CAREER: Towards A Paradigm of Sustainable Liquid Repellent Surfaces

职业生涯：迈向可持续液体排斥表面的范例

• 批准号: 1751628
• 负责人: Arun Kumar Kota
• 金额: $ 50万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-04-01 至 2019-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1751628&HistoricalAwards=false
• 关键词: CAREER; Towards; Paradigm; Sustainable; Liquid

This Faculty Early Career Development Program (CAREER) award supports research that will contribute new fundamental knowledge in the field of surface science, related to liquid-repellent surfaces (often called non-stick coatings). Typically, liquid-repellent surfaces are made with long chain fluorocarbon materials. However, long chain fluorocarbon materials are rapidly being phased out because of the growing concerns regarding their negative environmental and biological impacts. This research promotes national health by developing alternative surface treatments to the currently used toxic bio-accumulating materials. New hydro- and omniphobic materials are increasingly in demand for defense and commercial applications in textiles, surface coatings in harsh or "dirty" environments, among others. The work advances the science of surface repellents by providing the basic knowledge needed to design novel liquid-repellent surfaces with the more benign short chain fluorocarbon materials and with performance (i.e., degree of liquid repellency) equivalent to the long chain fluorocarbon materials. Such innovative liquid-repellent surfaces have the potential to drastically alter the non-stick coatings technology landscape in civilian, industrial and defense sectors. Therefore, the results and insights from this research will be significantly beneficial to the U.S. economy and society. The education activities are integrated with this research through the generation of STEM education kits and do-it-yourself (DIY) videos on "Fun with Surface" to be used in K-12 science classes in conjunction with teacher training workshops.Liquid-repellent surfaces consisting of long chain fluorocarbons (i.e., linear molecules with 8 or more fully fluorinated carbons) decompose into perfluorooctanoic acid, which is bio-accumulative and is considered an emerging contaminant. So, it is essential to develop alternative sustainable materials (e.g., short chain fluorocarbons) that can be as liquid-repellent as long chain fluorocarbons. The research is based on the hypothesis that short chain fluorocarbons with high surface crystallinity and re-entrant morphology will offer liquid-repellency equivalent to long chain fluorocarbons. To test this hypothesis, the research team will systematically investigate the influence of molecular architecture of fluorocarbon surface ligands and surface modification reaction coordinates on surface crystallinity and morphology. The resulting liquid-repellency will be investigated experimentally and compared with theoretical predictions. Overall, this research will provide a thorough understanding of molecular architecture-processing-structure-property relationships involved in design of liquid-repellent surfaces and pave the way to a paradigm of sustainable liquid-repellent surfaces.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该学院早期职业发展计划（CAREER）奖支持将在表面科学领域贡献新的基础知识的研究，与液体排斥表面（通常称为不粘涂层）有关。通常，液体排斥表面由长链氟碳材料制成。然而，长链碳氟化合物材料正迅速被淘汰，因为人们越来越关注它们对环境和生物的负面影响。这项研究通过开发替代目前使用的有毒生物积累材料的表面处理来促进国民健康。新型疏水性和全疏性材料在纺织品、苛刻或“肮脏”环境中的表面涂层等国防和商业应用中的需求越来越大。这项工作通过提供设计具有更良性的短链氟碳材料和性能（即，液体排斥程度）等同于长链氟碳材料。这种创新的拒液表面有可能彻底改变民用、工业和国防领域的不粘涂料技术格局。因此，这项研究的结果和见解将对美国经济和社会产生重大影响。教育活动通过制作STEM教育工具包和“Fun with Surface”的DIY视频与这项研究相结合，用于K-12科学课程和教师培训研讨会。具有8个或更多完全氟化碳的线性分子）分解成全氟辛酸，全氟辛酸具有生物累积性，被认为是一种新出现的污染物。因此，开发替代性可持续材料至关重要（例如，短链碳氟化合物），其可以与长链碳氟化合物一样具有拒液性。该研究是基于这样的假设，即具有高表面结晶度和凹入形态的短链碳氟化合物将提供与长链碳氟化合物相当的拒液性。为了验证这一假设，研究小组将系统地研究氟碳表面配体的分子结构和表面改性反应坐标对表面结晶度和形态的影响。由此产生的液体排斥性将进行实验研究，并与理论预测进行比较。总体而言，这项研究将提供一个全面的了解分子结构，加工，结构，性质的关系，涉及设计的液体排斥表面，并铺平了道路，以一个范例的可持续液体排斥surface.This奖项反映了NSF的法定使命，并已被认为是值得的支持，通过评估使用基金会的知识价值和更广泛的影响审查标准。