CAREER: Roll-to-Roll Fabrication of Porous Materials Using Nanobubble Templates

职业：使用纳米气泡模板卷对卷制造多孔材料

• 批准号: 1943907
• 负责人: Roseanne Warren
• 金额: $ 50万
• 依托单位: University of Utah
• 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: 2020-08-15 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1943907&HistoricalAwards=false
• 关键词: CAREER; Roll; Fabrication; Porous; Materials

This Faculty Early Career Development (CAREER) grant explores a new manufacturing approach for creating templated, nanoporous materials that is compatible with high-throughput, scalable manufacturing protocols, including roll-to-roll fabrication. Nanoporous materials are materials characterized by pore sizes in the sub-micrometer range (for reference a human hair is approximately 20 micrometers). They have many important applications in electrochemical energy storage, catalysis, ion separation and tissue engineering. In electrochemical cells, including batteries and supercapacitors, electrode pore structure is critical to achieving good transport of ions and electrons through the cell, thus enabling higher energy and power densities. While numerous methods exist for synthesizing electrodes with controlled pore structures, there is a critical need to find new approaches for fabricating templated, nanoporous materials that are compatible with the high-throughput, roll-to-roll manufacturing processes currently employed in industries such as battery production. This project explores a new porous material manufacturing approach that uses nanoscale bubble templates in place of traditional hard templating materials, thus enabling precise control over the resulting porous structure while eliminating process complexities and waste associated with removal of the hard-templating material. The research is integrated with an educational plan that supports the training of graduate and undergraduate student researchers, enhances educational opportunities in the field of nanomanufacturing, and creates new opportunities for underrepresented minority groups in STEM, with a focus on Native Hawaiian and Pacific Islander students.The specific goal of this research is to test the hypothesis that nanosized bubbles can be used as templates to fabricate meso- and macroporous materials, and that the pore structures of these materials can be precisely engineered by controlling the size distribution and position of the bubbles during the templating process. The research addresses the follow key question: Can nanoscale bubbles be used to controllably template porous structures across micro-to-millimeter thick films at manufacturing rates compatible with meter-per-second scale (i.e. roll-to-roll) processing? The research addresses gaps in current knowledge of nanobubbles, including: i) mechanisms of solid film formation at nanobubble three-phase (gas-liquid-solid) interfaces; ii) the physics of nanobubble generation and stability, and iii) the precision with which nanobubble positions can be manipulated using methods such as acoustic standing waves. The research also tests new methods for real-time investigations of nanobubbles using in-situ liquid scanning transmission electron microscopy to advance fundamental knowledge of nanobubble interfaces and stability. Overall, the research and education plans establish the PI’s long-term career in advanced manufacturing of nanoscale materials for electrochemical energy storage and other applications.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.

这位教师的早期职业发展（职业）格兰特探索了一种新的制造方法，用于创建模板，纳米多孔材料，与高通量，可扩展的制造协议兼容，包括卷到滚动制造。纳米多孔材料的材料为特征，其孔径在亚微米范围内（参考人头发约为20微米）。它们在电化学能源存储，催化，离子分离和组织工程中有许多重要的应用。在包括电池和超级电容器在内的电化学细胞中，电极孔结构对于通过细胞实现良好的离子和电子运输至关重要，从而实现了较高的能量和功率密度。尽管存在许多方法可以使电子与受控的孔结构合成电子，但至关重要的是寻找与与电池生产等行业当前使用的高通量，滚动制造工艺相兼容的模板的纳米多孔材料的新方法。该项目探索了一种新的多孔材料制造方法，该方法使用纳米级气泡模板代替传统的硬模板材料，从而可以精确控制所得的多孔结构，同时消除了与去除硬化材料相关的过程复杂性和废物。这项研究与一项教育计划融合，该计划支持培训研究生和本科生研究人员，增强了纳米制造领域的教育机会，并为STEM中代表性不足的少数群体创造了新的机会，并以夏威夷原住民和太平洋岛民的重点是该研究的特定目标，可以测试材料的特定目标，并构建了纳米式的机器人，以纳尼的构造，以纳米式的构造，探索了探光的诱惑，诱惑的是诱惑的诱惑，诱惑的探光剂是诱惑的。这些材料的孔结构可以通过控制模板过程中气泡的尺寸分布和位置来精确地设计。该研究解决了以下关键问题：纳米级气泡是否可以用来控制与每秒尺度兼容（即卷到滚动）处理的制造速率的微米到毫米厚膜的多孔结构？该研究解决了当前对纳米泡的知识的差距，包括：i）纳米泡三相（气液 - 固体）界面处固体膜形成的机制； ii）纳米泡产生和稳定性的物理学，以及ii）可以使用声波等方法来操纵纳米泡位置的精度。该研究还测试了使用原位液体扫描传输电子显微镜实时研究纳米泡的新方法，以提高纳米泡接口和稳定性的基本知识。总体而言，研究和教育计划在纳米级材料的高级制造中建立了PI的长期职业，用于电化学能源存储和其他应用。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响来通过评估来支持的。