Interfacial and Turbulent Mass Transfer of Monomers into Latex Particles Stabilized with Mixed Surfactants and Water-Soluble Polymer

单体通过界面和湍流传质转化为混合表面活性剂和水溶性聚合物稳定的乳胶颗粒

• 批准号: 8704383
• 负责人: Andrew Klein
• 金额: $ 8.9万
• 依托单位: Lehigh University
• 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: 1987-07-01 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8704383&HistoricalAwards=false
• 关键词: Interfacial; Turbulent; Mass; Transfer; Monomers

Research Summary: Mass transport of small organic molecules through well characterized interfacial films, adsorbed on latex particles, will be studied. Interfacial films of the "condensed" type, those with strong interactions between adsorbed molecules such as the sodium hexadecyl sulfate/sodium hexadecyl alcohol mixed surfactants or sodium lauryl sulfate at high ionic strength, will be used. The effect of agitation on the mass transport will be also studied. The proposed work is aimed toward the understanding of mass transport through tightly packed molecules in the interface. Most studies have been on liquid drops, where the transport resistance was due to the reduced liquid recirculation near the surface of the drop. In this work the substrate is a polymer particle and recirculation effects are absent. The mass transport resistance must than depend on the barrier properties of the interfacial film. Technical Impact: In commercial latex manufacture, colloid stabilization is often based on mixed stabilizers, ionic/nonionic surfactant mixtures, which often lead to interfacial layers of tightly packed molecules. Information about the mass transport through such a phase in the turbulent agitation regime is needed for the effective kinetic modeling of commercial reactions. Such information is currently not available. This work will yield some of this missing information.

研究概要：有机小分子的质量传递 通过良好表征的界面膜，吸附在胶乳上 粒子将被研究。 “凝聚态”界面膜 类型，吸附分子之间具有强相互作用的那些 例如十六烷基硫酸钠/十六烷基醇钠 混合表面活性剂或高离子强度的十二烷基硫酸钠， 将用于 搅拌对质量输送的影响将 也要研究。 这项工作的目的是为了理解质量 通过界面中紧密堆积的分子进行传输。 最 已经对液滴进行了研究，其中输送阻力 是由于减少液体回流附近的表面， 下降 在这项工作中，基底是聚合物颗粒， 不存在再循环效应。 质量传输阻力必须 而不是取决于界面膜的阻挡性能。 技术影响：在商业乳胶生产中，胶体 稳定化通常基于混合稳定剂， 离子/非离子表面活性剂混合物，其通常导致 紧密堆积的分子的界面层。 信息 在湍流中通过这样一个阶段的质量传输 有效的动力学建模需要搅拌制度 商业反应。 这些信息目前还没有 available. 这项工作将产生一些失踪的 信息.