Signatures of Overaging in an Aqueous Dispersion of Carbopol

被引:13
作者
Agarwal, Mayank [1 ]
Kaushal, Manish [2 ]
Joshi, Yogesh M. [1 ]
机构
[1] Indian Inst Technol Kanpur, Dept Chem Engn, Kanpur 208016, Uttar Pradesh, India
[2] Indian Inst Technol Kharagpur, Dept Chem Engn, Kharagpur 721302, W Bengal, India
关键词
YIELD-STRESS FLUIDS; RHEOLOGICAL PROPERTIES; VISCOSITY BIFURCATION; RESIDUAL-STRESSES; COLLOIDAL GLASSES; SOFT; SHEAR; FLOW; RELAXATION; MICROGEL;
D O I
10.1021/acs.langmuir.0c02887
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this work, we study the effect of the deformation field on the physical aging 15 behavior of an aqueous Carbopol dispersion. It is composed of soft swollen particles of gel that get deformed and acquire a polygonal shape, with flat interfaces rendering the dispersion a soft solid-like consistency as filled volume fraction approaches unity. It has been proposed that owing to release of stored elastic energy in the deformed particles, Carbopol dispersion undergoes microstructural evolution that is reminiscent of physical aging in soft glassy materials. We observe that application of moderate magnitude of oscillatory strain to Carbopol dispersion slows down its relaxation dynamics, thereby showing characteristics of overaging. On the other hand, the sufficiently high magnitude of strain makes the relaxation dynamics faster, causing to rejuvenation. We also solve the soft glassy rheology model, which, when subjected to the same flow field, corroborates with experimental observations on the Carbopol dispersion. This behavior, therefore, suggests that in a system of jammed soft particles of Carbopol, the particles occupying shallow energy wells upon application of moderate strain field adjust themselves in such a manner that they predominantly occupy the deeper energy wells leading to observe the overaging dynamics.
引用
收藏
页码:14849 / 14863
页数:15
相关论文
共 124 条
[61]  
Lee H, 2006, IEEE VTS VEH TECHNOL, P241
[62]   Physical aging and compressed exponential behaviors in a model soft colloidal system [J].
Li, Qi ;
Peng, Xiaoguang ;
McKenna, Gregory B. .
SOFT MATTER, 2019, 15 (11) :2336-2347
[63]   Power-law creep and residual stresses in a carbopol gel [J].
Lidon, Pierre ;
Villa, Louis ;
Manneville, Sebastien .
RHEOLOGICA ACTA, 2017, 56 (03) :307-323
[64]   Nonlinear dynamics - Jamming is not just cool any more [J].
Liu, AJ ;
Nagel, SR .
NATURE, 1998, 396 (6706) :21-22
[65]   A modern look on yield stress fluids [J].
Malkin, Alexander ;
Kulichikhin, Valery ;
Ilyin, Sergey .
RHEOLOGICA ACTA, 2017, 56 (03) :177-188
[66]   Yielding and flow of monodisperse emulsions [J].
Mason, TG ;
Bibette, J ;
Weitz, DA .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1996, 179 (02) :439-448
[67]   Osmotic pressure and viscoelastic shear moduli of concentrated emulsions [J].
Mason, TG ;
Lacasse, MD ;
Grest, GS ;
Levine, D ;
Bibette, J ;
Weitz, DA .
PHYSICAL REVIEW E, 1997, 56 (03) :3150-3166
[68]   Mechanical rejuvenation in polymer glasses: fact or fallacy? [J].
McKenna, GB .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (11) :S737-S763
[69]   Soft colloidal matter: A phenomenological comparison of the aging and mechanical responses with those of molecular glasses [J].
McKenna, Gregory B. ;
Narita, Tetsuharu ;
Lequeux, Francois .
JOURNAL OF RHEOLOGY, 2009, 53 (03) :489-516
[70]   Slip and flow in soft particle pastes [J].
Meeker, SP ;
Bonnecaze, RT ;
Cloitre, M .
PHYSICAL REVIEW LETTERS, 2004, 92 (19) :198302-1