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: $ 2.84万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=644358
• 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.

形状记忆聚合物 (SMP) 可以存储临时形状，并在施加外部刺激（例如热量）时恢复其原始形状，与形状记忆合金等其他形状记忆材料相比，SMP 具有重要的优势。相对较高的应变恢复能力、更容易定制的特性和可制造性，它们在无人机（UAV）、变形飞机部件和生物医学支架等应用中具有巨大的潜力。其更广泛的用途是其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”中作为湿度、温度等函数的性能的基本了解。这些重要方面需要解决和记录***大多数 SMP 都会受到湿度的影响；因此，我们进行了详细的研究以确定其对 SMP 的影响。使用基于挤出的增材制造打印的 SMP 属性的打印参数(EBAM) 技术。SMP 复合材料 (SMPC) 是增强型 SMP，与 SMP 相比，我的团队多年来一直致力于通过 EBAM 技术生产多功能 SMPC。根据我们所开发的知识和专业知识，该提案旨在解决上述缺点。***拟议研究计划的主要目标是：(a) 使用 EBAM 生产和表征纤维增强 SMPC；(b) 开发模型到预测 SMPC 的特性；(c) 生产带有集成加热元件的 SMPC，以促进现场激活，并研究加热元件的电阻以实现结构健康监测 (SHM) 能力。*** 该计划的新颖性和意义源于它对 SMPC 提供强有力的分析和实验理解的承诺，这不仅为本项目提供了一个大型实验数据库，也为未来几年与 SMPC 合作的研究人员和工程师提供了一个大型实验数据库。不幸的是，目前文献中缺少简单而准确的模型所提出的活化技术和 SHM 功能将使这些新型材料真正经过多功能 SMPC 测试，该提案旨在成为该领域的一项开创性工作，该提案将为通过促进科学知识将这些材料从实验室带到实际现场应用提供一条前进的道路。 SMPC 在所讨论的战略关键应用中的使用将为加拿大和世界各地的知识进步做出重大贡献。