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Title: | Rheo-optical Analysis of Functionalized Graphene Suspensions | Authors: | REDDY, Naveen Natale, Giovanniantonio Prud'homme, Robert Vermant, Jan |
Issue Date: | 2018 | Source: | Langmuir, 34 (26), p. 8744-8751 | Status: | In Press | Abstract: | Wet processing of graphene sheets is a potentially interesting route for economically viable creation of graphene based composites. In the present work flow dichroism and small angle light scattering are used to investigate the dispersion of functionalized graphene sheets in suspension and their response to shear flow. In line with expectations from scaling theory at rest, the functionalized graphene sheets are present as Brownian, flat sheets, and there is no evidence of significant crumpling. More surprisingly, we find that the rate dependent orientation of these molecularly thin sheets can be described by numerical predictions for hard spheroidal sheets making quantitative predictions of the flow induced orientation possible. Further comparing the flow induced orientation of thick gold decahedra with the thin graphene sheets shows that, except for effects of polydispersity, the flow induced orientation is predicted well quantitatively. Adequate prediction of the effects of flow on orientation of graphene sheets makes it possible to design wet processed graphene based composite materials. | Notes: | Reddy, NK (reprint author), Hasselt Univ, Martelarenlaan 42, B-3500 Hasselt, Belgium ; IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. naveen.reddy@uhasselt.be | Document URI: | http://hdl.handle.net/1942/26215 | ISSN: | 0743-7463 | DOI: | 10.1021/acs.langmuir.8b01574 | ISI #: | 000438008200029 | Rights: | © 2018 American Chemical Society | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Graphene1-Langmuir.pdf | Peer-reviewed author version | 1.05 MB | Adobe PDF | View/Open |
acs.langmuir.8b01574.pdf Restricted Access | Published version | 1.4 MB | Adobe PDF | View/Open Request a copy |
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