CAREER: Thermomechanical Property Control of Confined Conjugated Polymeric Thin Films

职业：限域共轭聚合物薄膜的热机械性能控制

• 批准号: 2047689
• 负责人: Xiaodan Gu
• 金额: $ 59.35万
• 依托单位: University of Southern Mississippi
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-05-01 至 2026-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2047689&HistoricalAwards=false
• 关键词: CAREER; Thermomechanical; Property; Control; Confined

This project is jointly funded by the Polymers Program in the Division of Materials Research and by the Established Program to Stimulate Competitive Research (EPSCoR).NON-TECHNICAL SUMMARYUnderstanding the dynamics of electronically active polymeric materials is crucial for the development of next-generation foldable and deformable electronic devices. It is also envisioned that in the near future implantable electronic devices could provide unique interfaces between the human body and emerging electronics, thus restoring lost human function, such as hearing, vision, and bodily movement. However, there are no established design roles to understand, control, and predict the softness and pliability of such new electronically active materials. This project aims to address this challenge by developing fundamental new knowledge on the dynamics of polymer macromolecules and thus provide a pathway to make ultra-soft electronics that can enable the next generation of soft electronic devices for future wearables and implants. The researchers at the University of Southern Mississippi will develop, test, and validate new electronically active polymers using special instrumentation and develop new models to predict and control their softness. The research will include development of design rules to achieve tunable control of the electronic and mechanical properties of semiconducting polymers by measuring, understanding, and manipulating their mechanical properties and molecular entanglement behavior.In addition to research involvement of graduate and undergraduate students, the educational effort of the project would implement an integrated and curiosity-driven virtual and in-person education platform on polymeric and optoelectronic materials to local K-12 students, including school districts comprising a majority of underrepresented students. Broader impacts will also include a focused Southern U.S. X-ray/neutron scattering workshop to bring new scientific techniques to the local scientific community.TECHNICAL SUMMARY Organic semiconductors based on conjugated polymers exhibit unique optoelectronic properties and have been widely applied in a broad range of applications for efficient lighting, health care, energy harvesting, and storage. Despite promising advances in their optoelectrical properties, the ability to predict and control thermomechanical properties is lagging behind. Thus, the overall goal of this project is to develop new design rules to achieve tunable control of the electronic and mechanical properties of conjugated polymers by measuring, understanding, and manipulating their glass transition temperature as well as their molecular entanglement behavior. Researchers at the University of Southern Mississippi will target the following goals: 1) accurately determine the glass transition temperature for conjugated polymers and its influence on the mechanical properties in both device-relevant thin-film confined states and bulk state; 2) illustrate the design rules for engineering highly entangled polymer chains to understand the role entangled semi-rigid chains have on final fracture behavior of free-standing thin films under confinement; and 3) understand the deformation mechanism of semi-rigid conjugated polymers using multimodal in-situ spectroscopy and scattering techniques, and thus guide the design of future deformable electronics. The fundamental knowledge gained through this project will lead to precise control of the thermomechanical properties of conjugated polymers, thus contributing to the development of future soft robotics, implantable health care, and robust energy harvesting devices..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.

该项目是由聚合物计划在材料研究划分和刺激竞争性研究（EPSCOR）的既定计划中共同资助的。对电子活动性聚合物材料的动力学的Non-Technical汇总对下一代可折叠和可变形的电子设备的发展至关重要。还可以预见的是，在不久的将来，可植入的电子设备可以在人体和新兴电子产品之间提供独特的界面，从而恢复失去的人类功能，例如听力，视力和身体运动。 但是，没有建立的设计角色可以理解，控制和预测这种新型电子活动材料的柔软性和柔性性。该项目旨在通过开发有关聚合物大分子动力学的基本知识来应对这一挑战，因此提供了制造超柔软电子产品的途径，以使下一代的软电子设备能够为将来的可穿戴设备和植入物提供。 南密西西比大学的研究人员将使用特殊仪器开发，测试和验证新的电子活动聚合物，并开发新的模型来预测和控制其柔软度。 这项研究将包括制定设计规则，以通过衡量，理解和操纵其机械性能和分子纠缠行为来实现对半导体聚合物的电子和机械性能的可调节控制。除了研究毕业生和本科生的研究参与外，该项目的教育努力还将对本地材料进行材料和好奇的教育和好奇的教育和好奇的教育，并将学生，包括大多数代表性不足的学生的学区。更广泛的影响还将包括一个重点的美国X射线/中子散射车间，将新的科学技术带入当地科学界。基于共轭聚合物的技术摘要有机物半导体具有独特的光电特性，并已广泛应用于有效的光线应用，可在有效的照明范围内进行照明，保健，能源保健，摄取和存储，并进行了摄影，并进行了摄影，以及。尽管他们的光电特性有望取得进步，但预测和控制热力学特性的能力仍在落后。因此，该项目的总体目标是制定新的设计规则，以通过测量，理解和操纵其玻璃过渡温度以及它们的分子纠缠行为来实现对共轭聚合物的电子和机械性能的可调节控制。密西西比州南部大学的研究人员将针对以下目标：1）准确确定共轭聚合物的玻璃过渡温度及其对与设备相关的薄膜限制状态和散装状态的机械性能的影响； 2）说明了工程高度纠缠的聚合物链的设计规则，以了解纠缠半刚性链在限制下独立薄膜的最终断裂行为中的作用； 3）了解使用多模式的原位光谱和散射技术，了解半刚性共轭聚合物的变形机理，从而指导未来可变形电子设备的设计。 通过该项目获得的基本知识将导致对共轭聚合物的热机械特性的精确控制，从而有助于开发未来的软机器人技术，可植入的医疗保健以及强大的能源收集设备。该奖项反映了NSF的法定任务，并通过对基础的智力进行了评估，以评估依据，并具有依据的评估。

项目成果

Backbone flexibility on conjugated polymer's crystallization behavior and thin film mechanical stability

• DOI: 10.1002/pol.20210462
• 发表时间: 2021-09
• 期刊: Journal of Polymer Science
• 影响因子: 3.4
• 作者: Zhiyuan Qian;Luke A. Galuska;Guorong Ma;W. McNutt;Song Zhang;Jianguo Mei;X. Gu

Achieving High Performance Stretchable Conjugated Polymers via Donor Structure Engineering

通过供体结构工程实现高性能可拉伸共轭聚合物

• DOI: 10.1002/marc.202300169
• 发表时间: 2023
• 期刊: Macromolecular Rapid Communications
• 影响因子: 4.6
• 作者: Wu, Ning;Huang, Gang;Huang, Hua;Wang, Yunfei;Gu, Xiaodan;Wang, Xiaohong;Qiu, Longzhen
• 通讯作者: Qiu, Longzhen

Bioadhesive polymer semiconductors and transistors for intimate biointerfaces

• DOI: 10.1126/science.adg8758
• 发表时间: 2023-08-11
• 期刊: SCIENCE
• 影响因子: 56.9
• 作者: Li, Nan;Li, Yang;Wang, Sihong
• 通讯作者: Wang, Sihong

Molecular Origin of Strain‐Induced Chain Alignment in PDPP‐Based Semiconducting Polymeric Thin Films

• DOI: 10.1002/adfm.202100161
• 发表时间: 2021-03
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: Song Zhang;Amirhadi Alesadi;Gage T. Mason;Kai‐Lin Chen;Guillaume Freychet;Luke A. Galuska;Yu‐Hsuan Cheng;P. B. J. St. Onge;Michael U. Ocheje;Guorong Ma;Zhiyuan Qian;Sujata Dhakal;Zachary Ahmad;Cheng Wang;Yu‐Cheng Chiu;S. Rondeau‐Gagné;W. Xia;X. Gu

Highly Deformable Rigid Glassy Conjugated Polymeric Thin Films

• DOI: 10.1002/adfm.202306576
• 发表时间: 2023-08
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: Yunfei Wang;Song Zhang;Guillaume Freychet;Zhaofan Li;Kai‐Lin Chen;Chih-Ting Liu;Zhiqiang Cao;Y. Chiu;W. Xia;X. Gu