Engineered Metastable Intermolecular Composites: Thermodynamics of Nanoparticles and Heterogeneous Combustion

工程亚稳态分子间复合材料：纳米粒子和非均相燃烧的热力学

• 批准号: RGPIN-2019-04635
• 负责人: Wen, John
• 金额: $ 2.33万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760451
• 关键词: Engineered; Metastable; Intermolecular; Composites; Thermodynamics

Metastable intermolecular composite (MIC) is a reactive composite demonstrating appealing characteristics like a high thermo-chemical sensitivity, low-energy requirement for ignition, flexible architecture, and tunable reactivity. MICs are widely investigated for both civil and defence applications, specifically as sources of power, heat, and propulsion. At the University of Waterloo, we have developed a variety of MIC formulae and architectures and studied for their ignition, energetic, and combustion characteristics, aiming to develop a miniature heating strategy to achieve pre-ignition of conventional explosives and propellants, sufficient heat supply for micro-scale component joining, and localized energy production at micro-electro-mechanical systems. Yet, only a surface understanding of MIC combustion kinetics exists; to date, underlying processes and detailed mechanisms remain only partially understood, owing to the physical and chemical complexities of heterogeneous MIC constituents and influences of their various length scales. The result is, a detailed and accurate numerical model for predicting MIC combustion and flame propagation is not available, which has significantly hindered the further development of MICs and their applications.     The long-term goals of the proposed research are to achieve artificial design of MICs for different applications and accurate control of their combustion dynamics, and to create new knowledge on dependence of MIC physicochemical and combustion properties on the type, size and stability of constituents. The proposed research will target three specific objectives in the next five years: i) developing a procedure to investigate the thermodynamics of nanoparticles (i.e., the nano-sized constituents of MICs) through theoretical modeling and experimental validation; ii) investigating and characterizing the propagation of chemical reactions within representative MIC microstructures using computer modeling; and iii) using high-speed imaging, equipped with non-intrusive temperature measurement, to visualize the flame propagation, which reveals combustion dynamics of MICs and helps develop various applications such as micro-joining and power-on-a-chip.     The proposed theoretical models and fundamental studies will enhance Canada's capacity to develop next-generation engineered MICs. The outcome of this research is expected to guide further fabrications of MIC based devices for novel applications in the micro-electro-mechanical systems, additive manufacturing, explosive detection, biomedical engineering, and defence industry. It will create a unique training opportunity for eight HQP as future engineers and researchers in industry and academia. It will help build university-industry collaborations to commercialize the MIC fabrication technologies and help grow the manufacturing scale and market of MICs in Canada.

亚稳分子间复合材料（MIC）是一种具有高的热化学敏感性、低的点火能量要求、灵活的结构和可调的反应活性的反应性复合材料。MIC在民用和国防应用中得到了广泛的研究，特别是作为动力，热量和推进力的来源。在滑铁卢大学，我们已经开发了各种MIC公式和架构，并研究了它们的点火，能量和燃烧特性，旨在开发一种微型加热策略，以实现常规炸药和推进剂的预点火，为微尺度组件连接提供足够的热量，并在微机电系统中进行本地化能源生产。然而，只有表面的了解MIC燃烧动力学存在，到目前为止，基本的过程和详细的机制仍然只有部分了解，由于非均质MIC成分的物理和化学的复杂性和它们的各种长度尺度的影响。结果是，没有一个详细和准确的数值模型来预测MIC燃烧和火焰传播，这大大阻碍了MIC的进一步发展和应用。 拟议的研究的长期目标是实现人工设计的MIC为不同的应用和准确控制其燃烧动力学，并创建新的知识MIC的物理化学和燃烧性能的依赖类型，大小和稳定性的成分。拟议的研究将在未来五年内针对三个具体目标：i）开发一个程序来研究纳米颗粒的热力学（即，MIC的纳米级成分）; ii）使用计算机建模研究和表征在代表性MIC微结构内的化学反应的传播;和iii）使用配备非侵入式温度测量的高速成像来可视化火焰传播，其揭示了MIC的燃烧动力学，并有助于开发各种应用，如微连接和芯片供电。 拟议的理论模型和基础研究将提高加拿大开发下一代工程MIC的能力。这项研究的结果预计将指导MIC为基础的设备在微机电系统，增材制造，爆炸物检测，生物医学工程和国防工业的新应用的进一步制造。它将为八名HQP创造一个独特的培训机会，作为工业和学术界未来的工程师和研究人员。它将有助于建立大学与工业的合作，使MIC制造技术商业化，并有助于扩大加拿大MIC的制造规模和市场。