Spontaneous multilayer formation at interfaces from self-assembly of mixed surfactant and polymer/surfactant mixtures

混合表面活性剂和聚合物/表面活性剂混合物的自组装在界面处自发形成多层

• 批准号: EP/G065705/1
• 负责人: Jeffery Penfold
• 金额: $ 49.26万
• 依托单位: Science and Technology Facilities Council
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG065705%2F1
• 关键词: Spontaneous; multilayer; formation; interfaces; self

Until relatively recently the formation of multilayer structures at surfaces and interfaces from self-assembling systems was rarely observed. This was in part due to a lack of suitable experimental tools to probe such surface structures. They are being increasingly recognised as an important structural signature associated with a wide range of technological applications and biological functions. There is now some preliminary experimental evidence that an increasing range of different systems can be manipulated to form or will spontaneously form multilayer structures at interfaces; including lipids, surfactants, mixed surfactants, polyelectrolytes, and polyelectrolyte / surfactant mixtures. Such structures have important implications in many aspects of lubrication, such as in fabric and hair conditioners, and in bio-lubrication in general. Although the criteria for the formation of lamellar type structures in bulk solution are well-established, the major factors controlling their formation at surfaces and interfaces are not understood and have not been extensively investigated. We propose here to use primarily neutron scattering techniques (specular and off-specular reflectivity, in combination with H/D isotopic substitution) to investigate the nature of the multilayer structures at the air-solution, solid-liquid and liquid-liquid interfaces, in surfactants and surfactant mixtures and in polymer / surfactant mixtures, in order to establish the key factors that determine multilayer formation, and to provide a theoretical link to the associated surface tension and wetting properties, and the kinetics of formation / dissolution. It is expected that this research programme will provide new understandings relating to biological function and to developments of new products associated with soft lubrication and efficient controlled delivery of benefit agents to interfaces.

直到最近，还很少观察到自组装系统在表面和界面形成多层结构。这在一定程度上是因为缺乏合适的实验工具来探测这种表面结构。它们越来越多地被认为是与广泛的技术应用和生物功能相关的重要结构特征。现在有一些初步的实验证据表明，越来越多的不同体系可以被操纵来在界面上形成或将自发地形成多层结构，包括脂类、表面活性剂、混合表面活性剂、聚电解质和聚电解质/表面活性剂混合物。这种结构在润滑的许多方面都有重要的意义，例如在织物和头发调理剂中，以及一般的生物润滑中。尽管块体溶液中形成片层结构的标准已经确立，但控制其在表面和界面形成的主要因素尚不清楚，也没有得到广泛的研究。我们建议主要使用中子散射技术(镜面和镜外反射率，结合H/D同位素替代)来研究空气-溶液、固-液和液-液界面、表面活性剂和表面活性剂混合物以及聚合物/表面活性剂混合物中多层结构的性质，以确定决定多层形成的关键因素，并提供与相关的表面张力和润湿性质以及形成/溶解动力学之间的理论联系。预计这一研究方案将提供有关生物功能的新理解，以及与软润滑和有效受控地将有益物质输送到界面相关的新产品的开发。

项目成果

Solution pH and oligoamine molecular weight dependence of the transition from monolayer to multilayer adsorption at the air-water interface from sodium dodecyl sulfate/oligoamine mixtures.

十二烷基硫酸钠/低聚胺混合物在空气-水界面处从单层吸附到多层吸附转变的溶液 pH 值和低聚胺分子量依赖性。

• DOI: 10.1021/la400929z
• 发表时间: 2013
• 期刊: the ACS journal of surfaces and colloids
• 作者: Halacheva SS

Effect of polymer molecular weight and solution pH on the surface properties of sodium dodecylsulfate-poly(ethyleneimine) mixtures.

• DOI: 10.1021/la302444b
• 发表时间: 2012-10
• 期刊: Langmuir : the ACS journal of surfaces and colloids
• 作者: S. Halacheva;J. Penfold;R. Thomas;J. Webster

Effect of architecture on the formation of surface multilayer structures at the air-solution interface from mixtures of surfactant with small poly(ethyleneimine)s.

结构对表面活性剂与小聚（乙烯亚胺）混合物在空气-溶液界面形成表面多层结构的影响。

• DOI: 10.1021/la3003977
• 发表时间: 2012
• 期刊: the ACS journal of surfaces and colloids
• 作者: Halacheva SS

Adsorption of the linear poly(ethyleneimine) precursor poly(2-ethyl-2-oxazoline) and sodium dodecyl sulfate mixtures at the air-water interface: the impact of modification of the poly(ethyleneimine) functionality.

线性聚（乙烯亚胺）前体聚（2-乙基-2-恶唑啉）和十二烷基硫酸钠混合物在空气-水界面的吸附：聚（乙烯亚胺）官能团改性的影响。

• DOI: 10.1021/la303926c
• 发表时间: 2012
• 期刊: the ACS journal of surfaces and colloids
• 作者: Halacheva SS

Ion specific effects in trivalent counterion induced surface and solution self-assembly of the anionic surfactant sodium polyethylene glycol monododecyl ether sulfate.

• DOI: 10.1021/la500937g
• 发表时间: 2014-04
• 期刊: Langmuir : the ACS journal of surfaces and colloids
• 作者: Hui Xu;J. Penfold;R. Thomas;J. Petkov;I. Tucker;J. Webster;I. Grillo;Alvin V. Terry