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Scalable Nanomanufacturing of Two-Dimensional Materials by High Speed Compressible Gas Flow Exfoliation

通过高速可压缩气流剥离二维材料的可扩展纳米制造

基本信息

批准号：
1762507
负责人：
Duane Hixon
金额：
$ 39.86万
依托单位：
University of Toledo
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-06-01 至 2022-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1762507&HistoricalAwards=false
关键词：
Scalable Nanomanufacturing Two Dimensional Materials

项目摘要

Two-dimensional materials are atomic layer thick nanomaterials that have unusual electrical, photonic and mechanical properties. Graphene, boron nitride, and molybdenum disulfide are examples of two-dimensional materials that are finding numerous applications in next-generation electronics, composites, consumer goods, energy generation, and healthcare. One of the main barriers to commercial adoption of two-dimensional materials is the lack of scalable nanomanufacturing processes that can take a lab bench process and put it on the factory floor. This project offers new knowledge for addressing this challenge via fundamental research on a novel method that entails rapidly producing flakes or nanosheets of two-dimensional materials by employing high-pressure gas flow. Unlike the wide assortment of existing methods that require time based treatment, this new two-dimensional material nanomanufacturing process is rapid and continuous, thus providing the high throughput production capacity demanded by plant-based manufacturing. In addition, this process is environmentally friendly and produces materials of quality that is either better than or comparable to those produced by existing methods. The results of this work advances the nation's prosperity and security by boosting competitiveness of U.S. manufacturing efforts on the international stage and promoting broader adoption of two-dimensional materials into next-generation nanotechnology-enabled products. The project is multidisciplinary and involves manufacturing, fluid dynamics, computational simulations, and materials science. Several graduate and undergraduate students are trained in these disciplines through this project. The research multidisciplinary approach and outreach activities jointly help in broadening participation of women and underrepresented minority students in advanced research and significantly impact engineering education.Compressible flow exfoliation produces few layered two-dimensional (2D) materials in a continuous manner using a high-pressure multiphase gas flowing through a narrow orifice, followed by collection in a suitable solvent. This project fills the knowledge gap on the mechanisms and scalability of exfoliation in the presence of a rapidly expanding gaseous phase. In particular, it contributes to the knowledge of how 2D materials interact and fragment in the presence of high shear and shockwaves. This research involves performing process experiments guided by gas dynamics principles and computational fluid dynamic simulations that test the high shear rate exfoliation hypothesis. Throughput, yield and flake quality of the processed 2D materials are optimized and their link to the gas, particle and post-processing colloid characteristics are established. The feasibility of the compressible flow exfoliation approach are demonstrated by integrating the processed 2D materials into next-generation nanotechnology-enabled systems such as gas-barrier nanocomposite films and electrically conductive inks for printable electronics.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.

二维材料是原子层厚的纳米材料，具有不寻常的电学，光子学和机械性能。石墨烯，氮化硼和二硫化钼是二维材料的例子，在下一代电子产品，复合材料，消费品，能源生产和医疗保健中有许多应用。二维材料商业化的主要障碍之一是缺乏可扩展的纳米制造工艺，可以采用实验室工作台工艺并将其放在工厂车间。该项目通过对一种新方法的基础研究来应对这一挑战，该方法需要通过采用高压气流快速生产二维材料的薄片或纳米片。与需要基于时间的处理的各种现有方法不同，这种新的二维材料纳米制造过程是快速和连续的，从而提供了基于植物的制造所需的高吞吐量生产能力。此外，该工艺是环境友好的，并且生产的材料质量优于或相当于通过现有方法生产的材料。这项工作的成果通过提高美国制造业在国际舞台上的竞争力，促进二维材料在下一代纳米技术产品中的广泛采用，促进了国家的繁荣和安全。该项目是多学科的，涉及制造，流体动力学，计算模拟和材料科学。一些研究生和本科生通过这个项目接受这些学科的培训。研究多学科的方法和推广活动共同有助于扩大妇女和代表性不足的少数民族学生在先进的研究和显着影响工程教育的参与。可压缩流剥离生产几个分层的二维（2D）材料在连续的方式使用高压多相气体流过一个狭窄的孔，然后收集在一个合适的溶剂。该项目填补了在快速膨胀的气相存在下剥离的机制和可扩展性的知识空白。特别是，它有助于了解2D材料如何在高剪切和冲击波的存在下相互作用和破碎。这项研究涉及执行过程中的气体动力学原理和计算流体动力学模拟，测试高剪切速率剥离假设的指导下的实验。优化处理后的2D材料的产量、产率和薄片质量，并建立它们与气体、颗粒和后处理胶体特性的联系。可压缩流剥离方法的可行性通过将加工的2D材料集成到下一代纳米技术支持的系统中来证明，例如用于可印刷电子产品的气体阻隔纳米复合材料薄膜和导电油墨。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估而被认为值得支持。