CAREER: Mechanics of Damage-Tolerant Electro-Mechano-Chemically

职业：耐损伤机电化学力学

• 批准号: 1943598
• 负责人: Qiming Wang
• 金额: $ 52.37万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-05-15 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1943598&HistoricalAwards=false
• 关键词: CAREER; Mechanics; Damage; Tolerant; Electro

This Faculty Early Career Development (CAREER) grant will support fundamental research to understand the coupling of color-change, self-healing, and electro-deformation of a cephalopod-inspired damage-tolerant electro-mechano-chemically responsive elastomer. Cephalopod skins, simultaneously featuring color-change for active camouflage, self-healing of wounds and injuries, and neuron-driven muscle actuation, have recently inspired novel synthetic materials for diverse engineering applications, ranging from camouflage skins, soft robotics, flexible electronics, and thermal regulators, to biomedical devices. Despite the great potential, the design of cephalopod-skin-like synthetic materials with coupled properties remains at the trial-and-error stage without theoretical guidance. This project will fill the knowledge gap by integrating theories and experiments to provide a mechanistic and quantitative understanding of the multiphysics coupling of a new synthetic elastomer with properties of force-induced color-change, self-healing, and electro-mechanical actuation. The knowledge obtained from this project may facilitate innovations of future camouflage skins for underwater robotics and aerial vehicles. The insights from this research may also help the design of affordable anthropomorphic prostheses and artificial organs to improve the life quality of millions of disabled people. Besides, the project includes an integrated education plan to train diverse groups of next-generation engineers through a variety of avenues, including engineering curriculum development, involvement of underrepresented undergraduates and high school students via summer research programs, outreach to K-12 students and teachers at Orthopaedic Hospital Medical Magnet High School, and outreach to the general public at Los Angeles EXPO Center. The synthetic elastomer consists of flexible polymer networks crosslinked by radical-forming mechanophores diarylbibenzofuranone, expecting to simultaneously enable force-induced color-change, self-healing, and electro-mechanical actuation. The central hypothesis of the project is that the polymer-network-linked mechanophores can undergo a reversible chemical reaction to trigger dissociation-induced color-change and re-associated-induced self-healing. Driven by the hypothesis, material fabrication, multiaxial mechanical testing, electromechanical actuation, mechanochromic measurement, and corresponding analytical modeling will be integrated to reveal the profound multiphysics coupling of polymer network mechanics, scission-binding chemical reactions, and electro-mechanical interactions. Specific tasks include: (1) to understand the constitutive behavior of the synthetic elastomer, (2) to elucidate the coupling of color-change and self-healing of the elastomer under mechanical loads, and (3) to decode the coupling of color-change, self-healing, and electro-deformation when the elastomer is under electro-mechanical loads. The research effort will open promising avenues for mechanistically and quantitatively understanding a feed-back-loop coupling of multiple physical fields (mechanics, chemical reaction, and electric field) within the context of stretchable soft materials.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.

这项教师早期职业发展（职业）赠款将支持基本研究，以了解换色，自我修复和电动启发性的耐受损害的电力耐力响应弹性弹性体的耦合。 Cephalopod skins, simultaneously featuring color-change for active camouflage, self-healing of wounds and injuries, and neuron-driven muscle actuation, have recently inspired novel synthetic materials for diverse engineering applications, ranging from camouflage skins, soft robotics, flexible electronics, and thermal regulators, to biomedical devices.尽管具有巨大的潜力，但具有耦合性能的头皮系状合成材料的设计仍在试验阶段，而没有理论指导。该项目将通过整合理论和实验来填补知识差距，以提供对新合成弹性体的多物理学耦合的机械和定量理解，并具有力诱导的色彩变化，自我修复和电力力学驱动的特性。从该项目中获得的知识可能促进了未来的伪装皮肤的创新，用于水下机器人和航空车辆。这项研究的见解还可以帮助设计负担得起的拟人化假体和人造器官，以提高数百万残疾人的生活质量。此外，该项目还包括一项综合的教育计划，旨在通过各种途径培训各种下一代工程师，包括工程课程开发，通过夏季研究计划的代表性不足的本科生和高中生的参与，向Orthopedic Hospital Magdet Magnet Magnet高中的K-12学生和教师宣讲，并向Los Public Public Public Public to Los expo Centers宣传。合成的弹性体由柔性聚合物网络组成，该聚合物网络通过自由基机械算术透明培训的交联，期望同时实现力诱导的颜色变化，自我修复和电力力学致动。该项目的中心假设是聚合物网络连锁机械团可以经历可逆的化学反应，以触发解离引起的变色，并重新相关诱导的自我修复。由假设，材料制造，多轴机械测试，机电驱动，机械色素测量和相应的分析模型的驱动，将集成以揭示聚合物网络力学的深刻多个物理耦合，Scessions-RISS结合化学反应以及电力机电相互作用。具体任务包括：（1）了解合成弹性体的组成行为，（2）阐明机械载荷下弹性体的色彩变化和自我修复的耦合，以及（3）解释色彩变化，自动化，自动化，自动化以及弹性弹负荷的弹性量的弹性量。研究工作将开放有希望的途径，以在可伸展的软材料的背景下进行机械学和定量理解多个物理领域（力学，化学反应和电场）的馈回循环耦合。这项奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和广泛的影响来评估NSF的法定任务。

项目成果

Sticky Rouse Time Features the Self-Adhesion of Supramolecular Polymer Networks

• DOI: 10.1021/acs.macromol.1c00335
• 发表时间: 2021-05
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Zhiqiang Shen;Huilin Ye;Qiming Wang;M. Kröger;Ying Li

Mechanics of Stretchy Elastomer Lattices

• DOI: 10.1016/j.jmps.2022.104782
• 发表时间: 2022-01
• 期刊: Journal of the Mechanics and Physics of Solids
• 影响因子: 5.3
• 作者: Yanchu Zhang;Kunhao Yu;Kyung Hoon Lee;Ketian Li;Haixu Du;Qiming Wang

Molecular simulation-guided and physics-informed mechanistic modeling of multifunctional polymers

• DOI: 10.1007/s10409-021-01100-3
• 发表时间: 2021-05
• 期刊: Acta Mechanica Sinica
• 影响因子: 3.5
• 作者: Guang Chen;Weikang Xian;Qiming Wang;Ying Li

Growing Living Composites with Ordered Microstructures and Exceptional Mechanical Properties

• DOI: 10.1002/adma.202006946
• 发表时间: 2021-02
• 期刊: Advanced Materials
• 影响因子: 29.4
• 作者: A. Xin;Yipin Su;Shengwei Feng;M. Yan;Kunhao Yu;Zhangzhengrong Feng;Kyung Hoon Lee;Lizhi Sun;Qiming Wang

Photosynthesis-assisted remodeling of three-dimensional printed structures

光合作用辅助重塑三维打印结构

• DOI: 10.1073/pnas.2016524118
• 发表时间: 2021
• 期刊: Proceedings of the National Academy of Sciences
• 作者: Yu, Kunhao;Feng, Zhangzhengrong;Du, Haixu;Xin, An;Lee, Kyung Hoon;Li, Ketian;Su, Yipin;Wang, Qiming;Fang, Nicholas X.;Daraio, Chiara
• 通讯作者: Daraio, Chiara