NER: Bio-inspired Synthesis of Novel Porous Carbon Nanotubes

NER：新型多孔碳纳米管的仿生合成

• 批准号: 0508293
• 负责人: Hong Yang
• 金额: $ 10万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508293&HistoricalAwards=false
• 关键词: NER; Bio; inspired; Synthesis; Novel

University of Rochester Carbon nanotubes are important active components in various novel applications such as nanocomposites, supporting materials for electrode catalysts in low-temperature fuel cells, filtration and separation. Structural modification and surface functionality of carbon nanotubes are pivotal to many of these applications. This project focuses on a bio-inspired synthesis of novel porous carbon nanotubes (pCNTs) starting from the surfactant assembly that resembles those structures of biolipid tubes formed in Nature. The project aims at the development of pCNTs from porous Langmuir-Blogdett (LB) films of various fatty acids, the understanding of the formation mechanism and preliminary data on the structure-property relationship.Intellectual MeritIn this project, the PI will explore a bio-inspired approach, based on the self-assembly and template principles, to synthesis of porous carbon nanotubes with different surface functional groups and chemical compositions, degree of crystallinity. He hypothesizes that self-assembled porous surfactant layers with homogenous thickness can be used as precursor structure in the creation of nanotubes upon conversions to carbon nanotubes at the elevated temperatures when organic surfactants being to decompose (~450). He further hypothesizes that the film to nanotube formation is driven by the stain gradients created between the top and bottom of the organic films and the van der Waals forces at the molecular level and during the carbonization process. The specific aims are: 1) Generation of supported porous Langmuir-Blodgett (LB) films of various carboxylic acid surfactants on templates of anodized aluminum oxide (AAO) nanoporous membranes; 2) Conversion of these porous LB thin films into porous carbon nanotubes under various synthetic conditions, such as temperature, thickness of LB films and the type of surfactants (alkene and aromatic ring- containing chains); and 3) Prelimiary porosity, gas absorbance and conductivity characterizations of porous carbon nanotubes are to be made.Broader ImpactThe program will contribute to the development of functional carbon nanotubes. Such materials are critically important in the areas of advanced carbon nanotube fibers and composites, advanced separation and filtration techniques, novel components for fuel cell catalysts which will impact in automobile, aerospace, microelectronic, fine chemical and pharmaceutical industries, and in the advancement of hydrogen economy.Course modules on the bio-inspired nanomaterials will be developed and incorporated into the materials chemistry course, "the Chemistry of Advance Materials" offered to graduate and undergraduate students from several Departments at the University of Rochester. Undergraduate and high school students will be given opportunities to conduct research on related projects through summer internship programs. To reach out for under-representative high school students, the PI will work with the University administrations and local organizations to recruit economically disadvantaged students and prepare them to be the future workforce in the interdisciplinary fields of nanotechnology. His group will strengthen the partnership with Pittsford High School Career Intern Program, and American Chemical Society (ACS) Rochester Section Project SEED program which attracts a large number of high school students from Western New York region. The dissemination of research results will be carried out through the publication in refereed journals, presentation at conferences and workshops, invited lectures, and organization of topical symposia.

罗切斯特大学碳纳米管是各种新颖应用中的重要活性成分，例如纳米复合材料、低温燃料电池电极催化剂的支撑材料、过滤和分离。 碳纳米管的结构改性和表面功能对于许多此类应用至关重要。 该项目的重点是新型多孔碳纳米管（pCNT）的仿生合成，从表面活性剂组装开始，类似于自然界中形成的生物脂质管的结构。 该项目旨在从各种脂肪酸的多孔 Langmuir-Blogdett (LB) 薄膜中开发 pCNT，了解其形成机制并提供结构-性能关系的初步数据。启发方法，基于自组装和模板原理，合成具有不同表面官能团和化学组成、结晶度的多孔碳纳米管。 他假设，厚度均匀的自组装多孔表面活性剂层可用作在有机表面活性剂分解（约450℃）的高温下转化为碳纳米管后生成纳米管的前驱体结构。 他进一步假设薄膜到纳米管的形成是由有机薄膜顶部和底部之间产生的染色梯度以及分子水平和碳化过程中的范德华力驱动的。 具体目标是：1）在阳极氧化铝（AAO）纳米多孔膜模板上生成各种羧酸表面活性剂的支撑多孔Langmuir-Blodgett（LB）薄膜； 2)在各种合成条件下将这些多孔LB薄膜转化为多孔碳纳米管，例如温度、LB膜的厚度和表面活性剂的类型(烯烃和含芳香环的链)； 3）对多孔碳纳米管的孔隙率、气体吸收率和电导率进行初步表征。更广泛的影响该项目将有助于功能性碳纳米管的开发。 此类材料在先进碳纳米管纤维和复合材料、先进分离和过滤技术、燃料电池催化剂新型组件等领域至关重要，这些领域将影响汽车、航空航天、微电子、精细化工和制药行业，以及氢的发展仿生纳米材料的课程模块将被开发并纳入材料化学课程“高级材料化学”，为罗切斯特大学多个系的研究生和本科生提供。 本科生和高中生将有机会通过暑期实习项目进行相关项目的研究。 为了帮助代表性不足的高中生，PI 将与大学管理部门和当地组织合作，招募经济困难的学生，并帮助他们成为纳米技术跨学科领域的未来劳动力。 他的团队将加强与皮茨福德高中职业实习生计划和美国化学会 (ACS) 罗切斯特分部项目 SEED 计划的合作关系，该计划吸引了大量来自纽约西部地区的高中生。 研究成果的传播将通过在参考期刊上发表、在会议和研讨会上发表、邀请讲座以及组织专题研讨会等方式进行。