Mechanics of Bioderived-Cellulose-Based Ultra-Strong and Ultra-Tough Materials

生物纤维素基超强超韧材料的力学

• 批准号: 1936452
• 负责人: Teng Li
• 金额: $ 45万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936452&HistoricalAwards=false
• 关键词: Mechanics; Bioderived; Cellulose; Based; Ultra; Mechanics; Bioderived; Cellulose; Based; Ultra

This research program will focus on exploring design strategies to achieve ultra-strong and ultra-tough materials based on bioderived cellulose. Cellulose is the most abundant biopolymer on Earth and has long been used to produce paper products. Cellulose has remarkable mechanical properties, making it as a promising building block for high performance functional and structural materials. While plants are the common source of cellulose, it requires extra physical and chemical processing to isolate and purify cellulose from plants, and such processing can potentially decrease the mechanical performance of plant cellulose. Moreover, trees often take years or decades to mature, posing substantial time cost to plant cellulose. Bioderived Cellulose produced through a microscopic organism enabled fermentation process is chemically 100% pure with much better properties than plant cellulose and can be obtained at industrial scale at a low cost within days. This research program aims to use both experimental and computational studies to investigate the fundamental science that governs the superb mechanical properties of bioderived cellulose. The success of this research program can potentially lead to a low-cost and long-sought solution in designing high performance engineering materials. The research will also be complemented by establishing a well-rounded educational and outreach program including research opportunities for graduate and undergraduate students, internship for underrepresented minority high school students, public outreach at the annual Maryland Day, and research dissemination via cyberinfrastructure. The specific goal of this research program is (a) to explore a promising but largely unexplored strategy to enhance the mechanical properties of bioderived cellulose materials via ion infiltration, and (b) to decipher the fundamental correlation of the superb mechanical properties of bioderived cellulose materials with cellulose fiber length/alignment and water content. The research will be conducted via a coherent research framework integrating experiments and multiscale modeling. By revealing the fundamental science of the superb intrinsic mechanical properties of cellulose, the project holds promise to drive a paradigm shift in the usage of cellulose beyond its conventional way. The new knowledge generated from this research program will shed light fertile opportunities to exploit the full potential of the intrinsic superb mechanical properties of cellulose, the most abundant biopolymer on Earth. The fundamental scientific understanding emerging from this study can enrich the disciplines of mechanics of materials with multiple tantalizing research frontiers and be readily adapted and generalized to other material systems.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.

该研究计划将着重于探索设计策略，以实现基于生物层次的纤维素的超强和超阻-Tough材料。纤维素是地球上最丰富的生物聚合物，长期以来一直用于生产纸张产品。纤维素具有显着的机械性能，使其成为高性能功能和结构材料的有前途的基础。虽然植物是纤维素的常见来源，但它需要额外的物理和化学加工来分离和纯化纤维素，从而可以潜在地降低植物纤维素的机械性能。此外，树木通常需要数年或数十年才能成熟，构成了植物纤维素的大量时间。通过微观生物体生产的生物纤维素在化学上是100％纯的，其性能比植物纤维素更好，并且可以在工业尺度上以低成本在几天内以低成本获得。该研究计划旨在同时使用实验和计算研究来研究控制生物培养纤维素的精湛机械性能的基本科学。该研究计划的成功可能会导致设计高性能工程材料的低成本和长期解决方案。这项研究还将通过建立全面的教育和推广计划来补充，包括研究生和本科生的研究机会，针对人数不足的少数民族高中生实习，在马里兰州年度的公共宣传以及通过Cyber​​infrastruct的研究传播。该研究计划的具体目标是（a）探索一种有希望但未开发的策略，以通过离子浸润来增强生物培养的纤维素材料的机械性能，以及（b）破译与纤维素光纤长度/对准纤维纤维长度/对准纤维纤维纤维纤维材料的超级机械性能的基本相关性。该研究将通过集成实验和多尺度建模的连贯研究框架进行。通过揭示纤维素出色的内在机械性能的基本科学，该项目有望推动纤维素使用范式的范式转移，超出其传统方式。该研究计划产生的新知识将摆脱肥沃的机会，以利用纤维素的内在出色机械性能的全部潜力，纤维素是地球上最丰富的生物聚合物。这项研究中提出的基本科学理解可以丰富具有多种诱人研究边界的材料力学学科，并很容易对其他材料系统进行调整和概括。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估来通过评估来支持的，审查了审查标准。