Depletion interactions: A new control parameter for the self-assembly of diblock copolymer micelles

被引:32
作者
Abbas, Sayeed [1 ]
Lodge, Timothy P.
机构
[1] Univ Minnesota, Dept Chem & Chem Engn, Minneapolis, MN 55455 USA
[2] Univ Minnesota, Dept Mat Sci, Minneapolis, MN 55455 USA
关键词
D O I
10.1103/PhysRevLett.99.137802
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Small angle neutron scattering was performed on disordered mixtures of nonadsorbing homopolymer (A) chains and diblock (A-B) copolymer micelles in an A selective solvent. Increasing the molecular weight or concentration of A led to an increase in the aggregation number, and a decrease in the effective hard-sphere diameter of the micelles. Furthermore an intermicellar attractive force developed, which was successfully modeled by the Asakura-Oosawa depletion potential. Via an alternative model we also extracted information about mesoscopic clusters of micelles formed due to this attractive force.
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页数:4
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共 25 条
[1]   Temperature-dependent micellar structures in poly(styrene-b-isoprene) diblock copolymer solutions near the critical micelle temperature [J].
Bang, J ;
Viswanathan, K ;
Lodge, TP ;
Park, MJ ;
Char, K .
JOURNAL OF CHEMICAL PHYSICS, 2004, 121 (22) :11489-11500
[2]   STARLIKE MICELLES - THEIR GROWTH IN HOMOPOLYMER SOLUTIONS [J].
HALPERIN, A .
MACROMOLECULES, 1989, 22 (09) :3806-3807
[3]   Structure and arrangement of clusters in cluster aggregation [J].
Haw, MD ;
Poon, WCK ;
Pusey, PN .
PHYSICAL REVIEW E, 1997, 56 (02) :1918-1933
[4]   ANALYSIS OF SMALL-ANGLE NEUTRON-SCATTERING SPECTRA FROM POLYDISPERSE INTERACTING COLLOIDS [J].
KOTLARCHYK, M ;
CHEN, SH .
JOURNAL OF CHEMICAL PHYSICS, 1983, 79 (05) :2461-2469
[5]   Effects of polymer density fluctuations on depletion interactions [J].
Kulkarni, AM ;
Chatterjee, AP ;
Schweizer, KS ;
Zukoski, CF .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (8A) :A301-A307
[6]   Effective interactions in soft condensed matter physics [J].
Likos, CN .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 348 (4-5) :267-439
[7]   Origin of the thermoreversible fcc-bcc transition in block copolymer solutions [J].
Lodge, TP ;
Bang, J ;
Park, MJ ;
Char, K .
PHYSICAL REVIEW LETTERS, 2004, 92 (14) :145501-1
[8]   Effective potentials for polymers and colloids: beyond the van der Waals picture of fluids? [J].
Louis, AA .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2001, 359 (1782) :939-960
[9]   Fluids of clusters in attractive colloids [J].
Lu, PJ ;
Conrad, JC ;
Wyss, HM ;
Schofield, AB ;
Weitz, DA .
PHYSICAL REVIEW LETTERS, 2006, 96 (02)
[10]   EFFECTS OF HOMOPOLYMERS ON THE GEL FORMATION IN AQUEOUS BLOCK COPOLYMER SOLUTIONS [J].
MALMSTEN, M ;
LINDMAN, B .
MACROMOLECULES, 1993, 26 (06) :1282-1286