NER: A Block Copolymer Precursor Approach to Novel Functional Nanotubes

NER：新型功能纳米管的嵌段共聚物前体方法

• 批准号: 0103000
• 负责人: Jimmy Mays
• 金额: $ 10万
• 依托单位: University of Alabama at Birmingham
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0103000&HistoricalAwards=false
• 关键词: NER; Block; Copolymer; Precursor; Approach

This proposal was received in response to NSE, NSF 00-119. This Nanoscale Exploratory Research award is part of the National Nanotechnology Initiative (NNI). It will exploit self-assembly of block copolymers of styrene and 1,3-cyclohexadiene into a core-shell cylinder-in-cylinder morphology, followed by crosslinking of poly(cyclohexadiene) (PCHD) and removal of the polystyrene (PS) segments, as a means for producing novel functionalized PCHD nanotubes. PCHD may be aromatized to poly(phenylene) (PP), a strong, crystalline, and thermally stable engineering polymer. As an alternative, PCHD can be carbonized by pyrolysis. These materials will be thoroughly characterized in terms of their sized, shapes, surface chemistry and mechanical properties. To conduct this work, an interdisciplinary collaboration between the polymer chemistry group of Dr. Jimmy Mays (University of Alabama at Birmingham, UAB) and the polymer physics/morphology group of Professor Sam Gido (University of Massachusetts, UMass) is proposed.%%%Composites incorporating such nanotubes could lead to a new class of robust, lightweight, high strength materials. By controlling molecular weight and processing conditions, we should be able to create nanotubes of varying radius, wall thickness, and aspect ration. By varying the composition of the block copolymer, other shapes besides tubes (cylinders, plates) can also be made. Reactive hydroxyl groups present on the surface of these molecular objects can be used to manipulate their processing characteristics and to provide strong bonding to matrix materials. The PP nanotubes may be insulating or they may be made conducting by doping. Such materials could be used as component in a smart composite designed to transmit an electronic signal, for example, if impacted. Opto-electronic, nanoprobe, and medical applications are also envisioned for these materials.

该提案是针对NSE、NSF 00-119收到的。该纳米探索性研究奖是国家纳米技术倡议(NNI)的一部分。它将利用苯乙烯和1，3-环己二烯嵌段共聚物自组装成核-壳-筒-筒的形态，然后交联聚(环己二烯)(PCHD)和去除聚苯乙烯(PS)链段，作为一种新的功能化PCHD纳米管的制备方法。PCHD可以芳构化成聚苯撑(PP)，这是一种结晶性强、热稳定性好的工程聚合物。作为替代，PCHD可以通过热解进行碳化。这些材料将在其尺寸、形状、表面化学和机械性能方面进行彻底的表征。为了进行这项工作，建议在阿拉巴马大学伯明翰分校的吉米·梅斯博士的聚合物化学小组和马萨诸塞大学萨姆·吉多教授的聚合物物理/形态小组之间开展跨学科合作。%的复合材料包含这种纳米管，可以导致一种新的坚固、轻质、高强度的材料。通过控制分子量和工艺条件，我们应该能够制造出不同半径、壁厚和纵横比的纳米管。通过改变嵌段共聚物的组成，还可以制造除管(圆柱体、板)之外的其他形状。这些分子对象表面存在的反应性羟基可以用来操纵它们的加工特性，并提供与基质材料的牢固结合。PP纳米管可以是绝缘的，也可以通过掺杂使其导电。这种材料可以用作智能复合材料中的组件，例如，如果受到冲击，该复合材料旨在传输电子信号。这些材料还有望用于光电子、纳米探针和医学应用。