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Diblock polyampholytes at the silicon-water interface: Adsorption as a function of block ratio and molecular weight

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Mahltig, B. [autre] Gohy, Jean-François [UCL] Jérôme, R. [autre] Stamm, M. [autre]

Polyampholytes are highly charged macromolecules carrying oppositely charged functional groups. This article reports on the adsorption of a weak diblock polyampholyte, poly(methacrylic acid)-block-poly[(dimethylamino)ethyl methacrylate], as a function of the copolymer composition and molecular weight. The adsorption experiments were performed on silicon substrates from aqueous polymer solutions at different pHs. The amount of adsorbed polyampholyte chains to the surface was determined by ellipsometry, whereas lateral structures were investigated by scanning force microscopy. A strong influence of pH on the adsorbed amount and the lateral structure formation at the surface was observed. Especially at the isoelectric point, drastic changes in adsorption behavior were detected. At low molecular weights, an increased adsorbed amount was detected, a behavior in contrast to common theoretical predictions. This phenomenon is explained by the high stability of absorbed micelles, which cover the silicon surface as a dense layer. We conclude that micelle formation is an important process for polyampholyte adsorption, which needs to be taken into account more explicitly.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2001
Language Anglais
Journal information "Journal of Polymer Science, Part B: Polymer Physics" - Vol. 39, no.6, p. 709-718 (2001)
Peer reviewed yes
issn 0887-6266
Publication status Publié
Affiliations ULg (Université de Liège) - CERM (Centre d'Etude et de Recherche sur les Macromolécules)
UCL - Autre
Keywords Adsorption ; Silicon ; Solutions ; Diblock polyampholytes ; Scanning force microscopy ; Block copolymers ; Ellipsometry ; Interfaces (materials) ; Macromolecules ; Micelles ; Microscopic examination ; Molecular weight ; PH effects ; Polyelectrolytes
Links
  1. Förster, Adv Polym Sci, 120, 133 (1995)
  2. Kudaibergenov, Adv Polym Sci, 144, 115 (1999)
  3. Böhm, Colloid Polym Sci, 275, 73 (1997)
  4. Duivenvoorde, Prog Org Coat, 36, 225 (1999)
  5. Claesson, Colloids Surf A, 93, 293 (1994)
  6. Buchhammer, Langmuir, 15, 4306 (1999)
  7. ; ; ; ; ; Polyelectrolytes; Hanser: Munich, 1994; pp 272-378.
  8. Musabekov, Macromol Chem Phys, 199, 401 (1998)
  9. Makino, Polym Repr, 33, 476 (1992)
  10. Higgs, J Chem Phys, 94, 1543 (1991)
  11. Wittmer, Europhys Lett, 24, 263 (1993)
  12. Kantor, Europhys Lett, 27, 643 (1994)
  13. Diehl, Phys Rev E, 54, 6516 (1996)
  14. Everaers, Europhys Lett, 37, 275 (1997)
  15. Kantor, Phys Rev E, 49, 1383 (1994)
  16. Dobrynin, J Phys II, 5, 677 (1995)
  17. Merle, J Phys Chem, 91, 3092 (1987)
  18. Skouri, Macromolecules, 27, 69 (1994)
  19. Giebeler, Macromol Chem Phys, 198, 3815 (1997)
  20. Patrickios, Langmuir, 15, 1613 (1999)
  21. Harrison, Colloid Polym Sci, 277, 48 (1999)
  22. Ohlemacher, J Polym Sci Part B: Polym Phys, 34, 2747 (1996)
  23. Goloub, Macromolecules, 32, 8441 (1999)
  24. Muthukumar, J Chem Phys, 86, 7230 (1987)
  25. van de Steeg, Langmuir, 8, 2538 (1992)
  26. Hoogeveen, Faraday Discuss, 98, 161 (1994)
  27. Amiel, Macromolecules, 28, 3125 (1995)
  28. Cohen Stuart, Adv Colloid Interface Sci, 34, 477 (1991)
  29. Werner, Colloids Surf A, 156, 3 (1999)
  30. Norde, Adv Colloid Interface Sci, 25, 267 (1986)
  31. Müller, Macromol Symp, 103, 55 (1996)
  32. Joanny, J Phys II, 4, 1281 (1994)
  33. Dobrynin, Macromolecules, 30, 4332 (1998)
  34. Dobrynin, Macromolecules, 32, 5689 (1999)
  35. Netz, Macromolecules, 31, 5123 (1998)
  36. Blaakmeer, J Colloid Interface Sci, 140, 314 (1990)
  37. Kamiyama, Macromolecules, 25, 5081 (1992)
  38. Neyret, J Colloid Interface Sci, 176, 86 (1995)
  39. Kato, Langmuir, 15, 4302 (1999)
  40. Walter, Langmuir, 15, 1260 (1999)
  41. Mahltig, Phys Chem Chem Phys, 1, 3853 (1999)
  42. Walter, Langmuir, 15, 6984 (1999)
  43. Mahltig, Colloid Polym Sci, 278, 502 (2000)
  44. Spatz, Macromolecules, 29, 3220 (1996)
  45. Meiners, J Appl Phys, 80, 2224 (1996)
  46. Li, J Am Chem Soc, 118, 10892 (1996)
  47. Meiners, Macromolecules, 30, 4945 (1997)
  48. Talingting, Langmuir, 16, 862 (2000)
  49. Creutz, Macromolecules, 30, 6 (1997)
  50. Antoun, Macromolecules, 30, 1556 (1997)
  51. Creutz, Macromolecules, 30, 4078 (1997)
  52. Motschmann, Macromolecules, 15, 3681 (1991)
  53. McCrackin Frank L., Passaglia Elio, Stromberg Robert R., Steinberg Harold L., Measurement of the thickness and refractive index of very thin films and the optical properties of surfaces by ellipsometry, 10.6028/jres.067a.040
  54. ; Ellipsometry and Polarized Light; North Holland: Amsterdam, 1987; pp 753-775.
  55. Siqueira, Langmuir, 11, 1680 (1995)
  56. Mes, J Polym Sci Part B: Polym Phys, 37, 593 (1999)
  57. Kramarenko, Macromolecules, 32, 3495 (1999)
  58. Potemkin, Langmuir, 15, 7290 (1999)
  59. Hoeve, J Chem Phys, 44, 1505 (1966)
  60. Eirich, J Colloid Interface Sci, 58, 423 (1977)
  61. Blaakmeer, Macromolecules, 23, 2301 (1990)
  62. Wind, Colloid Polym Sci, 276, 903 (1998)
  63. Kawaguchi, Macromolecules, 17, 2066 (1984)
Bibliographic reference Mahltig, B. ; Gohy, Jean-François ; Jérôme, R. ; Stamm, M.. Diblock polyampholytes at the silicon-water interface: Adsorption as a function of block ratio and molecular weight. In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 39, no.6, p. 709-718 (2001)
Permanent URL http://hdl.handle.net/2078/131289