In this paper, self-consistent field theory is used to study the depletion interaction between spherical micelles and planar substrate induced by polymer solvents. In this system, diblock copolymers form micelles and homopolymer solvents act as depletion initiators. When the spherical micelle approaches the planar substrate, the depletion interaction will allow the micelle to be adsorbed near the substrate. The structure between the substrate and the bulk is controlled through adjusting the amplitude of the attractive interaction of the substrate, which results in the regulation of the depletion interaction.
ZHOU Jingyu
,
ZHANG Xinghua
,
MIAO Bing
. Regulating depletion interaction between micelle and selective substrate[J]. Journal of University of Chinese Academy of Sciences, 2018
, 35(3)
: 314
-319
.
DOI: 10.7523/j.issn.2095-6134.2018.03.005
[1] Oosawa F, Asakura S. Surface tension of high-polymer solutions[J]. J Chem Phys, 1954, 22(7):1255.
[2] Li W H, Ma H R. Entropic interactions on a colloidal sphere near the edge of a terrace[J]. Eur Phys J E, 2003, 12(2):321-324.
[3] Li W H, Ma H R. Depletion force and torque on an ellipsoid[J]. J Chem Phys, 2003, 119(1):585-589.
[4] Li W H, Yang T, Ma H R. Depletion potentials in colloidal mixtures of hard spheres and rods[J]. J Chem Phys, 2008, 128(4):044910.
[5] Miao H, Li Y, Ma H R. Depletion interaction between two ellipsoids[J]. J Chem Phys, 2014, 140(15):154904.
[6] Li W H, Ma H R. Depletion potential near curved surfaces[J]. Phys Rev E, 2002, 66(6 Pt 1):061407.
[7] Glandt E D. Density distribution of hard-spherical molecules inside small pores of various shapes[J]. J Colloid Interf Sci, 1980, 77(2):512-524.
[8] Mao Y, Cates M E, Lekkerkerker H N W. Depletion force in colloidal systems[J]. Physica A, 1995, 222(1-4):10-24.
[9] Walz J Y, Sharma A. Effect of long range interactions on the depletion force between colloidal particles[J]. J Colloid Interf Sci, 1994, 168(2):485-496.
[10] Biben T, Bladon P, Frenkel D. Depletion effects in binary hard-sphere fluids[J]. J Phys Condensed Mat, 1996, 8(50):10799-10821.
[11] Asakura S, Oosawa F. Interaction between particles suspended in solutions of macromolecules[J]. J Polym Sci, 1958, 33(126):183-192.
[12] Mao Y, Cates M E, Lekkerkerker H N W. Depletion stabilization by semidilute rods[J]. Phys Rev Lett, 1995, 75(24):4548-4551.
[13] Mao Y, Cates M E, Lekkerkerker H N W. Theory of the depletion force due to rodlike polymers[J]. J Chem Phys, 1997, 106(9):3721-3729.
[14] Mao Y, Bladon P, Lekkerkerker H N W, et al. Density profiles and thermodynamics of rod-like particles between parallel walls[J]. Molec Phys, 1997, 92(1):151-159.
[15] Piech M, Walz J Y. Depletion interactions produced by nonadsorbing charged and uncharged spheroids[J]. J Colloid Interf Sci, 2000, 232(1):86-101.
[16] Oversteegen S M, Lekkerkerker H N W. On the accuracy of the Derjaguin approximation for depletion potentials[J]. Physica A, 2004, 341(1):23-39.
[17] Henderson J R. Depletion interactions in colloidal fluids:statistical mechanics of Derjaguin's analysis[J]. Physica A, 2002, 313(3/4):321-335.
[18] Lekkerkerker H N W, Tuinier R. Colloids and the depletion interaction[M]//Lecture Notes in Physics, Springer Netherlands, 2011.