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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/81733
- Spherulitic networks: from structure to rheological property
- Shi, Jing Hua; Liu, Xiang Yang; Li, Jing Liang; Strom, Christina S.; Xu, Hong Yao
- 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.
- Publication type
- Journal article
- Journal of Physical Chemistry B, Vol. 113, no. 14 (Apr 2009), pp. 4549-4554
- Publication year
- FOR Code(s)
- 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
- ABAQUS; Agar gels; Correlation lengths; Elastic properties; Fibre networks; Functional materials; Macroscopic properties; Microscopic structures; Network elasticities; Power laws; Rheological properties
- American Chemical Society
- Publisher URL
- Copyright © 2009 American Chemical Society.
- Peer reviewed