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Volumn 103, Issue 45, 1999, Pages 9867-9872

Polymer-surfactant interaction and stability of amorphous colloidal particles

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EID: 0001257270     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp992032i     Document Type: Article
Times cited : (29)

References (50)
  • 4
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    • U.S. Patent 5,770,352.
    • Chan, K. U.S. Patent 5,770,352.
    • Chan, K.1
  • 5
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    • note
    • In general, there are two routes for phase changes between solid structures. In the first, the metastable solid undergoes an internal rearrangement of molecules or atoms and the transformation occurs in the solid state. In the second a solvent is involved that is in contact with the metastable phase. This allows it to dissolve and the stable phase to nucleate and grow independently from solution. We refer to the latter as solvent-mediated phase transformation. See ref 6 for details.
  • 9
    • 0004294969 scopus 로고
    • Butterworth-Heinemann: Oxford, U.K.
    • Mullin, J. W. Crystallization; Butterworth-Heinemann: Oxford, U.K., 1993.
    • (1993) Crystallization
    • Mullin, J.W.1
  • 10
    • 33645917565 scopus 로고    scopus 로고
    • U.S. Patent 5,256,527
    • Chari, K.; Beck, J. T. U.S. Patent 5,256,527.
    • Chari, K.1    Beck, J.T.2
  • 13
    • 0032656209 scopus 로고    scopus 로고
    • Chari, K. CHEMTECH 1999, 29 (6), 49.
    • (1999) CHEMTECH , vol.29 , Issue.6 , pp. 49
    • Chari, K.1
  • 14
    • 33645925219 scopus 로고    scopus 로고
    • References to synthesis of compounds of this type are given in a previous paper (see ref 11).
    • References to synthesis of compounds of this type are given in a previous paper (see ref 11).
  • 16
    • 33645932502 scopus 로고    scopus 로고
    • The thermodynamically stable form of the compound under ambient conditions is the crystalline form. See ref 12.
    • The thermodynamically stable form of the compound under ambient conditions is the crystalline form. See ref 12.
  • 25
    • 0003966222 scopus 로고
    • Matijevic, E.; Ed.; Wiley-Interscience: New York
    • Dynamic interfacial energy refers to the interfacial energy at a freshly formed or partially aged surface. In the time following the creation of the surface, it receives molecules of surface active components. The surface or interfacial energy decreases to its equilibrium or static value when adsorption or rearrangement of all surface active species is complete. See: Defay, R.; Petre, G. In Surface and Colloid Science; Matijevic, E.; Ed.; Wiley-Interscience: New York, 1971; Vol. 3.
    • (1971) Surface and Colloid Science , vol.3
    • Defay, R.1    Petre, G.2
  • 29
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    • Goodwin, J. W., Ed.; The Royal Society of Chemistry: London
    • Overbeek, J. Th. G. In Colloidal Dispersions; Goodwin, J. W., Ed.; The Royal Society of Chemistry: London, 1982.
    • (1982) Colloidal Dispersions
    • Th Overbeek, J.G.1
  • 32
    • 0010269858 scopus 로고
    • Chapman & Hall: London, Chapter 2.
    • The adsorption of polymer at the particle-fluid interface is governed by competition between affinity of segments for the surface and reduction in conformational entropy. The latter opposes unfolding of chains, giving rise to loops. The fraction of segments in loops (and tails) will be relatively low if there is strong attraction for the surface. See: Fleer, G. J.; Cohen Stuart, M. A.; Scheutjens, J. M. H. M.; Cosgrove, T.; Vincent, B. Polymers and Interfaces; Chapman & Hall: London, 1993; Chapter 2.
    • (1993) Polymers and Interfaces
    • Fleer, G.J.1    Cohen Stuart, M.A.2    Scheutjens, J.M.H.3    Cosgrove, T.4    Vincent, B.5
  • 34
    • 85085718056 scopus 로고    scopus 로고
    • note
    • 19,33 that the spectra of different nitroxide spin probes may respond differently to changes in microviscosity. However, comparison with published spectra of these probes in mixtures of glycerol and ethanol suggests that in this case the local environment is similarly restrictive at both locations along the chain (equivalent to a microviscosity of over 300 cP).
  • 35
    • 37049065092 scopus 로고
    • One may think of the doxylstearic acids as a probe of the available parking area for a molecule such as SDS at the particle-fluid interface. In other words, the results confirm that (even in the presence of adsorbed polymer) there is sufficient space for a molecule such as SDS to lie flat in this regime. See: Kipling, J. J.; Wright, E. H. M. J. Chem. Soc. 1962, 855.
    • (1962) J. Chem. Soc. , pp. 855
    • Kipling, J.J.1    Wright, E.H.M.2
  • 38
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    • note
    • Antalek, B.; Chari, K. Unpublished results. While it may be argued that formation of micelles above the cmc may solubilize the hydrophobic material and facilitate transport, we do not believe this is the primary mechanism for destabilization, as the existence of micelles below the cmc as part of the polymer-surfactant complex does not have such an effect. Previous studies have shown that polymer bound micelles are similar to regular micelles in terms of solubilizing insoluble dyes. See ref 23.
  • 45
    • 33645949622 scopus 로고    scopus 로고
    • note
    • 46 in the case of thermodynamically stable microemulsions, one usually requires the combination of an aqueous soluble surfactant and an oil-soluble surfactant so that the activity of the surfactants is not restricted by the formation of mixed micelles in the aqueous phase.


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