Neutron scattering studies of CO2-based gels

CO2 基凝胶的中子散射研究

• 批准号: EP/F020686/1
• 负责人: Julian Eastoe
• 金额: $ 15.13万
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF020686%2F1
• 关键词: Neutron; scattering; studies; CO2; based

The project will deliver complex fluids based on dense CO2, incorporating designed self-assembly structures for modifying viscosity and surface tension of CO2. In the medium term, these systems have potential to improve carbon capture technologies, as well as to enhance industrial processing applications of CO2 as a solvent. Small-angle neutron scattering (SANS) is the method of choice for determining shapes and sizes in these complex fluids systems, since it is sensitive to the appropriate colloidal and molecular length scales relevant for optimizing viscous properties of the bulk liquid. Therefore, access to world-class SANS facilities is essential for the programme. The approach is to generate CO2-philic surfactants that will form worm-like micelles in CO2. The strategy is to marry up recent breakthroughs in CO2 surfactant design [1], with the ability of certain organic additives and inorganic counterions to induce entangled system-spanning thread-like micelles [2]. Feasibility for this approach has been demonstrated by previous SANS experiments on LOQ at ISIS.The student will be trained in relevant chemical techniques for sample preparation and in SANS methodology at ISIS. The self-assembly structures will be investigated by High-Pressure SANS at ISIS (LOQ and SANS 2d on TSII) using existing, and soon to be commissioned, dedicated HP-SANS high-pressure cells. High-pressure viscosity properties will be studied by collaborators Professors Enick and Beckman of the University of Pittsburgh (Appendix 1). 1) Designed CO2-philes Stabilize Water-in-Carbon Dioxide MicroemulsionsJ. Eastoe, S. Gold, S.Rogers, P. Wyatt, D. C. Steytler, A.Gurgel, R.K. Heenan, X. Fan, E.J. Beckman and R.M. Enick, Angewandte Chemie, 2006, 45, 3675-3677.2) Viscoelastic worm-like micelles and their applicationsJ. Yang, Current Opinion in Colloid and Interface Science, 2002, 7, 276-281.

该项目将提供基于稠密二氧化碳的复杂流体，结合为改变二氧化碳的粘度和表面张力而设计的自组装结构。从中期来看，这些系统有潜力改进碳捕获技术，以及加强二氧化碳作为溶剂的工业加工应用。在这些复杂的流体系统中，小角中子散射(SANS)是确定形状和尺寸的首选方法，因为它对适当的胶体和分子长度尺度很敏感，与优化大块液体的粘性有关。因此，获得世界级的SANS设施对该计划至关重要。方法是生成亲二氧化碳的表面活性剂，这种表面活性剂将在二氧化碳中形成蠕虫状胶束。其策略是将二氧化碳表面活性剂设计的最新突破与某些有机添加剂和无机反离子诱导缠绕体系的线状胶束的能力结合在一起[1]。这种方法的可行性已经在ISIS以前的SANS LOQ实验中得到了证明。学生将在ISIS接受相关的样品制备化学技术和SANS方法方面的培训。自组装结构将由ISIS的高压SAN进行研究(LOQ和SANS 2d在TSII上)，使用现有的并即将投入使用的专用HP-SANS高压电池。高压粘度特性将由匹兹堡大学的合作者Enick和Beckman教授研究(附录1)。1)设计了亲二氧化碳的稳定二氧化碳中水的微乳液J。Eastoe，S.Gold，S.Rogers，P.Wyatt，D.C.Steytler，A.Gurel，R.K.Heenan，X.Fan，E.J.Beckman和R.M.Enick，Angewandte Chemie，2006，45,3675-3677.2)粘弹性蠕虫状胶束及其应用J.杨，《胶体与界面科学研究现状》，2002，7,276-281。

项目成果

Low fluorine content CO2-philic surfactants.

• DOI: 10.1021/la2021885
• 发表时间: 2011-08
• 期刊: Langmuir : the ACS journal of surfaces and colloids
• 作者: A. Mohamed;Masanobu Sagisaka;F. Guittard;Stephen Cummings;A. Paul;S. Rogers;R. Heenan;R. Dyer;J. Eastoe

Effect of surfactant headgroup on low-fluorine-content CO2-philic hybrid surfactants

• DOI: 10.1016/j.supflu.2016.04.018
• 发表时间: 2016-10
• 期刊: Journal of Supercritical Fluids
• 影响因子: 3.9
• 作者: A. Mohamed;Tretya Ardyani;S. A. Bakar;Masanobu Sagisaka;S. Ono;Tsuyoshi Narumi;M. Kubota;P. Brown-P.-Bro

Tri-chain hydrocarbon surfactants as designed micellar modifiers for supercritical CO2.

• DOI: 10.1002/anie.200901543
• 发表时间: 2009-06
• 期刊: Angewandte Chemie
• 作者: M. Hollamby;Kieran Trickett;A. Mohamed;Stephen Cummings;R. Tabor;O. Myakonkaya;Sarah Gold;S. Rogers;R. Heenan;J. Eastoe

Microemulsions as tunable nanomagnets

• DOI: 10.1039/c2sm26827b
• 发表时间: 2012-11
• 期刊: Soft Matter
• 影响因子: 3.4
• 作者: P. Brown;C. Butts;J. Eastoe;S. Glatzel;I. Grillo;Simon H. Hall;S. Rogers;Kieran Trickett

Economical and Efficient Hybrid Surfactant with Low Fluorine Content for the Stabilisation of Water-in-CO2 Microemulsions

• DOI: 10.1016/j.supflu.2015.01.012
• 发表时间: 2015-03
• 期刊: Journal of Supercritical Fluids
• 影响因子: 3.9
• 作者: A. Mohamed;Tretya Ardyani;Masanobu Sagisaka;Shinji Ono;Tsuyoshi Narumi;Makoto Kubota;Paul Brown