Spherulitic networks : from structure to rheological property

Shi, Jing Hua, Liu, Xiang Yang, Li, Jing Liang, Strom, Christina S. and Xu, Hong Yao 2009, Spherulitic networks : from structure to rheological property, The journal of physical chemistry b, vol. 113, no. 14, pp. 4549-4554, doi: 10.1021/jp8035023.

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Title Spherulitic networks : from structure to rheological property
Author(s) Shi, Jing Hua
Liu, Xiang Yang
Li, Jing LiangORCID iD for Li, Jing Liang orcid.org/0000-0003-0709-2246
Strom, Christina S.
Xu, Hong Yao
Journal name The journal of physical chemistry b
Volume number 113
Issue number 14
Start page 4549
End page 4554
Total pages 6
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2009-04
ISSN 1520-6106
1520-5207
Summary A finite element method based on ABAQUS is employed to examine the correlation between the microstructure and the elastic response of planar Cayley treelike fiber networks. It is found that the elastic modulus of the fiber network decreases drastically with the fiber length, following the power law. The power law of elastic modulus G′ vs the correlation length ξ obtained from this simulation has an exponent of −1.71, which is close to the exponent of −1.5 for a single-domain network of agar gels. On the other hand, the experimental results from multidomain networks give rise to a power law index of −0.49. The difference between −1.5 and −0.49 can be attributed to the multidomain structure, which weakens the structure of the overall system and therefore suppresses the increase in G′. In addition, when the aspect ratio of the fiber is smaller than 20, the radius of the fiber cross-section has a great impact on the network elasticity, while, when the aspect ratio is larger than 20, it has almost no effect on the elastic property of the network. The stress distribution in the network is uniform due to the symmetrical network structure. This study provides a general understanding of the correlation between microscopic structure and the macroscopic properties of soft functional materials.
Language eng
DOI 10.1021/jp8035023
Field of Research 091205 Functional Materials
030603 Colloid and Surface Chemistry
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039275

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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