Accession Number:

AD1062214

Title:

Graphene/Polyamide Laminates for Supercritical CO2 and H2S Barrier Applications: An Approach toward Permeation Shutdown

Descriptive Note:

Journal Article - Open Access

Corporate Author:

University of Manchester Manchester United Kingdom

Personal Author(s):

• Raine,Thomas P.
• Istrate,Oana M.
• King,Barnaby E.
• Craster,Bernadette
• Kinloch,Ian A.
• Budd,Peter M.

Report Date:

2018-05-02

Pagination or Media Count:

6.0

Abstract:

Graphene is potentially the perfect barrier material, being impermeable even to the smallest gas molecules, but in practice it is difficult to achieve defect-free graphene layers at large scale. Here, exceptional barrier performance for laminates comprising graphene nanoplatelet GNP paper sandwiched between two discs of polyamide 11 PA11 is demonstrated. Results are compared with sandwich structures incorporating melt-processed GNPPA11 composites, and with chemical vapor deposition CVD monolayer graphene transferred onto PA11. PA11 is of interest as a polymer commonly utilized within the oil and gas industry for antiwear and barrier layers in flexible risers. Permeation studies were undertaken for a feed mixture of carbon dioxide CO2 with 1.48 hydrogen sulfide H2S at a temperature of 60 C and pressures up to 400 bar, providing the first data for the performance of graphene as a barrier to a supercritical fluid. Whereas a GNPPA11 composite and a CVD graphene monolayer have little effect on permeability, compared to a pure PA11 control sample, a GNPPA11 laminate reduces CO2 permeability by more than an order of magnitude, and reduces H2S permeability to an undetectable level.Graphene is potentially the perfect barrier material, being impermeable even to the smallest gas molecules, but in practice it is difficult to achieve defect-free graphene layers at large scale. Here, exceptional barrier performance for laminates comprising graphene nanoplatelet GNP paper sandwiched between two discs of polyamide 11 PA11 is demonstrated. Results are compared with sandwich structures incorporating melt-processed GNPPA11 composites, and with chemical vapor deposition CVD monolayer graphene transferred onto PA11. PA11 is of interest as a polymer commonly utilized within the oil and gas industry for antiwear and barrier layers in flexible risers.

Descriptors:

• laminates
• graphene
• POLYAMIDE PLASTICS
• CARBON DIOXIDE
• hydrogen
• SULFIDES
• BARRIERS
• SANDWICH CONSTRUCTION
• chemical vapor deposition
• PERMEABILITY
• transport properties

Subject Categories:

• Laminates and Composite Materials
• Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE