Fabrication of a superhydrophobic and oleophobic PTFE membrane: An application to selective gas permeation
Source abstract
Abstract
Abstract A superhydrophobic and oleophobic film was fabricated on polytetrafluoroethylene (PTFE) using SiO 2 nanoparticles and 1H , 1H , 2H , 2H -perfluorooctyltrichlorosilane (FOTS). The surface of the bare PTFE sheet was first coated with SiO 2 nanoparticles by the dip-coating method, and FOTS was subsequently deposited on the SiO 2 -coated PTFE by either dip-coating or vapor deposition. Both of the FOTS-coated PTFE samples prepared using either dip-coating or vapor deposition initially showed high repellence towards water and hexadecane droplets. The FOTS-PTFE prepared by vapor deposition gradually absorbed hexadecane. By contrast, the dip-coated FOTS-PTFE displayed a durable non-wetting property, even after exposure to acidic/basic solutions and UV light irradiation. Gas permeability of the prepared superhydrophobic and oleophobic PTFE sheets towards CO 2 and dimethyl methylphosphonate (DMMP) vapor was also determined. We suggest that our superhydrophobic and oleophobic membrane could be used as the shielding layer of a gas sensor, to repel various liquids and only allow transmission of gases.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Advanced Sensor and Energy Harvesting Materials · Gas Dynamics and Kinetic Theory
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
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