Influence of solvent quality and thermal fluctuations on polymer-mediated depletion interactions

被引:35
作者
Chatterjee, AP
Schweizer, KS
机构
[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
[2] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA
关键词
D O I
10.1021/ma981473h
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Analytic integral equation theory for treating athermal mixtures of hard spheres and polymers is extended to study thermal interaction and solvent duality effects in suspensions of infinitely dilute spherical particles in dilute and semidilute polymer solutions. Our approach applies to all sphere/ polymer size ratios, and polymer-polymer segmental attractive interactions are included using both liquid state and Flory-Huggins theory. The effect of such thermal interactions on the polymer-induced depletion potential between hard spheres is studied with emphasis on the sphere-sphere second virial coefficient and the free energy of particle insertion. Strong enhancement of the purely entropic attractive depletion interaction is found in the proximity of the polymer-solvent critical demixing point. The magnitude of this effect and the distance from the Theta temperature where it becomes important are sensitive to system specific factors.
引用
收藏
页码:923 / 934
页数:12
相关论文
共 49 条
  • [21] Local and microdomain concentration fluctuation effects in block copolymer solutions
    Guenza, M
    Schweizer, KS
    [J]. MACROMOLECULES, 1997, 30 (14) : 4205 - 4219
  • [22] Hansen J P., 2013, Theory of Simple Liquids: With Applications to Soft Matter
  • [23] EFFECTS OF POLYMER-SOLUTIONS ON COLLOID STABILITY
    JOANNY, JF
    LEIBLER, L
    DEGENNES, PG
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1979, 17 (06) : 1073 - 1084
  • [24] SMALL-ANGLE X-RAY-SCATTERING FROM SEMIDILUTE POLYMER-SOLUTIONS .2. POLYSTYRENE IN CYCLOHEXANE
    KINUGASA, S
    HAYASHI, H
    HAMADA, F
    NAKAJIMA, A
    [J]. MACROMOLECULES, 1986, 19 (11) : 2832 - 2840
  • [25] THE STATISTICAL MECHANICAL THEORY OF SOLUTIONS .1.
    KIRKWOOD, JG
    BUFF, FP
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1951, 19 (06) : 774 - 777
  • [26] KULKARNI AM, UNPUB LANGMUIR
  • [27] PHASE-BEHAVIOR OF COLLOID PLUS POLYMER MIXTURES
    LEKKERKERKER, HNW
    POON, WCK
    PUSEY, PN
    STROOBANTS, A
    WARREN, PB
    [J]. EUROPHYSICS LETTERS, 1992, 20 (06): : 559 - 564
  • [28] ON THE SPINODAL INSTABILITY OF HIGHLY ASYMMETRIC HARD-SPHERE SUSPENSIONS
    LEKKERKERKER, HNW
    STROOBANTS, A
    [J]. PHYSICA A, 1993, 195 (3-4): : 387 - 397
  • [29] DEPLETION STABILIZATION BY SEMIDILUTE RODS
    MAO, Y
    CATES, ME
    LEKKERKERKER, HNW
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (24) : 4548 - 4551
  • [30] COLLOIDS DISPERSED IN POLYMER-SOLUTIONS - A COMPUTER-SIMULATION STUDY
    MEIJER, EJ
    FRENKEL, D
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (09) : 6873 - 6887