Novel Structural Composites Using Surface Grown Carbon Nanotubes

使用表面生长碳纳米管的新型结构复合材料

• 批准号: 0800249
• 负责人: Marwan Al-Haik
• 金额: $ 23.15万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800249&HistoricalAwards=false
• 关键词: Novel; Structural; Composites; Using; Surface

The proposed work aims to grow carbon nanotubes, using a novel technique known as Graphitic Structures by Design, on the surface of carbon fibers and fabrics toward forming hierarchical composite structures. These composites will benefit from the microscale reinforcement of carbon fibers and from the complementary nanoscale reinforcement by the nanotubes. The synthesis process is rapid, affordable, and offers controlled-growth of nanotubes and thus eliminates the problems of dispersing nanotubes in epoxies. The proposed synthesis method is the only technique that allows growth of carbon nanotubes on fiber surface at relatively low temperature (450 oC) and thus does not damage the fibers. The produced composites will be investigated at the nano, micro and macro scales, paving the way for next generation structural composites with high strength, fracture toughness and deformability long sought for durable infrastructure. The new composites will significantly enhance the shear strength of fiber reinforced polymer pre-stressing strands used in structures (e.g. bridges). Problems associated with anchoring these strands will be eliminated. Four graduate students will participate in the research toward their degrees requirements. Four multi-disciplinary courses are planned as part of the proposed research activities to benefit students in Mechanical and Civil Engineering departments. The two departments have more than 40% minority population (Hispanic and Native American) and more than 20% of our students are females. The results of this work will be communicated to students at math/science charter high schools located in the state of New Mexico.

拟议的工作旨在使用一种称为“图形结构设计”的新技术在碳纤维和织物的表面生长碳纳米管，以形成分层复合结构。这些复合材料将受益于碳纤维的微米级增强和纳米管的互补纳米级增强。该合成过程快速、经济且可控制纳米管的生长，从而消除了纳米管在环氧树脂中分散的问题。所提出的合成方法是唯一允许碳纳米管在相对较低的温度（450 oC）下在纤维表面生长的技术，因此不会损坏纤维。所生产的复合材料将在纳米、微观和宏观尺度上进行研究，为下一代具有高强度、断裂韧性和可变形性的结构复合材料铺平道路，而这些是耐用基础设施长期以来所寻求的。新型复合材料将显着提高结构（例如桥梁）中使用的纤维增强聚合物预应力绞线的剪切强度。与锚定这些股线相关的问题将被消除。四名研究生将参与其学位要求的研究。作为拟议研究活动的一部分，计划开设四门多学科课程，以使机械和土木工程系的学生受益。这两个系的少数民族人口（西班牙裔和美洲原住民）超过 40%，超过 20% 的学生是女性。这项工作的结果将传达给位于新墨西哥州数学/科学特许高中的学生。