Study on the dispersibility of carbonyl iron powder in polydimethylsiloxane-based composites in the perspective of Gibbs free wetting energy
- Authors
- Ha, Heebo; Thompson, Russ; Lim, Sooman; Hwang, Byungil
- Issue Date
- Sep-2022
- Publisher
- Elsevier B.V.
- Keywords
- Carbonyl iron powder; Composites; Dodecenylsuccinic anhydride
- Citation
- Materials Letters, v.322
- Journal Title
- Materials Letters
- Volume
- 322
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/59481
- DOI
- 10.1016/j.matlet.2022.132513
- ISSN
- 0167-577X
1873-4979
- Abstract
- Enhancing the dispersibility of carbonyl iron powder (CIP) in polydimethylsiloxane (PDMS) is important for achieving high-performance CIP-based PDMS composites. The dispersibility of CIPs in the PDMS composites was explored in the perspective of Gibbs free wetting energy (ΔG). The CIP was coated with various wt% of dodecenylsuccinic anhydride (DDSA) from 0 to 1.0 wt%. The surface energy of CIP decreased as the DDSA increased up to 0.5 wt%, after which no further decrease in surface energy was observed. ΔG was calculated based on the measured surface characteristics, which showed a similar trend to those of surface energy. A microstructural analysis of CIP/PDMS composites revealed that the CIPs with smaller ΔG values showed a better dispersibility, which is consistent with the theoretical definition of ΔG. Our study proved an evaluation of ΔG allowed to predict the dispersibility of CIPs in PDMS composites. © 2022 Elsevier B.V.
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