The Effect of Particle Shape on the Structure and Rheological Properties of Carbon-based Particle Suspensions

Ran Niu; Jiang Gong; Dong-hua Xu; Tao Tang; Zhao-yan Sun

doi:10.1007/s10118-015-1704-1

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The Effect of Particle Shape on the Structure and Rheological Properties of Carbon-based Particle Suspensions

PAPER | Updated：2021-06-21

- The Effect of Particle Shape on the Structure and Rheological Properties of Carbon-based Particle Suspensions
- Chinese Journal of Polymer Science Vol. 33, Issue 11, Pages: 1550-1561(2015)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  **Dong-hua Xu (许东华), E-mail: dhxu@ciac.ac.cn
  Zhao-yan Sun (孙昭艳), E-mail: zysun@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-015-1704-1
  CLC：
- Received：09 April 2015，
  
  Revised：2015-05-20，
  
  Accepted：22 May 2015，
  
  Published：2015-11
- Accepted：
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Ran Niu, Jiang Gong, Dong-hua Xu, et al. The Effect of Particle Shape on the Structure and Rheological Properties of Carbon-based Particle Suspensions[J]. Chinese Journal of Polymer Science, 2015, 33(11): 1550-1561.
DOI：

Ran Niu, Jiang Gong, Dong-hua Xu, et al. The Effect of Particle Shape on the Structure and Rheological Properties of Carbon-based Particle Suspensions[J]. Chinese Journal of Polymer Science, 2015, 33(11): 1550-1561. DOI： 10.1007/s10118-015-1704-1.

摘要

Abstract

The structure and rheological properties of carbon-based particle suspensions

i.e.

carbon black (CB)

multi-wall carbon nanotube (MWNT)

graphene and hollow carbon sphere (HCS) suspended in polydimethylsiloxane (PDMS)

are investigated. In order to study the effect of particle shape on the structure and rheological properties of suspensions

the content of surface oxygen-containing functional groups of carbon-based particles is controlled to be similar. Original spherical-like CB (fractal filler)

rod-like MWNT and sheet-like graphene form large agglomerates in PDMS

while spherical HCS particles disperse relatively well in PDMS. The dispersion state of carbon-based particles affects the critical concentration of forming a rheological percolation network. Under weak shear

negative normal stress differences (Δ

) are observed in CB

MWNT and graphene suspensions

while Δ

is nearly zero for HCS suspensions. It is concluded that the vorticity alignment of CB

MWNT and graphene agglomerates under shear results in the negative ΔN. However

no obvious structural change is observed in HCS suspension under weak shear

and accordingly

the ΔN is almost zero.

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