NIRT: Tailored Fluorinated Surfactant Templates for the Design of Ordered Nanoporous Ceramics

NIRT：用于设计有序纳米多孔陶瓷的定制氟化表面活性剂模板

• 批准号: 0210517
• 负责人: Stephen Rankin
• 金额: $ 110万
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0210517&HistoricalAwards=false
• 关键词: NIRT; Tailored; Fluorinated; Surfactant; Templates

This interdisciplinary research team will address using a new class of structure directing agents, fluorinated surfactants, for the design of ordered nanoporous metal oxides and organic-inorganic hybrid materials. Fluorinated surfactants provide a novel platform for both templating of and recovery from ordered porous materials because they assemble more readily than hydrocarbon surfactants, form stable phases of low interfacial curvature, and are both hydrophobic and lipophobic. Departing from a traditional technique based on hydrocarbon surfactants we will first systematically explore the effects of fluorinated surfactant structure on the templating of porous silica. With a goal of designing surfactant-templated nanostructures with more tightly controlled pore architecture, this project will integrate molecular simulations, fluorinated surfactant synthesis, phase characterization, and materials synthesis techniques. We also will exploit the selective solubility of fluorinated species in low surface tension fluids (such as supercritical carbon dioxide) to enhance template recovery from nanoporous ceramics. Because fluorinated surfactants can be extracted under mild conditions, their use is expected to improve methods of synthesizing organic-inorganic hybrid materials with nanostructured pores.The co-assembly of molecular precursors allows the synthesis of nanostructured ceramics that approach the functionality and efficiency of biological materials. "Functionalizing" the pore walls with selected molecular fragments further enhances the potential of these inorganic materials for catalysts, separation materials, sensors and miniaturized diagnostic devices. The synergistic approach to the research and educational activities of this project will advance the fluorosurfactant-based design of new nanosystems by molecular templating and organic functionalization.This proposal was submitted in response to the solicitation "Nanoscale Science and Engineering" (NSF 01-157). The award is jointly supported through two directorates at NSF: (i) Mathematical and Physical Sciences (Division of Materials Research in the Ceramics and Solid-State Chemistry programs) and (ii) Engineering (Division of Design, Manufacture and Industrial Innovation in the Nanomanufacturing program).

这个跨学科研究团队将使用新的结构指导剂，氟化表面活性剂来解决有序的纳米多孔金属氧化物和有机无机杂交材料的设计。 氟化表面活性剂为从有序的多孔材料中的模板和恢复提供了一个新型的平台，因为它们比烃表面活性剂更容易组装，形成了低界面曲率的稳定阶段，并且都是疏水性和脂肪恐惧症。 与基于烃表面活性剂的传统技术背道而驰，我们将首先系统地探索氟化表面活性剂结构对多孔二氧化硅模板的影响。 该项目的目标是设计具有更紧密控制的孔体结构的表面活性剂纳米结构，该项目将整合分子模拟，氟化表面活性剂合成，相表征和材料合成技术。 我们还将利用低表面张力流体（例如超临界二氧化碳）中氟化物质的选择性溶解度来增强纳米多孔陶瓷的模板恢复。 由于可以在温和条件下提取氟化的表面活性剂，因此预计它们的使用可以改善与纳米结构孔合成有机无机杂交材料的方法。分子前体的共同组装允许合成纳米结构的陶瓷，以接近生物学材料的功能和效率。 具有选定分子片段的孔壁“功能化”进一步增强了这些无机材料对催化剂，分离材料，传感器和微型诊断设备的潜力。 该项目的研究和教育活动的协同方法将通过分子模板和有机官能化来推动基于荧光外层的新纳米系统设计。该提案是针对“纳米级科学和工程学的招标”提交的（NSF 01-157）。该奖项由NSF的两个局共同支持：（i）数学和物理科学（陶瓷和固态化学计划的材料研究部）和（ii）工程（纳米制造计划中的设计，制造和工业innovation部门）。