Dispersion of multi-walled carbon nanotubes in PDMS/PB blend
- Authors
- Hong, Joung Sook; Kim, Chongyoup
- Issue Date
- 12월-2011
- Publisher
- SPRINGER
- Keywords
- Extensional flow; Pinch-off mechanism; CNT disentanglement
- Citation
- RHEOLOGICA ACTA, v.50, no.11-12, pp.955 - 964
- Indexed
- SCIE
SCOPUS
- Journal Title
- RHEOLOGICA ACTA
- Volume
- 50
- Number
- 11-12
- Start Page
- 955
- End Page
- 964
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111054
- DOI
- 10.1007/s00397-011-0581-y
- ISSN
- 0035-4511
- Abstract
- In this study, the sequential dispersion of multi-walled carbon nanotubes (CNTs) in PDMS/PB (polydimethylsiloxane/polybutene) blends and the change of blend morphology by the dispersion of CNTs were investigated by rheological and morphological observations. The dispersion of CNTs into PDMS/PB blend was accomplished by the dilution of the CNT master (2 wt.% CNT in PDMS) in PDMS/PB blend using an extensional mixer. The morphological study shows that under the extensional flow, CNTs in the dispersed CNT master phase are mainly broken up by tip-streaming and the continuous pinching-off of PDMS drops during morphology evolution enhances the dispersion of CNT. It has been shown that CNTs can be disentangled as in the case of dispersing CNTs in a Boger fluid. Rheological data and TEM observations show that it is not simply a mixing of two phases and the CNTs in the master phase can be dispersed in the single CNT level.
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