Water-Borne Self-Assembled Monolayers and Films

水性自组装单层膜和薄膜

• 批准号: 9983966
• 负责人: Gannon Jennings
• 金额: $ 10万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983966&HistoricalAwards=false
• 关键词: Water; Borne; Self; Assembled; Monolayers

ABSTRACTCTS-9983966Jennings - Vanderbilt U.This proposal seeks to develop new methodologies for forming self-assembled monolayers (SAMS) that will expand the uses and applications of these molecular films. The approach utilizes the assembly of alkanethiolate SAMs onto metal supports from aqueous solutions instead of the traditional organic solvents. The proposed work exploits the molecular design of water-soluble adsorbates and the control of aqueous processing variables including pH, electrochemically benign aqueous solvents. The information of the SAMs can be monitored in situ by electrochemical techniques such as interfacial capacitance measurements. The proposed work will also investigate the feasibility of using water-borne SAMs in applications. Through the hydrophobic effect, the low-energy surfaces formed from aqueous solvents will serve templates for the formation of surfactant films or layered, self assembling systems that can be removed from the substrate and used as ultrathin skins for membrane separations. The proposed research also provides new opportunities for applying SAMs to alleviate engineering problems such as corrosion. Water-borne SAMs will be used as aqueous-phase corrosion inhibitors to provide and maintain a ultrathin barrier layer that impedes the transport of aqueous species to an underlying metal such as copper or iron in continuous contact with an aqueous phase.The advantages of forming self-assembled monolayers in aqueous solutions include (1) environmentally clean processing of films and coating, (2) the ability to utilize hydrophobic interactions to engineer novel self-assembled systems (3) the use of added surfactant, electrochemical potential, and pH to gain an unprecedented control over the molecular-level properties of SAMs, and (4) the development of new technological applications for SAMs in aqueous systems. The study of SAM formation in aqueous solution will likely spark the fusion of knowledge from two separate areas of colloid and surface chemistry involving research on micellar systems and that on self-assembled monolayers. This fusion should result in a dramatic increase in the generation of novel self-assembled systems with unique properties, superior stabilities, and attractive potential for applications.

Jennings-范德比尔特U.该提议寻求开发用于形成自组装单分子层（SAMS）的新方法，这将扩展这些分子膜的用途和应用。 该方法利用烷基硫醇盐自组装到金属载体上的水溶液，而不是传统的有机溶剂的组装。 拟议的工作利用水溶性吸附物的分子设计和水处理变量的控制，包括pH值，电化学良性的水溶剂。 自组装膜的信息可以通过电化学技术如界面电容测量原位监测。 拟议的工作还将调查在应用中使用水性自组装膜的可行性。 通过疏水效应，由水性溶剂形成的低能量表面将用作表面活性剂膜或分层自组装系统的形成的模板，所述表面活性剂膜或分层自组装系统可以从基底移除并用作膜分离的表皮。 拟议的研究还提供了新的机会，应用自组装膜，以减轻工程问题，如腐蚀。 水性自组装膜将用作水相缓蚀剂，以提供和保持一个可渗透的阻挡层，该阻挡层阻止水相物质向与水相连续接触的下层金属如铜或铁的传输。在水溶液中形成自组装单分子层的优点包括（1）膜和涂层的环境清洁处理，（2）利用疏水相互作用来设计新的自组装系统的能力（3）使用添加的表面活性剂、电化学电势和pH来获得对自组装膜的分子水平性质的前所未有的控制，以及（4）开发自组装膜在水性系统中的新技术应用。 SAM在水溶液中形成的研究可能会引发知识的融合，从两个独立的领域的胶体和表面化学，涉及胶束系统的研究和自组装单分子膜。 这种融合将导致具有独特性质、上级稳定性和有吸引力的应用潜力的新型自组装系统的产生急剧增加。