Ionoelastomer heterojunctions at the micro- and nano-scale

微米和纳米尺度的离子弹性体异质结

• 批准号: 2104892
• 负责人: Ryan Hayward
• 金额: $ 46.07万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2104892&HistoricalAwards=false
• 关键词: Ionoelastomer; heterojunctions; micro; nano; scale

NON-TECHNICAL SUMMARY:Soft polymer networks that can conduct currents through motion of ionic species hold potential for the development of new classes of materials and devices. Recent work has focused on the interface formed when one material bearing fixed positive (and therefore mobile negative) ions is placed in contact with another bearing fixed negative (and mobile positive) ions. Such interfaces act much like the electronic gates found in modern electronic devices, which allow current to pass in one direction, but not the other. However, interfaces based on soft ion-conducting polymers offer other interesting properties, such as the ability to reversibly stick and release with the application of a small voltage, and the ability to generate currents when mechanically deformed. This project seeks to deepen our understanding of this emerging class of materials, and to thereby open the door to new types of devices built from them. To do so, it will develop a library of ion-conducting polymers and characterize how the behavior of the resulting interfaces depends on the polymer characteristics. It will provide insight into the tendency of these oppositely charged polymers to mix, or not mix, and use this knowledge to engineer systems that spontaneously assemble into junctions with improved performance. The project will provide opportunities for training and mentoring of students and researchers from the high school to post-doctoral levels, and will partner with nearby high schools and several organizations at the University of Colorado Boulder to engage, recruit, and retain a diverse group of participants.TECHNICAL SUMMARY:Crosslinked networks of polyelectrolytes with low glass transition temperatures formed from ionic liquid monomers, or ‘ionoelastomers’, have recently emerged as a promising class of soft ion conductors. While recent work has shown that heterojunctions between polyanionic and polycationic materials serve as inherently stretchable ionic diodes, enabling the formation of transistors, low-voltage electroadhesives, and electro-mechanical transducers, much remains to be understood about their operation. This project will establish a library of copolymers with varying content of different ionic charge carriers and different backbone chemistries, and characterize how the behavior of the resulting ionoelastomer heterojunctions depends on these characteristics. It will characterize the tendency of poly(ionic liquid) blends and block copolymers to mix, or undergo micro- or macro-phase separation, as a function of these parameters as well. Finally, it will establish routes based on self-assembly and photochemical patterning of ionic species to yield high surface area nano- and micro-scale heterojunctions, offering potentially dramatic improvements in the performance of the resulting 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.

非技术摘要：可以通过离子物种运动进行电流的软聚合物网络具有开发新的材料和设备的潜力。当一种带有固定阳性（以及移动负）离子与另一种轴承固定负（和移动阳性）离子接触时，最近的工作集中在形成的界面上。这样的接口的作用与现代电子设备中发现的电子大门相似，后者允许电流沿一个方向传递，但不能通过另一个方向。但是，基于软离子传导聚合物的接口提供了其他有趣的属性，例如，使用小电压的应用可逆地粘附和释放的能力，以及在机械变形时产生电流的能力。该项目旨在加深我们对这种新兴材料类别的理解，从而为从中构建的新设备开辟了大门。为此，它将开发一个离子传导聚合物的库，并表征所得接口的行为如何取决于聚合物特征。它将提供有关这些带电聚合物混合或不混合的趋势的洞察力，并将这些知识用于负责汇集到具有改善性能的交界处的工程师系统。该项目将为从高中到博士后水平的学生和研究人员提供培训和心理化的机会，并将与附近的高中和科罗拉多大学大学的几个组织合作，以参与，招募和保留一组参与者的参与者。技术摘要。成为软离子导体的承诺类。虽然最近的工作表明，聚苯二醇和多阳离子材料之间的异质界化是可固有的可拉伸离子二极管，从而使变压器的形成，低压选举嵌合质和电力传感器的形成，但仍可以为其运行而理解。该项目将建立一个共聚物的库，这些共聚物具有不同的离子电荷载体和不同的骨干化学含量，并表征所得的Ionoelastomer异构体异构体的行为如何取决于这些特征。它将表征聚（离子液体）混合物的趋势并阻止共聚物混合或经过微相或宏观相分离，这也是这些参数的函数。最后，它将基于离子物种的自组装和光化学模式建立途径，以产生高表面积的纳米纳米和微尺度异质界，从而有可能对所得设备的性能进行显着改善。该奖项反映了NSF的法定使命，并通过使用基金会的知识分子优点和更广泛的影响评估标准来评估我们是否被认为是诚实的支持。

项目成果

Ionoelastomers at Electrified Interfaces: Differential Electric Double-Layer Capacitances of Cross-Linked Polymeric Ions and Mobile Counterions

• DOI: 10.1021/acs.macromol.3c01092
• 发表时间: 2023-09
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Heewoon Shin;Jowon Shin;R. C. Hayward;H. Kim

Pendent Sulfonylimide Ionic Liquid Monomers and Ionoelastomers via SuFEx Click Chemistry

• DOI: 10.1021/acs.chemmater.3c02038
• 发表时间: 2023-11
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Owen A. Lee;M. K. McBride;Matthew Ticknor;Joshua Sharpes;R. C. Hayward