CAREER: Durable Biomimetic Adhesives for Structural Engineering Applications

职业：用于结构工程应用的耐用仿生粘合剂

• 批准号: 2047736
• 负责人: Jovan Tatar
• 金额: $ 59.9万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2026-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2047736&HistoricalAwards=false
• 关键词: CAREER; Durable; Biomimetic; Adhesives; Structural

This Faculty Early Career Development (CAREER) program will provide a new, nature-inspired and durable adhesive joints in concrete structures by mimicking mussel adhesion. Adhesive joints are used in multiple engineering fields to accelerate production, prolong product life, reduce stress concentrations, and control maintenance costs. Structural engineering, however, relies on bulkier and less economical mechanical joining methods as the existing adhesives are not durable in wet environments. Inspired by mussels’ ability to establish and maintain adhesion to mineral substrates underwater, this project will create a moisture-resistant adhesive joining method for structural concrete. This progress in adhesives technology will (1) improve resilience of existing infrastructure by enabling innovative, durable repair and retrofitting methods and (2) stimulate the advancement of disruptive construction techniques (e.g., additive manufacturing and prefabricated construction) for affordable housing and next-generation civil infrastructure. The project integrates research in biomimetic adhesion with an educational program to attract and retain highly creative STEM talent, contributing to a workforce that can solve engineering challenges of the future.The project objectives are to: (1) elucidate chemical interactions responsible for mussels’ adhesion to concrete; (2) investigate energy dissipation mechanisms of mussel adhesive pad on concrete by establishing the functional relationships between mussel substrate selection, structure of the mussel adhesive pad, and the adhesive bond energy on model substrates; and, accordingly, (3) devise a novel biomimetic approach of adhesive joint design. The new fundamental knowledge will be used to create a prototype adhesive concrete joint that advances two new fabrication procedures—a synthesis route for a moisture-resistant primer, and a method of producing an adhesive with gradient stiffness. The education goal of this project is to nurture a cadre of highly creative engineers and materials scientists by broadening participation of neurodiverse students who innately exhibit greater creativity than the neurotypical population. Correspondingly, the project implements: (1) hands-on outreach activities that embody Universal Design for Learning (UDL) principles for pre-college students; and (2) summer research internships and personalized mentoring for high-school students and first-year engineering students with Attention Deficit Hyperactivity Disorder (ADHD). The project lays the basis for the PI to achieve his long-term career goal of expanding the use of adhesive connections in structural engineering while cultivating a neurodiverse engineering workforce.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.

该教师早期职业发展（CAREER）计划将通过模仿贻贝粘附在混凝土结构中提供一种新的，自然启发的和耐用的粘合剂接头。粘合剂接头用于多个工程领域，以加速生产，延长产品寿命，减少应力集中，并控制维护成本。然而，由于现有的粘合剂在潮湿环境中不耐用，结构工程依赖于体积较大且不经济的机械连接方法。受贻贝在水下与矿物基质建立和保持粘附能力的启发，该项目将为结构混凝土创建一种防潮粘合剂连接方法。粘合剂技术的这一进步将（1）通过实现创新，耐用的维修和改造方法来提高现有基础设施的弹性，（2）刺激破坏性建筑技术的进步（例如，增材制造和预制建筑）用于经济适用房和下一代民用基础设施。该项目将仿生粘附的研究与教育计划相结合，以吸引和留住具有高度创造力的STEM人才，为解决未来工程挑战的劳动力做出贡献。项目目标是：（1）阐明负责贻贝粘附到混凝土的化学相互作用;（2）通过建立贻贝基质选择、研究了贻贝胶垫的结构和胶接结合能，并据此提出了一种新型的仿生胶接接头设计方法。新的基础知识将被用来创建一个原型的粘合剂混凝土接头，推进两个新的制造过程-一个合成路线的防潮底漆，和一种方法生产的胶粘剂与梯度刚度。该项目的教育目标是通过扩大神经多样性学生的参与，培养一批具有高度创造力的工程师和材料科学家，这些学生天生就比神经典型人群表现出更大的创造力。相应地，该项目实施：（1）为大学预科生开展实践推广活动，体现学习通用设计原则;（2）为患有注意力缺陷多动障碍的高中生和工程专业一年级学生提供暑期研究实习和个性化辅导。该项目为PI实现其长期职业目标奠定了基础，即在结构工程中扩大粘合剂连接的使用，同时培养神经多样性的工程人才。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。