PRE Scientist Supplement: Molecular Interactions in Binary Mixtures of Surfactants

PRE 科学家增刊：表面活性剂二元混合物中的分子相互作用

• 批准号: 8706859
• 负责人: Milton Rosen
• 金额: $ 14.8万
• 依托单位: CUNY Brooklyn College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1990-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8706859&HistoricalAwards=false
• 关键词: PRE; Scientist; Supplement; Molecular; Interactions

Research Summary: This is an investigation of conditions under which mixtures of two surfactants exhibit synergism, i.e., show properties that are better than those of the individual surfactants by themselves. There are three foci of the research: (1) Synergism is dynamic surface tension. Here the principal investigator is investigating the rate at which surface tensions are reduced. (2) Negative synergism. This is a novel phenomenon recently observed where the mixture demonstrates an interfacial property to a smaller extent than the individual surfactants by themselves under similar conditions. (3) New equations for calculating the molecular interaction parameters that are the basis for synergism. Synergism is investigated by measuring various interfacial properties (surface and interfacial tension, contact angle, foaming) of the individual surfactants and their mixtures. Dynamic surface tension will be investigated with their new apparatus. Significance. Surfactants, which are used in a vast number of industrial processes and consumer items, are generally mixtures containing at least two surface-active components. This research will provide guidelines for the selection of surfactant pairs that can optimize their performance in those products and processes. From the relevant properties of the individual surfactants by themselves and the value of an easily-measured interaction parameter, this treatment allows one to predict: (1) whether a synergistic interaction will occur when two surfactants are mixed and, if so, (2) the ratio of the two that will show maximum synergism, and (3) the properties of the system at that point. This means that we now have a powerful, new tool for improving performance in a multitude of industrial processes and products.

研究摘要：这是一项调查， 该两种表面活性剂的混合物表现出协同作用，即，显示 比个人更好的特性 表面活性剂本身。 研究有三个重点： (1)协同作用是动态表面张力。 这里的校长 研究人员正在研究表面张力的速率， 降低 (2)负协同作用。 这是最近的一个新现象 在混合物显示出界面性质的情况下观察到 比单独的表面活性剂本身更小的程度 在类似的条件下。 (3)用于计算 分子相互作用参数是协同作用的基础。 通过测量各种界面性质来研究协同作用 （表面和界面张力，接触角，发泡） 单独的表面活性剂及其混合物。 动态表面张力 将用他们的新仪器进行研究 意义 表面活性剂，用于大量的 工业过程和消费品，通常是混合物 含有至少两种表面活性组分。 本研究 将为选择表面活性剂对提供指导， 优化他们在这些产品和工艺中的性能。从 单个表面活性剂本身的相关性质， 一个容易测量的相互作用参数的值，这种治疗 可以预测：（1）协同作用是否会 当两种表面活性剂混合时发生，如果是这样，（2）比例 两个将显示最大的协同作用，和（3） 系统在这一点上的属性。 这意味着我们现在 有一个强大的，新的工具来提高性能， 众多的工业生产和产品。