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The HLD-NAC Model for Extended Surfactant Microemulsions

  • Original Article
  • Published:
Journal of Surfactants and Detergents

Abstract

It has been confirmed that the structure of the alkyl group of an extended surfactant plays an important role in defining its interfacial properties. Alkyl groups containing a higher degree of β-branching (C2-branching) produce microemulsions with a larger characteristic length (ξ, the extent of solubilization in middle phases). This effect is explained on the basis that β-branching increases the hydrophobicity of the surfactant and decreases the optimal salinity of the microemulsion. Higher salinities produce a dehydration of the surfactant groups that lead to shorter extent of the interactions with the oil and the water. Larger characteristic lengths are desirable if the objective of the formulation is obtaining greater solubilization of oil and water, and lower interfacial tensions. Large characteristic lengths are, in most cases, associated with high interfacial rigidities, which are undesirable if rapid coalescence is required. However, mixtures of branched and linear extended surfactants produce large characteristic lengths and lower interfacial rigidities. The HLD-NAC model is able to reflect the experimental trends in solubilization of oil and water. The differences between the predictions of the model for the solubilization of oil and water in Type I and II formulations, respectively, highlight the complexities in the conformation of extended surfactants, particularly their PO groups, at oil–water interfaces and the need for advanced scattering techniques to evaluate these conformations.

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References

  1. Miñana-Pérez M, Graciaa G, Lachaise J, Salager J-L (1995) Solubilization of polar oils with extended surfactants. Colloid Surf A 100:217–224

    Article  Google Scholar 

  2. Phan TT, Harwell JH, Sabatini DA (2009) Effects of triglyceride molecular structure on optimum formulation of surfactant-oil-water systems. J Surf Deterg 13:189–194

    Article  Google Scholar 

  3. Wu Y, Iglauer S, Shuler P, Tang Y, Goddard WA III (2010) Branched alkyl alcohol propoxylated sulfate surfactants for improved oil recovery. Tenside 47:152–161

    CAS  Google Scholar 

  4. Panswad D, Sabatini DA, Khaodhiar S (2011) Precipitation and micellar properties of novel mixed anionic extended surfactants and a cationic surfactant. J Surf Deterg 14:577–583

    Article  CAS  Google Scholar 

  5. Shupe RD (1989) Process for secondary oil recovery utilizing propoxylated ethoxylated surfactants in sea water. US Patent 4,886,120, 12 Dec 1989

  6. Gale WW et al. (1981) Propoxylated ethoxylated surfactant and method of recovering oil therewith. US Patent 4,293,428, 6 Oct 1981

  7. Puerto MC (1986) Propoxylated surfactants for enhanced oil recovery in the range between high and low salinities. UK Patent Application GB 2168095A, 11 June 1986

  8. Levitt DB et al. (2006) Identification and evaluation of high-performance EOR surfactants. 2006 SPE/DOE symposium on improved oil recovery, Tulsa, OK, SPE 100089

  9. Wu Y, Shuler P, Blanco M, Tang Y, Goddard WA (2005) A study of branched alcohol propoxylate sulfate surfactants for improved oil recovery. 2005 SPE annual technical conference, Dallas, TX, SPE 95404

  10. Kiran SM, Acosta EJ (2010) Predicting the morphology and viscosity of microemulsions using the HLD-NAC model. Ind Eng Chem Res 49:3424–3432

    Article  CAS  Google Scholar 

  11. Acosta EJ, Bhakta AS (2008) The HLD-NAC model for mixtures of ionic and non-ionic surfactants. J Surf Deterg 12:7–19

    Article  Google Scholar 

  12. Acosta E, Szekeres E, Sabatini DA, Harwell JH (2003) Net-average curvature model for solubilization and supersolubilization in surfactant microemulsions. Langmuir 19:186–195

    Article  CAS  Google Scholar 

  13. Salager JL, Morgan J, Schechter RS, Wade WH, Vasquez E (1979) Optimum formulation of surfactant-oil-water systems for minimum tension and phase behavior. Soc Petrol Eng J 19:107–115

    Google Scholar 

  14. Salager JL, Márquez N, Graciaa A, Lachaise J (2000) Partitioning of ethoxylated octylphenol surfactants in microemulsion-oil-water systems: influence of temperature and relation between partitioning coefficient and physicochemical formulation. Langmuir 16:5534–5539

    Article  CAS  Google Scholar 

  15. Acosta E, Yuan J, Bhakta A (2008) The characteristic curvature of ionic surfactants. J Surf Deterg 11:145–158

    Article  CAS  Google Scholar 

  16. Hammond CE, Acosta E (2012) On the characteristic curvature of alkyl-polypropylene oxide sulfate extended surfactants. J Surf Deterg 15:157–165

    Article  CAS  Google Scholar 

  17. Acosta E (2008) The HLD-NAC equation of state for microemulsions formulated with nonionic alcohol ethoxylate and alkylphenol ethoxylate surfactants. Colloids Surf A 320:193–204

    Article  CAS  Google Scholar 

  18. Huh C (1979) Interfacial tensions and solubilizing ability of a microemulsion phase that coexists with oil and brine. J Colloid Interface Sci 71:408–426

    Article  CAS  Google Scholar 

  19. Acosta EJ, Le MA, Harwell JH, Sabatini DA (2003) Coalescence and solubilization kinetics in linker-modified microemulsions and related systems. Langmuir 19:566–574

    Article  CAS  Google Scholar 

  20. Witthayapanyanon A, Phan TT, Heitmann TC, Harwell JH, Sabatini DA (2010) Interfacial properties of extended-surfactant-based microemulsions and related macroemulsions. J Surf Deterg 13:127–134

    Article  CAS  Google Scholar 

  21. Witthayapanyanon A, Harwell JH, Sabatini DA (2008) Hydrophilic-lipophilic deviation (HLD) method for characterizing conventional and extended surfactants. J Colloid Interface Sci 325:259–266

    Article  CAS  Google Scholar 

  22. Rosen MJ (2004) Surfactants and interfacial phenomena, 3rd edn. Wiley, New York, p 55

    Book  Google Scholar 

  23. Witthayapanyanon A, Acosta EJ, Harwell JH, Sabatini DA (2006) Formulation of ultralow interfacial tension systems using extended surfactants. J Surfactants Deterg 9:331–339

    Article  CAS  Google Scholar 

  24. Klaus A, Tiddy GJT, Touraud D, Schramm A, Stühler G, Drechsler M, Kunz W (2010) Phase behavior of an extended surfactant in water and a detailed characterization of the dilute and semidilute phases. Langmuir 26:5435–5443

    Article  CAS  Google Scholar 

  25. Velásquez J, Scorzza C, Vejar F, Forgiarini AM, Antón RE, Salager J-L (2010) Effect of temperature and other variables on the optimum formulation of anionic extended surfactant-alkane-brine systems. J Surfactants Deterg 13:69–73

    Article  Google Scholar 

  26. Salager JL, Forgiarini A, Scorzza C, Tolosa L, Velasquez J (2010) Extended surfactants: a fine-tuned structure to improve interfacial performance through a gradual polarity transition. Oral presentation at the 101st American Oil Chemists Society, Phoenix, AZ, 17 May

  27. Gompper G, Schick M (1990) Correlation between structural and interfacial properties of amphiphilic systems. Phys Rev Let 65:1116–1119

    Article  CAS  Google Scholar 

  28. Kellay H, Binks BP, Hendrikx Y, Lee LT, Meunier J (1994) Properties of surfactant monolayers in relation to microemulsion phase behaviour. Adv Colloid Interface Sci 49:85–112

    Article  CAS  Google Scholar 

  29. Bourrel M, Schechter R (1988) Microemulsions and related systems. Marcel Dekker, New York

    Google Scholar 

  30. Salager JL, Antón RE, Sabatini DA, Harwell JH, Acosta EJ, Tolosa LI (2005) Enhancing solubilization in microemulsions—state of the art and current trends. J Surf Deterg 8:3–21

    Article  CAS  Google Scholar 

  31. De Gennes PG, Taupin C (1982) Microemulsions and the flexibility of oil/water interfaces. J Phys Chem 86:2294–2304

    Article  Google Scholar 

  32. Forgiarini AM, Scorzza C, Velásquez J, Vejar F, Zambrano E, Salager J-L (2010) Influence of the mixed propoxy/ethoxy spacer arrangement order and of the ionic head group nature on the adsorption and aggregation of extended surfactants. J Surfactants Deterg 13:451–458

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S3E5, Canada

    Edgar J. Acosta & Sumit K. Kiran

  2. Sasol North America Inc, 2201 Spanish Trail, Westlake, LA, 70669, USA

    Charles E. Hammond

Authors
  1. Edgar J. Acosta
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  2. Sumit K. Kiran
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  3. Charles E. Hammond
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Correspondence to Edgar J. Acosta.

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Acosta, E.J., Kiran, S.K. & Hammond, C.E. The HLD-NAC Model for Extended Surfactant Microemulsions. J Surfact Deterg 15, 495–504 (2012). https://doi.org/10.1007/s11743-012-1343-2

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  • DOI: https://doi.org/10.1007/s11743-012-1343-2

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