CAREER: Expanding the Science of Complex Fluids to the Solid State

职业：将复杂流体科学扩展到固态

• 批准号: 0744650
• 负责人: Carlos Co
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 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: 2008-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0744650&HistoricalAwards=false
• 关键词: CAREER; Expanding; Science; Complex; Fluids

CBET- 0744650Carlos C. CoU. Cincinnati Complex fluid mixtures of surfactants with water and oil self-assemble to form a rich variety of nanostructures that have found important applications in many areas of chemical and materials engineering. Over the past three years, the PI's laboratory has pioneered investigations of a completely new class of anhydrous complex fluids, comprising of surfactant, oil, and sugar that form solid complex glasses. The robust nanostructure of these sugar-based complex glasses, and the ease with which they can be dissolved afterwards in water, make them eminently useful as templates for the preparation of rod-like, sheet-like, and bicontinuous nanomaterials with wide ranging practical applications. The thermodynamically driven spontaneous mixing of hydrophobic compounds in complex glasses also opens new avenues for direct encapsulation of oils and preservation of pharmaceuticals and proteins. Results from the proposed work to understand glass formation in sugar-based complex glasses will establish the foundation for a broader career-defining research program in glass formation from non-aqueous complex fluids including for example, molten salts and low melting point metal alloys that combine magnetic, electronic, and catalytic properties with the rich nanostructures of complex fluids. New science and exciting applications await discovery at the intersection of glasses with complex fluids. This CAREER proposal seeks support that will catalyze efforts towards establishing the fundamental principles underlying glass formation in complex fluids. An array of preliminary results demonstrates glass formation in complex fluids and the feasibility of the proposed studies. These include: (1) phase behavior characterization; (2) modulated differential scanning calorimetry measurements of the glass transition; (3) electron microscopy; (4) small angle scattering measurements of microstructural length scales; (5) magnetic resonance imaging and self-diffusion measurements of microstructural topology/connectivity; and (6) rheological characterization of the complex glasses in their molten state. To demonstrate the practical utility of these complex glasses, the PI presents preliminary results for two specific applications: (1) environmentally friendly, solvent-free preparation of polydivinylbenzene membranes, and (2) high-efficiency, spontaneous encapsulation of 50 vol% limonene, the principal component of orange oil, in an edible solid microemulsion glass. Broader Impact: The educational objective proposed here further integrates the PI's research expertise to lead a curriculum reform effort that elevates product design, rooted at the molecular-level, to the same level as the archetypal Chemical Engineering capstone course in plant design. To bring together concepts taught in a sequence of new pilot courses, the PI will develop a common case study on laundry detergents, which ties together knowledge of colloids and interfacial phenomena, polymers, inorganic chemistry, enzyme catalysis, encapsulation, powder processing, and broader ecological and intellectual property considerations. Other academic institutions will access lecture and laboratory modules through the WWW and the PI will make a technically simplified available to K12 students and teachers. The PI will assess the effectiveness of this curriculum reform effort, which will be implemented in stages on two parallel undergraduate sections, through a mandatory annual cooperative education cycle. Student, faculty, and industrial evaluations will be used to fine-tune the course content and test the commonly held belief that innovative product design has become a necessary skill for domestic chemical engineers as traditional engineering functions and production are transferred overseas.

CBET- 0744650CARLOS C.COU。表面活性剂与水和石油自组装的辛辛那提复合液混合物形成了各种各样的纳米结构，这些纳米结构在许多化学和材料工程领域都发现了重要的应用。在过去的三年中，PI的实验室率先研究了一类全新的无水复合液，包括表面活性剂，油和糖，形成固体复杂玻璃。这些基于糖的复合玻璃的稳健纳米结构以及之后可以溶解在水中的易于性，使其可作为模板非常有用，以制备棒状，类似薄板和双连续纳米材料，并具有宽大的范围。复杂玻璃中疏水化合物的热力学驱动的自发混合也为直接封装油和保存药物和蛋白质提供了新的途径。拟议的工作以了解基于糖的复杂玻璃中玻璃形成的作品的结果将为从非水的复杂液体制定更广泛的职业定义研究计划，包括熔融盐和低熔点金属合金，结合了磁性，电子和催化性能与富含复合液的纳米结构。新科学和令人兴奋的应用在玻璃与复杂的液体的交点上发现。这项职业建议寻求支持，将促进建立复杂液体中玻璃形成基本原则的努力。一系列初步结果表明，复杂的流体中的玻璃形成以及拟议的研究的可行性。这些包括：（1）相行为表征； （2）调制玻璃转变的差量扫描量热法测量； （3）电子显微镜； （4）微结构长度尺度的小角度散射测量； （5）微结构拓扑/连通性的磁共振成像和自扩散测量； （6）复杂玻璃在其熔融状态下的流变学表征。为了证明这些复杂玻璃的实际实用性，PI为两种特定应用提供了初步结果：（1）多二甲基苯基膜的环境友好，无溶剂的无溶剂制备，以及（2）高效，高效，自发封装50 vol％limonene，limonene的主要成分，是橙色油，是橙色的玻璃，磨好的Microemuls microemuls microemuls microemuls microemuls microemuls microemuls microemuls microemuls microemuls microemume米。 更广泛的影响：这里提出的教育目标进一步整合了PI的研究专业知识，以领导课程改革工作，该课程将植根于分子级的产品设计提升到与植物设计中的原型化学工程盖水平相同的水平。为了结合一系列新的试点课程的概念，PI将开发一项关于洗衣粉的常见案例研究，该研究将胶体和界面现象，聚合物，无机化学，酶催化，封装，粉末加工，更广泛的生态和知识特性考虑的知识联系在一起。其他学术机构将通过www访问讲座和实验室模块，PI将为K12学生和老师提供技术简化。 PI将通过强制性的年度合作教育周期来评估这项课程改革工作的有效性，该课程改革工作将在两个平行的本科部分分阶段实施。学生，教职员工和工业评估将用于微调课程内容，并测试通常认为创新的产品设计已成为国内化学工程师的必要技能，因为传统的工程功能和生产已转移到海外。