This study illustrates that amine functional groups on the ends of telechelic poly(dimethylsiloxane) (PDMS) can undergo post-processing reactions with surface epoxy groups on graphene oxide (GO) to form a robust elastomer during simple heating. In these materials, GO acts both as a nanofiller which reinforces the mechanical properties and participates as a multifunctional crosslinker, thereby promoting elastic properties. Experiments indicate that the telechelic PDMS/GO elastomer is highly crosslinked (e.g., more than 75 wt % is a non-dissolving crosslinked gel) but highly flexible such that it can be stretched up to 300% of its original length. Finally, the PDMS/GO elastomer was tested as a single gas barrier membrane and gas permeability was decreased ∼45% by incorporating 1 wt % (0.43 vol %) of GO, thereby highlighting its potential use in practical applications.
Bibliographical noteFunding Information:
The authors gratefully acknowledge the partial financial support from the Welch Foundation (grant #F-1709 ) and the Korea CCS R&D Center (KCRC) grant funded by the Ministry of Science, ICT & Future Planning from the Korean government (grant #2015M1A8A1053569 ). We would also like to acknowledge the Kwanjeong Educational Foundation for their financial support of H. Ha.
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- Amine-epoxy reaction
- Barrier membrane
- Graphene oxide
- Telechelic polymer