EAGER: Poly(Ionic Liquids)

EAGER：聚（离子液体）

• 批准号: 0938957
• 负责人: Thomas Smith
• 金额: $ 16.24万
• 依托单位: Rochester Institute of Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0938957&HistoricalAwards=false
• 关键词: EAGER; Poly; Ionic; Liquids

TECHNICAL SUMMARY:Room temperature ionic liquids (RTILs) are salts with low melting points (often below room temperature), and are typically comprised of quaternary sulfonium, phosphonium, or ammonium (imidazolium, pyridinium, pyrrolidinium) cations paired with anions of low Lewis basicity (BF4-, PF6-, CF3SO3- (CF3SO2)2N-, etc.). Today the utility of RTILs in advanced electrochemical devices ranging from lithium ion batteries, to fuel cells, capacitors, solar cells and actuators is being explored. Because of the mobility of both the anionic and cationic components of ionic liquids, it is proposed that the function of such devices might be improved if solvated membranes or conventional ionic liquids were replaced by film-forming ionic liquid polymers in which the mobility of the ions is constrained. However, when the mobility of the anionic and cationic components in ionic liquids is reduced by incorporation in a polymer system, ionic conductivity is also substantially impacted. This limitation can possibly be mediated by reduction of the dimensionality of ion diffusion in nanostructured, precision block copolymers and polymer blends. The present proposal outlines options for the synthesis and characterization of ionic liquid 1,3-dialkyl-4- and 5-vinylimidazolium salts that are amenable to facile homopolymerization or incorporation as block sequences in a wide variety of vinyl- and acrylic copolymer systems. In addition, the potential device utility of polymer blends and block copolymer systems containing these imidazolium polymers is highlighted. Specific goals of the research are to synthesize and characterize families of dissymmetric, aprotic ionic liquid monomers formally derived from 1-methy-4- and 5-vinylimidazoles, 2-alkyl-1-methyl-4- and 5-vinylimidazoles and 1-methyl-4-and 5-vinylimidazole-2-propane sulfonate; elucidate options for the homopolymerization, random copolymerization and block copolymerization of these monomers; characterize the thermal and electrochemical properties of these monomers and polymers; and, study the thermal and electrical properties, and morphology of blends of polymers of 1,3-dialkyl-4-vinylimidazolium salts with PVF2.NON-TECHNICAL SUMMARY:Room temperature ionic liquids (RTILs) are salts with low melting points, often below room temperature. Today, the utility of RTILs in advanced electrochemical devices ranging from lithium ion batteries, to fuel cells, capacitors, solar cells and actuators is being explored. Nevertheless, only limited success has been achieved in practical applications. Because of their liquid state, the function RTILs in commercial devices might be improved if they were replaced by film-forming ionic liquid polymers. However, incorporation in a polymer system typically results in a substantial drop in ionic conductivity. This limitation can possibly be overcome in precision 2-D or 1-D nanomaterials. The present proposal outlines options for the synthesis and characterization of nanomaterials derived from ionic liquid polymers. Specific goals of the research are to synthesize and characterize new ionic liquid monomers; elucidate options for the preparation of nanocomposites; and, evaluate the morphology, thermal properties and electrochemical characteristics of these materials.Novel materials, that can be fabricated with the agency of the poly(ionic liquids), described in the present proposal, might be the key to commercial utility of an ionic liquid system in robust light-weight electronic devices ranging from Li ion batteries to photovotaics and fuel cells. Recent reports that imidazolium-based RTILs are excellent solvents for the dispersion of carbon nanotubes, and that the intrinsic structure and properties of the carbon nanotubes are retained after dispersion might be translated into practical device options by utilizing these new poly(ionic liquids). The research will be carried out at the Rochester Institute of Technology (RIT), a comprehensive university, offering terminal M.S. degrees in Chemistry and MS&E, and providing meaningful research experiences to graduate and undergraduate students alike. Three graduate students and two undergraduate students will be directly trained and mentored. In addition, the PI will mentor a summer student in the Syracuse/RIT, NSF Louis Stokes Alliance for Minority Participation - Upstate Alliance, and an ACS Project SEED student. A unique collaboration with Peggy Cebe (Tufts University), characterizing the crystal habit of polymer composites and providing research experiences to deaf and hard-of-hearing students will also be supported.

技术概述：室温离子液体（RTIL）是具有低熔点（通常低于室温）的盐，并且通常由与低刘易斯碱度的阴离子（BF 4-、PF 6-、CF 3SO 3-（CF 3SO 2）2 N-等）配对的季锍、鏻或铵（咪唑鎓、吡啶鎓、吡咯烷鎓）阳离子组成。今天，RTIL在先进的电化学设备中的效用正在探索，从锂离子电池到燃料电池、电容器、太阳能电池和致动器。由于离子液体的阴离子和阳离子组分的流动性，提出如果溶剂化膜或常规离子液体被其中离子的流动性受到约束的成膜离子液体聚合物取代，则此类装置的功能可能会得到改善。 然而，当离子液体中的阴离子和阳离子组分的流动性通过掺入聚合物体系中而降低时，离子电导率也受到显著影响。 这种限制可以通过减少纳米结构的精密嵌段共聚物和聚合物共混物中离子扩散的维数来调节。本提案概述了离子液体1，3-二烷基-4-和5-乙烯基咪唑鎓盐的合成和表征的选择，所述离子液体1，3-二烷基-4-和5-乙烯基咪唑鎓盐适合于容易的均聚或作为嵌段序列并入各种乙烯基和丙烯酸共聚物系统中。 此外，潜在的装置效用的聚合物共混物和嵌段共聚物系统包含这些咪唑聚合物是突出的。 本研究的具体目标是合成和表征形式上衍生自1-甲基-4-和5-乙烯基咪唑、2-烷基-1-甲基-4-和5-乙烯基咪唑和1-甲基-4-和5-乙烯基咪唑-2-丙磺酸盐的不对称非质子离子液体单体家族;阐明这些单体的均聚、无规共聚和嵌段共聚的选择;表征这些单体和聚合物的热和电化学性质;并且研究1，3-二烷基-4-乙烯基咪唑鎓盐与PVF 2的聚合物的共混物的热和电性质以及形态。非技术概述：室温离子液体（RTIL）是具有低熔点的盐，通常低于室温。今天，RTIL在先进的电化学设备中的效用，从锂离子电池，燃料电池，电容器，太阳能电池和致动器正在探索中。然而，在实际应用中只取得了有限的成功。由于其液态特性，用成膜离子液体聚合物替代RTIL可改善其在商业化器件中的功能。 然而，掺入聚合物体系通常导致离子电导率的显著下降。 这种限制可能在精确的2-D或1-D纳米材料中被克服。本提案概述了合成和表征源自离子液体聚合物的纳米材料的备选方案。 本研究的具体目标是合成和表征新的离子液体单体，阐明制备纳米复合材料的选择;并对这些材料的形貌、热性能和电化学性能进行了评价。（离子液体），在本提案中描述的，可能是离子液体系统在从锂离子电池到光伏电池和燃料电池的坚固的轻质电子设备中的商业实用性的关键。最近的报道表明，咪唑类RTIL是分散碳纳米管的优良溶剂，并且分散后碳纳米管的固有结构和性质得以保留，这可能会通过利用这些新的聚（离子液体）转化为实际的器件选择。这项研究将在罗切斯特理工学院（RIT）进行，这是一所综合性大学，提供终端硕士学位。在化学和MS E学位，并提供有意义的研究经验，研究生和本科生一样。三名研究生和两名本科生将直接接受培训和指导。此外，PI将指导锡拉丘兹/RIT，NSF路易斯斯托克斯少数民族参与联盟-北部联盟的暑期学生和ACS项目种子学生。与Peggy Cebe（塔夫茨大学）的独特合作，表征聚合物复合材料的晶体习性，并为聋人和听力障碍学生提供研究经验也将得到支持。