Study of the particles' structure dependent rheological behavior for polymer nanospheres based shear thickening fluid

被引：29
作者：
Jiang, Wangquan [1 ]
Ye, Fang [1 ]
He, Qianyun [2 ]
Gong, Xinglong [2 ]
Feng, Jiabin [2 ]
Lu, Lei [2 ]
Xuan, Sliouhu [2 ]
机构：
[1] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China
[2] USTC, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 413卷
基金：
中国国家自然科学基金;
关键词：
Shear thickening; Rheological properties; Poly(styrene-acrylic acid) nanospheres; Viscosity; Mechanism; DILATANT VISCOSITY BEHAVIOR; CONCENTRATED SUSPENSIONS; NANOPARTICLE SUSPENSIONS; FLOW; DISPERSIONS; STEADY; FORCES; SIZE;
D O I：
10.1016/j.jcis.2013.09.020
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 novel kind of shear thickening fluid (STF) was developed via dispersing poly(styrene-acrylic acid) (PSAA) nanospheres into ethylene glycol (EG). By varying the structure characteristics of the PS-AA particles, STFs with different rheological properties can be obtained. Firstly, the influence of the styrene/acrylic acid ratio on the PS-AA nanospheres was investigated. It was found that the higher ratio often led to the better shear thickening (ST) effects and under the optimum condition the maximum viscosity of the STF could reach to 152 Pa s, while the ST effects decreased under further increasing the monomer ratio. Then, the divinyl benzene (DVB) was introduced to increase the cross-link density of the PS-AA. In comparison with the non-cross-link PS-AA nanospheres, the poly(styrene-acrylic acid-divinyl benzene) (PS-AA-DVB) based STFs exhibited much higher ST effects and the maximum viscosity was up to 385 Pa s when the DVB was only increased to 0.3%. In combination of the rheological properties and the structure characterization, a possible mechanism for the ST behavior was proposed and the influence of the particles' characteristics on the mechanical performance of the PS-AA based STF was carefully analyzed. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码：8 / 16
页数：9
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