Effects of particle softness on shear thickening of microgel suspensions

被引：25
作者：
Zhou, Zhi [1 ,2 ]
Hollingsworth, Javoris V. [1 ]
Hong, Song [3 ]
Wei, Guangmin [1 ]
Shi, Yu [1 ]
Lu, Xi [1 ]
Cheng, He [4 ,5 ]
Han, Charles C. [1 ]
机构：
[1] Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing Natl Lab Mol Sci,Inst Chem, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Beijing Univ Chem Technol, Anal & Test Ctr, Beijing 10029, Peoples R China
[4] Chinese Acad Sci, IHEP, CSNS, Dongguan 523803, Peoples R China
[5] DINS, Dongguan 523808, Peoples R China
来源：
SOFT MATTER | 2014年 / 10卷 / 33期
基金：
美国国家科学基金会;
关键词：
ANGLE NEUTRON-SCATTERING; CORE-SHELL LATEX; VOLUME-PHASE-TRANSITION; FLOW-INDUCED STRUCTURE; COLLOIDAL DISPERSIONS; DENSE SUSPENSIONS; BROWNIAN SUSPENSIONS; X-RAY; RHEOLOGY; TEMPERATURE;
D O I：
10.1039/c4sm01181c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of microgel particles composed of a polystyrene (PS) core and a thermo-sensitive poly(N-isopropylacrylamide) (PNIPAM) shell with different shell thicknesses were investigated to elucidate the effect of microgel softness on its shear thickening behavior. Since the softness of the microgels increases with decreasing temperature through the volume phase transition effect of PNIPAM shell, the measured softness parameter, n, which is derived from the Zwanzig-Mountain equation, was used to measure and describe the combined influences of temperature and shell thickness. Confocal microscopy is used to investigate the interaction potential between microgel particles with different softness parameters. According to the obtained results, the softness parameter can provide an estimate for the shear thickening behavior of microgel suspensions, at least semi-quantitatively.
引用
收藏
页码：6286 / 6293
页数：8
相关论文
共 57 条
  • [1] EFFECT OF BROWNIAN-MOTION ON BULK STRESS IN A SUSPENSION OF SPHERICAL-PARTICLES
    BATCHELOR, GK
    [J]. JOURNAL OF FLUID MECHANICS, 1977, 83 (NOV) : 97 - 117
  • [2] From shear thickening to shear-induced jamming
    Bertrand, E
    Bibette, J
    Schmitt, V
    [J]. PHYSICAL REVIEW E, 2002, 66 (06): : 3
  • [3] TIME-DEPENDENT BEHAVIOR AND WALL SLIP IN CONCENTRATED SHEAR THICKENING DISPERSIONS
    BOERSMA, WH
    BAETS, PJM
    LAVEN, J
    STEIN, HN
    [J]. JOURNAL OF RHEOLOGY, 1991, 35 (06) : 1093 - 1120
  • [4] THE RHEOLOGY OF BROWNIAN SUSPENSIONS
    BOSSIS, G
    BRADY, JF
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (03) : 1866 - 1874
  • [5] THE RHEOLOGY OF CONCENTRATED SUSPENSIONS OF SPHERES IN SIMPLE SHEAR-FLOW BY NUMERICAL-SIMULATION
    BRADY, JF
    BOSSIS, G
    [J]. JOURNAL OF FLUID MECHANICS, 1985, 155 (JUN) : 105 - 129
  • [6] The role of dilation and confining stresses in shear thickening of dense suspensions
    Brown, Eric
    Jaeger, Heinrich M.
    [J]. JOURNAL OF RHEOLOGY, 2012, 56 (04) : 875 - 923
  • [7] Brown E, 2010, NAT MATER, V9, P220, DOI [10.1038/NMAT2627, 10.1038/nmat2627]
  • [8] How hard is a colloidal "hard-sphere" interaction?
    Bryant, G
    Williams, SR
    Qian, L
    Snook, IK
    Perez, E
    Pincet, F
    [J]. PHYSICAL REVIEW E, 2002, 66 (06) : 4 - 060501
  • [9] LLS and FTIR studies on the hysteresis in association and dissociation of poly(N-isopropylacrylamide) chains in water
    Cheng, H
    Shen, L
    Wu, C
    [J]. MACROMOLECULES, 2006, 39 (06) : 2325 - 2329
  • [10] Imaging the Microscopic Structure of Shear Thinning and Thickening Colloidal Suspensions
    Cheng, Xiang
    McCoy, Jonathan H.
    Israelachvili, Jacob N.
    Cohen, Itai
    [J]. SCIENCE, 2011, 333 (6047) : 1276 - 1279
123456