CAREER: High-Resolution Hybrid Printing of Wearable Heaters with Shape-Changeable Structures

职业：具有可变形结构的可穿戴加热器的高分辨率混合打印

• 批准号: 2340414
• 负责人: Yiwei Han
• 金额: $ 57.66万
• 依托单位: University of Mississippi
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-08-01 至 2029-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2340414&HistoricalAwards=false
• 关键词: CAREER; Resolution; Hybrid; Printing; Wearable

Four-dimensional (4D) printing is an emerging additive manufacturing technology that enables three-dimensional (3D) printed structures to deform between predefined shapes when exposed to certain stimuli. Currently, various 3D printing approaches are widely used to produce shape-changing objects. However, most of these processes are either complex, costly, have limited applicable materials, or offer low resolution, making them unsuitable for producing high-precision multi-material structures. To address this challenge, this Faculty Early Career Development Program (CAREER) project supports research that will build new knowledge related to high-resolution hybrid 4D printing, in which two types of printing processes are used for material deposition, and will create new methods of fabricating high-resolution multi-material shape-changing structures with precise deformations. The fundamental research could speed the development of these 4D printing systems and processes, which can lead to potential applications in aerospace, healthcare, biology, and automotive industries, with potential impact on the US economy, national health, and society. The educational objective of the project is to improve STEM education by inspiring students from minority and underrepresented groups, attracting more undergraduate students to the advanced manufacturing field, training graduate students, and providing hands-on research and demonstration opportunities to K-12 students.This CAREER project will focus on developing a hybrid 4D printing process, which integrates high-resolution electrohydrodynamic (EHD) printing and high-throughput extrusion printing to fabricate flexible structures with shape-changing capability. If successful, this project will significantly advance the scientific understanding of the complex interactions between materials and printing processes, including 1) understanding how the extrusion-printed structures affect the EHD printing process and how the in-flight speed of EHD deposition affects the resolution and impact damage on the printed shape-changing substrate; 2) studying how EHD printing voltage and printing bed temperature affect deformation capability, flexibility, and mechanical strength of structures printed with selected shape-changing materials; and 3) understanding the shape-changing mechanism for multi-material structures, and developing and evaluating feasible designs for shape-changeable flexible structures. In pre-college outreach programs (Rebel Research Scholars, Engineering Summer Academy, and Discover Engineering at UM) and other educational activities, this project will provide course materials, learning modules, and hands-on lab projects for students from K-12 to graduate level. The planned multidisciplinary research- and teaching-based education and outreach programs will link the research outcomes and students’ activities, with a goal of increasing their interest in advanced manufacturing and the needs of modern industries.This project is jointly funded by the Advanced Manufacturing program and the Established Program to Stimulate Competitive Research (EPSCoR).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.

四维（4D）打印是一种新兴的增材制造技术，其使得三维（3D）打印结构能够在暴露于某些刺激时在预定义形状之间变形。目前，各种3D打印方法被广泛用于生产形状变化的物体。然而，这些工艺中的大多数要么复杂、昂贵，适用材料有限，要么分辨率低，不适合生产高精度的多材料结构。为了应对这一挑战，该学院早期职业发展计划（CAREER）项目支持的研究将建立与高分辨率混合4D打印相关的新知识，其中两种类型的打印工艺用于材料沉积，并将创建制造高分辨率多材料的新方法具有精确变形的形状变化结构。基础研究可以加速这些4D打印系统和工艺的发展，这可能导致航空航天，医疗保健，生物和汽车行业的潜在应用，对美国经济，国民健康和社会产生潜在影响。该项目的教育目标是通过激励来自少数民族和代表性不足的群体的学生，吸引更多的本科生进入先进制造领域，培养研究生，并为K-12学生提供动手研究和演示的机会来改善STEM教育。这个CAREER项目将专注于开发混合4D打印工艺，其集成了高分辨率电流体动力（EHD）打印和高通量挤出打印以制造具有形状改变能力的柔性结构。如果成功，该项目将大大推进对材料和打印过程之间复杂相互作用的科学理解，包括1）了解挤出打印结构如何影响EHD打印过程，以及EHD沉积的飞行速度如何影响打印变形基底上的分辨率和冲击损伤; 2）研究EHD打印电压和打印床温度如何影响用所选形状改变材料打印的结构的变形能力、柔性和机械强度; 3）了解多材料结构的变形机理，开发和评估变形柔性结构的可行性设计。在大学预科外展计划（反叛研究学者，工程夏季学院和UM发现工程）和其他教育活动中，该项目将为从K-12到研究生水平的学生提供课程材料，学习模块和动手实验室项目。计划中的多学科研究和教学为基础的教育和推广方案将把研究成果和学生的活动联系起来，旨在提高他们对先进制造业的兴趣和现代工业的需求。该项目由先进制造计划和刺激竞争力研究的既定计划（EPSCoR）共同资助该奖项反映了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，被认为值得支持。