Highly hydrophobic polydimethylsiloxane-coated expanded vermiculite particles for selective oil removal from wateropen access
- Authors
- Nguyen, Duc Cuong; Bui, Trung Tuyen; Cho, Yeong Beom; Kim, Yong Shin
- Issue Date
- Feb-2021
- Publisher
- MDPI
- Keywords
- Expanded vermiculite; Oil sorbent; Oil-collecting; PDMS vapor deposition
- Citation
- Nanomaterials, v.11, no.2, pp 1 - 13
- Pages
- 13
- Indexed
- SCIE
SCOPUS
- Journal Title
- Nanomaterials
- Volume
- 11
- Number
- 2
- Start Page
- 1
- End Page
- 13
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/113930
- DOI
- 10.3390/nano11020367
- ISSN
- 2079-4991
2079-4991
- Abstract
- Naturally abundant vermiculite clay was expanded by using an aqueous solution of H2O2
and its surface was modified with ultra-thin polydimethylsiloxane (PDMS) using facile thermal vapor
deposition to prepare an ecologically friendly, low-cost oil sorbent that plays an important role in oil
spillage remediation. The resulting PDMS-coated expanded vermiculite (eVMT@PDMS) particles
exhibited adequate hydrophobicity and oleophilicity for oil/water separation, with numerous conical
slit pores (a size of 0.1–100 m) providing a great sorption capacity and an efficient capillarity-driven
flow pathway for oil collection. Simply with using a physically-packed eVMT@PDMS tube (or pouch),
selective oil removals were demonstrated above and beneath the surface of the water. Furthermore,
these sorbents were successfully integrated and then applied to the advanced oil-collecting devices
such as a barrel-shaped oil skimmer and a self-primed oil pump.
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