Imperial College London

ProfessorGeoffreyMaitland

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Energy Engineering
 
 
 
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Contact

 

+44 (0)20 7594 1830g.maitland Website

 
 
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Assistant

 

Mrs Sarah Payne +44 (0)20 7594 5567

 
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Location

 

401ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

232 results found

Croce V, Cosgrove T, Dreiss CA, 2004, Mixed spherical and wormlike micelles: A contrast-matching study by small-angle neutron scattering, LANGMUIR, Vol: 20, Pages: 9978-9982, ISSN: 0743-7463

Journal article

Croce V, Cosgrove T, Dreiss CA, Maitland G, Hughes Tet al., 2004, Mixed spherical and wormlike micelles: A contrast-matching study by small-angle neutron scattering, Langmuir, Vol: 20, Pages: 9978-9982, ISSN: 0743-7463

Small-angle neutron scattering studies were used to investigate the effect of adding an alcohol ethoxylate nonionic surfactant (d-C12E 20) to aqueous solutions of a cationic surfactant, erucyl bis(hydroxyethyl) methylammonium chloride (EHAC), with and without salt (KCl). The systematic use of contrast-matching, by alternately highlighting or hiding one of the surfactants, confirms that mixed micelles are formed. In salt-free solutions, mixed spherical micelles are formed and a core-shell model combined with a Hayter-Penfold potential was used to describe the data. The core radius is dominated by the EHAC tails and the outer radius determined by the ethoxylate headgroups of the nonionic surfactant. Addition of KCl promotes micellar growth; however, results of varying the solvent contrast revealed that when the nonionic surfactant is incorporated into the wormlike structure micellar breaking is promoted. Thus, mixed wormlike micelles with shorter contour lengths compared to the pure EHAC worms are formed.

Journal article

Couillet I, Hughes T, Maitland G, Candau F, Candau SJet al., 2004, Growth and scission energy of wormlike micelles formed by a cationic surfactant with long unsaturated tails, LANGMUIR, Vol: 20, Pages: 9541-9550, ISSN: 0743-7463

Journal article

Croce V, Cosgrove T, Dreiss CA, Maitland G, Hughes T, Karlsson Get al., 2004, Impacting the length of wormlike micelles using mixed surfactant systems, LANGMUIR, Vol: 20, Pages: 7984-7990, ISSN: 0743-7463

Journal article

Croce V, Cosgrove T, Maitland G, Maitland G, Hughes T, Karlsson Get al., 2004, Rheology, cryogenic transmission electron spectroscopy, and small-angle neutron scattering of highly viscoelastic wormlike micellar solutions (vol 19, pg 8536, 2003), LANGMUIR, Vol: 20, Pages: 277-277, ISSN: 0743-7463

Journal article

Maitland G, Sawdon C, Tehrani MA, 2004, Electrically conductive non-aqueous wellbore fluids, US6787505

Patent

Anderson VJ, Tardy, PMJC, Crawshaw JP, Maitland Get al., 2004, Extensional flow of wormlike micellar fluids (Article no.FE07), Seoul, Proceedings of XIVth Interantional Congress on Rheology, Seoul, Korea, Publisher: Korean Society of Rheology

Conference paper

Croce V, Cosgrove T, Maitland G, Hughes T, Karlsson Get al., 2003, Rheology, cryogenic transmission electron spectroscopy, and small-angle neutron scattering of highly viscoelastic wormlike micellar solutions, LANGMUIR, Vol: 19, Pages: 8536-8541, ISSN: 0743-7463

Journal article

Patel BH, Paricaud P, Galindo A, Maitland GCet al., 2003, Prediction of the salting-out effect of strong electrolytes on water plus alkane solutions, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 42, Pages: 3809-3823, ISSN: 0888-5885

Journal article

Breen C, Clegg F, Maitland G, 2003, Treatment fluids and methods for consolidating substrates without simultaneous substantial loss of permeability, GB2375121

Patent

Maitland G, 2002, Overview, JOURNAL OF PETROLEUM TECHNOLOGY, Vol: 54, Pages: 50-50, ISSN: 0149-2136

Journal article

Boek ES, Jusufi A, Lowen H, Maitland GCet al., 2002, Molecular design of responsive fluids: molecular dynamics studies of viscoelastic surfactant solutions, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 14, Pages: 9413-9430, ISSN: 0953-8984

Journal article

Deng CS, Breen C, Yarwood J, Habesch S, Phipps J, Craster B, Maitland Get al., 2002, Ageing of oilfield cement at high humidity: a combined FEG-ESEM and Raman microscopic investigation, Journal of Materials Chemistry, Vol: 12, Pages: 3105-3112, ISSN: 0959-9428

Journal article

Maitland G, 2001, Overview, JOURNAL OF PETROLEUM TECHNOLOGY, Vol: 53, Pages: 38-38, ISSN: 0149-2136

Journal article

Georgiadis A, 2001, Interfacial Tension of Aqueous and Hydrocarbon Systems in the Presence of Carbon Dioxide at Elevated Pressures and Temperatures

The interfacial tension of partially miscible phases, containing H2O andhydrocarbons in the presence of CO2 at elevated pressures and temperatures,has been studied within the context of producing cleaner fossil fuelsby simultaneously tackling greenhouse gas emissions. This is a most relevantproperty inuencing the multiphase reservoir ows associated withenhanced oil recovery (EOR), and carbon capture and storage (CCS). Themain core of the thesis focuses on the experimental investigation of thedependence of interfacial tension on pressure and temperature, for variousmixtures of pure substances relevant to oil- eld conditions and uids. Forthis purpose, a high pressure high temperature (HPHT) apparatus, comprisinga view cell, high pressure capillary tubing connections, and appropriateuid delivery syringe pumps, was used over an operating temperaturerange of (298 to 473)K and at pressures up to 60MPa. The apparatusimplemented the pendant drop method, well suited for the accuratedetermination of uid/liquid interfacial tensions at elevated pressures andtemperatures, linked to a computer-aided drop shape analysis (DSA) system.Measurements were made over a wide range of conditions for the twophasesystems (H2O+CO2), (n-decane+CO2), (n-dodecane+CO2), (n-hexadecane+CO2), (H2O+n-decane) and (H2O+[n-decane+CO2]). Thedi erent isotherms recorded for each system demonstrated systematic trendswith increasing pressure, while the decrease of interfacial tension with temperatureobserved at ambient pressures was usually reversed at elevatedpressures. For the (H2O+CO2) system in particular, the pressure dependenceof interfacial tension demonstrated abrupt changes at certain conditions,associated with the onset of the liquid or supercritical states, abovewhich the interfacial tension was less sensitive to changes in both pressureand temperature. This was not the case for the (n-alkane+CO2) systems,where the interfacial tension reduced with increasing pressure, vanishing asthe two phases be

Thesis dissertation

Pafitis DG, Maitland GCD, Davies SN, 2001, Thixotropic materials suitable for oilwell applications, US6279655

Patent

Briscoe BJ, Cann PM, Delfino A, Maitland GCet al., 2001, Lubrication of water-based clay suspensions, Holland, Symposium on Tribology research: from model experiment to industrial problem, Lyon, France, September 2000, Publisher: Elsevier, Pages: 331-340

Conference paper

Tehrani MA, Davies SNM, Maitland G, 2001, Setting composition for well operations, GB2317896;US6177483

Patent

Maitland GC, 2000, Oil and gas production, CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Vol: 5, Pages: 301-311, ISSN: 1359-0294

Journal article

Maitland GC, 2000, The colloid and interface science of oil and gas production, Current Opinion in Colloid and Interface Science, Vol: 5, Pages: 301-311

Journal article

Maitland GC, Nwammuo OP, 1999, Electro-optic birefringence and scattering of concentrated solutions of ethylcellulose, ANGEWANDTE MAKROMOLEKULARE CHEMIE, Vol: 268, Pages: 1-12, ISSN: 0003-3146

Journal article

Nwammuo OP, Maitland GC, 1999, Electro-optic studies of polymers of varying flexibility in solution, Angewandte Makromolekulare Chemie, Vol: 272, Pages: 28-39

Journal article

Smith RG, Maitland GC, 1998, The road ahead to real-time oil and gas reservoir management, Transactions of the Institution of Chemical Engineers, Vol: 76A, Pages: 539-552

Journal article

Shewring N I, Jones, TGJM, 1995, Fourier transform infrared spectroscopic techniques to investigate surface hydration processes on bentonite, Journal of Colloid and Interface Science, Vol: 176, Pages: 308-317

Journal article

Fordham EJ, Hall C, Roberts TPL, Hall LD, Maitland GCet al., 1994, Imaging voids in cement slurries, Application of NMR Spectroscopy to Cement Science, Editors: Colombet, Grimmer, London, Publisher: Gordon and Breach, Pages: 337-352

Book chapter

SHIH WH, SHIH WY, KIM SI, AKSAY IAet al., 1993, EQUILIBRIUM-STATE DENSITY PROFILES OF CENTRIFUGED CAKES OF FLOCCULATED SUSPENSIONS, SYMP ON FLOW AND MICROSTRUCTURE OF DENSE SUSPENSIONS, Publisher: MATERIALS RESEARCH SOC, Pages: 251-256, ISSN: 0272-9172

Conference paper

KIMINTA D, COSTELLO B, LENON S, LUCKHAM PFet al., 1993, CHARACTERIZATION OF MONODISPERSE AQUEOUS LATEX DISPERSIONS PREPARED WITH N-ISOPROPYLACRYLAMIDE, SYMP ON FLOW AND MICROSTRUCTURE OF DENSE SUSPENSIONS, Publisher: MATERIALS RESEARCH SOC, Pages: 13-18, ISSN: 0272-9172

Conference paper

COSTELLO BA, LUCKHAM PF, 1993, VISCOELASTIC PROPERTIES OF CONFINED POLYMER LAYERS, SYMP ON FLOW AND MICROSTRUCTURE OF DENSE SUSPENSIONS, Publisher: MATERIALS RESEARCH SOC, Pages: 7-11, ISSN: 0272-9172

Conference paper

HU Y, FRADEN S, GLASS JL, WENNER LEet al., 1993, INTERACTION BETWEEN COLLOIDAL PARTICLES IN AC ELECTRIC-FIELDS IN THE RELAXATION REGION OF DOUBLE-LAYERS, SYMP ON FLOW AND MICROSTRUCTURE OF DENSE SUSPENSIONS, Publisher: MATERIALS RESEARCH SOC, Pages: 25-30, ISSN: 0272-9172

Conference paper

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