservation of our environment. The educational objective of this project is to increase the scientific literacy in Central California, a historically underserved region, and create a more diversified future STEM workforce. Specifically, the PI will develop low-cost 3D printing tools for local K-12 students to experimenting with various classes of polymers and learn the diversity, pervasiveness, and important role that polymers play in our lives. Modified versions of these experiments will be integrated into the undergraduate curriculum at UC Merced, a Hispanic Serving Institution, to expose undergraduate students to new soft materials and educate them at the forefront of polymer science. The PI also plans to publish these outreach experiments in an education journal, with the hope of disseminating this low-cost technology to increase scientific literacy and knowledge of polymers across the globe.TECHNICAL SUMMARY A key challenge in realizing practical wearable and on-skin electronics using conducting polymers is to overcome their viscoelasticity. This strain rate-dependent property is highly detrimental as wearable and on-skin electronics made using these polymers would be prone to damage when used under conditions involving sudden movements and impact, such as during sports. This CAREER project aims to develop a set of chemical design principles for creating a new class of stretchable conducting polymers that defy this classic, unfavorable strain rate behavior. This objective will be realized by creating two competing deformation mechanisms at the molecular chain and nanoscopic domain levels. In phase I of the project, the PI will design and synthesize a number of conducting polymers with chemical structures that favor the formation of interpenetrated micelles. Different secondary interactions will be incorporated at the surface and interior of the micelles to serve as functional handles for tuning the two competing deformation mechanisms. Phase II of the project will employ a full suite of chemical, mechanical, electrical and structural characterization techniques to study these polymers. In particular, in-situ resistance/tensile/small- and wide-angle X-ray scattering will be used to decipher the structure-property relationships and deformation mechanisms at the surface and interior of the micelles across various length scales. Phase III of the project is aimed at optimizing the electrical conductivity of these impact-adaptive conducting polymers by creating effective charge transport pathways on the surface of the micelles. The polymer design principles and mechanistic insights gained through this project will lead to a body of fundamental knowledge for creating polymeric conductors that have toughness adaptive towards the degree of impact..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.

非技术摘要下一代可穿戴或皮肤电子产品有可能通过提供非侵入性的，持续的生物识别监测来改变个性化的生物医学护理。可拉伸的导电聚合物是一种特殊类型的塑料类型，可以通过身体运动进行电力和变形，已成为用于这种应用的主要材料类别。但是，由于其内在的机械性能，这些聚合物以更快的速度变形时更容易破裂。 这是对电子产品直接应用于人体的不断动态运动的有害。这个职业项目旨在开发一种具有韧性的新型自适应拉伸导电聚合物，并随变形速度而扩展。具体而言，PI将探索和阐明用于实现和操纵这些适应性机械性能的基本化学设计原理。该项目的成功执行将导致塑料电子设备具有增强的稳定性，可靠性和实用性，可用于下一代可穿戴或皮肤电子产品。这些特性也可能导致更长的使用周期，因此减少了塑料废物并有助于保护我们的环境。该项目的教育目标是提高加利福尼亚州中部历史悠久的地区的科学素养，并创造一个更加多样化的未来STEM劳动力。具体而言，PI将开发低成本的3D打印工具，供本地K-12学生尝试各种类别的聚合物，并了解聚合物在我们的生活中发挥的多样性，普遍性和重要作用。这些实验的修改版本将集成到西班牙裔服务机构UC Merced的本科课程中，以使本科生接触新的软材料并在聚合物科学的最前沿进行教育。 PI还计划在教育杂志上发布这些外展实验，希望传播这种低成本的技术，以提高全球的科学素养和对聚合物的知识。技术摘要在实现实用的可穿戴和皮肤上的电导电气中的关键挑战是要胜过其粘弹性。这种应变率依赖性的特性是高度有害的，因为在涉及突然运动和影响的条件下，例如在运动期间，使用这些聚合物制成的皮肤电子产品很容易受到损害。该职业项目旨在制定一套化学设计原理，以创建一类新的可拉伸导电聚合物，以无视这种经典，不利的应变率行为。该目标将通过在分子链和纳米镜域的水平上创建两个竞争性变形机制来实现。在该项目的第一阶段，PI将设计和合成许多具有化学结构的导电聚合物，这些聚合物有利于形成互穿的胶束。不同的二级相互作用将在胶束的表面和内部掺入，以充当调整两种竞争变形机制的功能手柄。该项目的第二阶段将采用一套化学，机械，电和结构表征技术来研究这些聚合物。特别是，原位电阻/拉伸/小角度和广角X射线散射将用于解密在各个长度尺度上表面和胶束表面和内部的结构 - 特性关系和变形机制。该项目的第三阶段旨在通过在胶束表面创建有效的电荷传输途径来优化这些冲击自适应导电聚合物的电导率。通过该项目获得的聚合物设计原理和机械洞察力将导致基本知识，以创建对影响程度的韧性的聚合物导体。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的审查审查标准来通过评估来通过评估来提供支持的。

项目成果

3D printing of conjugated polymers

• DOI: 10.1002/polb.24893
• 发表时间: 2019-10-23
• 期刊: JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
• 作者: Jordan, Robert S.;Wang, Yue
• 通讯作者: Wang, Yue

Conjugated polymers: From synthesis, transport properties, to device applications

共轭聚合物：从合成、传输特性到器件应用

• DOI: 10.1002/polb.24911
• 发表时间: 2019
• 期刊: Journal of Polymer Science Part B: Polymer Physics
• 作者: Wang, Yue Jessica;Yu, Guihua
• 通讯作者: Yu, Guihua

3D printed architected conducting polymer hydrogels

• DOI: 10.1039/d1tb00877c
• 发表时间: 2021-06-08
• 期刊: JOURNAL OF MATERIALS CHEMISTRY B
• 影响因子: 7
• 作者: Jordan, Robert S.;Frye, Jacob;Wang, Yue
• 通讯作者: Wang, Yue

Imparting High Conductivity to 3D Printed PEDOT:PSS

• DOI: 10.1021/acsapm.3c00232
• 发表时间: 2023-05
• 期刊: ACS Applied Polymer Materials
• 影响因子: 5
• 作者: Ian M. Hill;Victor Hernandez;Bohao Xu;Josiah A. Piceno;J. Misiaszek;Adrian Giglio;Emily Junez;Jiajun Chen;P. Ashby;Robert S. Jordan;Yue Wang