Shear-induced mesostructure in nanoplatelet-polymer networks

被引：34

作者：

Lin-Gibson, S ^{[1
]}

Schmidt, G ^{[1
]}

Kim, H ^{[1
]}

Han, CC ^{[1
]}

Hobbie, EK ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2003年 / 119卷 / 15期

关键词：

D O I：

10.1063/1.1609972

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：

The shear response of a model polymer-clay gel is measured using small-angle neutron and light scattering, optical microscopy, and rheometry. As the flow disrupts the transient network that forms between clay and polymer, coupling between composition and stress leads to the formation of a macroscopic domain pattern, while the clay platelets orient with their surface normal parallel to the direction of vorticity. We discuss similarities with shear-induced structural transitions observed in other complex fluids, and we offer a physical explanation for the orientation of the clay platelets. (C) 2003 American Institute of Physics.

引用

页码：8080 / 8083

页数：4

共 22 条

[11] Structure and formation of a gel of colloidal disks [J].

Kroon, M ;

Vos, WL ;

Wegdam, GH .

PHYSICAL REVIEW E, 1998, 57 (02) :1962-1970

[12] Evidence of a sponge-to-lamellar phase transition under shear by X-ray scattering experiments in a Couette cell [J].

Mahjoub, HF ;

Bourgaux, C ;

Serot, P ;

Kleman, M .

PHYSICAL REVIEW LETTERS, 1998, 81 (10) :2076-2079

[13] Dispersion visualization of model fluids in a transparent Couette flow cell [J].

Mighri, F ;

Huneault, MA .

JOURNAL OF RHEOLOGY, 2001, 45 (03) :783-797

[14] SHEAR MICROSCOPY OF THE BUTTERFLY PATTERN IN POLYMER MIXTURES [J].

MOSES, E ;

KUME, T ;

HASHIMOTO, T .

PHYSICAL REVIEW LETTERS, 1994, 72 (13) :2037-2040

[15] Coexistence and phase separation in sheared complex fluids [J].

Olmsted, PD ;

Lu, CYD .

PHYSICAL REVIEW E, 1997, 56 (01) :R55-R58

[16] Yield stress thixotropic clay suspension: Investigation of structure by light, neutron, and x-ray scattering [J].

Pignon, F ;

Magnin, A ;

Piau, JM ;

Cabane, B ;

Lindner, P ;

Diat, O .

PHYSICAL REVIEW E, 1997, 56 (03) :3281-3289

[17]

POCAR L, 2002, PHYS REV LETT, V89, P8301

[18] SWELLING AND DISPERSION OF SMECTITE CLAY COLLOIDS - DETERMINATION OF STRUCTURE BY NEUTRON-DIFFRACTION AND SMALL-ANGLE NEUTRON-SCATTERING [J].

RAMSAY, JDF ;

SWANTON, SW ;

BUNCE, J .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1990, 86 (23) :3919-3926

[19] NEMATIC TO SMECTIC-A PHASE-TRANSITION UNDER SHEAR-FLOW - A NONEQUILIBRIUM SYNCHROTRON X-RAY STUDY [J].

SAFINYA, CR ;

SIROTA, EB ;

PLANO, RJ .

PHYSICAL REVIEW LETTERS, 1991, 66 (15) :1986-1989

[20] Shear orientation of viscoelastic polymer-clay solutions probed by flow birefringence and SANS [J].

Schmidt, G ;

Nakatani, AI ;

Butler, PD ;

Karim, A ;

Han, CC .

MACROMOLECULES, 2000, 33 (20) :7219-7222

← 1 2 3 →