Multifunctional shape memory polymer composites: laboratory to reality via additive manufacturing

多功能形状记忆聚合物复合材料：通过增材制造从实验室走向现实

• 批准号: RGPIN-2018-06309
• 负责人: Ayranci, Cagri
• 金额: $ 5.68万
• 依托单位: University of Alberta
• 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=760135
• 关键词: Multifunctional; shape; memory; polymer; composites

Shape memory polymers (SMP) can store a temporary shape and restore their original shape upon application of an external stimulus, such as heat. SMP offer important advantages over other shape memory materials, such as shape memory alloys. Some of these advantages are lightweight, relatively higher strain recover-ability, easier tailorable properties, and manufacturability. They have the great potential to be utilized in applications, such as unmanned air vehicles (UAV), morphing aircraft components, and biomedical stents, to name a few. The bottleneck in their broader utilization is their inherently low mechanical properties and shape recovery forces (SRF), and a fundamental understanding of their properties in actual “field applications” as a function of humidity, temperature, etc. These important aspects need to be addressed and documented in detail for critical applications, and this is the main motivation behind this proposal for our research program.Most SMP are affected by humidity; therefore, we conducted detailed studies to identify its effects on SMP. Additionally, we studied the effect of print parameters on the properties of the SMP printed using extrusion based additive manufacturing (EBAM) technique. SMP-composites (SMPC) are reinforced SMP and have higher mechanical properties and SRF compared to SMP. My group has been working towards production and characterization of multifunctional SMPC produced by EBAM technique for a number of years. Building on to the knowledge and expertise we have developed, this proposal is prepared to address the aforementioned shortcomings.The main objectives of the proposed research program are: (a) to produce and characterize fiber reinforced SMPC using EBAM; (b) to develop a model to predict the properties of SMPC; (c) to produce SMPC with integrated heating elements to facilitate field activations, and to investigate the resistance of the heating elements for structural health monitoring (SHM) capability.The novelty and significance of the proposed program originate from its promise to provide a strong analytical and experimental understanding of the SMPC. This will provide a large experimental database not only for this program but also for the researchers and engineers that work with SMPC for years to come. The analytical model will be a simple yet accurate model that is unfortunately currently missing in the literature and intended to be a pioneering work in the field. The proposed activation technique and SHM capabilities will make these novel materials true multifunctional SMPC. Consequently, the proposal will provide a way forward to take these materials out of the laboratories to actual field applications by promoting scientific knowledge based use of SMPC in the aforementioned strategically critical applications. The program will make significant contributions to the advancement of knowledge in Canada and around the world.

形状的记忆聚合物（SMP）可以在应用外部刺激（例如热量）时恢复其原始形状并恢复其原始形状。 SMP比其他形状记忆材料（例如形状内存合金）具有重要的优势。其中一些优点是轻巧，相对更高的应变可恢复能力，更容易定制的特性和制造性。它们有很大的潜力用于应用程序，例如无人机（UAV），变形飞机组件和生物医学支架，仅举几例。其更广泛利用中的瓶颈是它们固有的低机械性能和形状恢复力（SRF），以及对它们在实际“现场应用”中的特性的基本理解，这是湿度，温度等的函数。需要详细解决和记录这些重要方面的关键应用程序，并且这是我们研究的主要动机，这是我们研究的主要动机。因此，我们进行了详细的研究，以确定其对SMP的影响。此外，我们研究了打印参数对使用基于扩展的添加剂制造（EBAM）技术打印SMP属性的效果。与SMP相比，SMP复合材料（SMPC）是增强的SMP，具有更高的机械性能和SRF。我的小组多年来一直致力于EBAM Technique生产的多功能SMPC的生产和表征。在我们开发的知识和专家的基础上，该建议准备解决理由的缺点。拟议的研究计划的主要目标是：（a）使用EBAM生产和表征纤维增强的SMPC； （b）开发一个模型来预测SMPC的性质； （c）生产具有集成加热元件的SMPC，以促进现场激活，并研究加热元件对结构健康监测（SHM）能力的阻力。拟议程序的新颖性和意义源自其向SMPC提供强烈的分析和实验性理解的承诺。这将不仅为该程序提供大型实验数据库，而且还为与SMPC合作的研究人员和工程师提供了一个大型的实验数据库。分析模型将是一个简单而准确的模型，不幸的是，文献中当前缺少，并打算是该领域的开创性工作。提出的激活技术和SHM功能将使这些新型材料真正多功能SMPC。因此，该提案将通过促进基于科学知识的SMPC在Priore派系中策略性批判的应用程序中促进基于科学知识的使用，从而为将这些材料从实验室中带出实际现场应用。该计划将为加拿大和世界各地的知识发展做出重大贡献。