Dangnan, F, Espejo, C, Liskiewicz, T et al. (2 more authors) (2021) Water barrier performance of additively manufactured polymers coated with diamond-like carbon films. Diamond and Related Materials, 119. 108541. ISSN 0925-9635
Abstract
Whilst additive manufactured polymers have unique and useful properties, the deficiency of water barrier performance limits their shelf-life and functionality as a diffusion barrier for long life product durability. In this work, the induced modification of diamond-like carbon (DLC) coatings using nitrogen (N) (up to 2.02 at. %) to improve water barrier performance has been studied. DLC thin films were deposited onto additively manufactured polymers: acrylonitrile butadiene styrene (3D ABS) and Verogray polymers using microwave-plasma enhanced chemical vapour deposition (MW-PECVD) technique. Test results are described for two N-doped DLC films (a-C:N:H): DLC-1 and DLC-2 deposited at temperatures below 40 °C. Techniques such as Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), Raman spectroscopy, mercury injection capillary pressure (MICP) measurement and nanoindentation were utilised to study both material and film properties. A good correlation between film thickness and water barrier function for 3D ABS was found. However, for the Verogray samples, film thickness played a limited role in reducing the WVTR. Distinguishable microstructural pit-like defects present on the 3D ABS substrate were seen to promote a higher WVTR of 73.31 g/m2-day for the 3D ABS uncoated samples as compared with 28.8 g/m2-day for Verogray. The result from this test show strong evidence that DLC coatings could serve as a good water vapour barrier in additively manufactured polymer systems where polymer-water vapour contact may be required, especially in the packaging and food industry where modified atmospheric packaging may be required.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Elsevier B.V. All rights reserved. This is an author produced version of an article published in Diamond and Related Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Additive manufacturing; Barrier film; DLC coating; Polyjet technology; Water permeation; WVTR |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Aug 2021 12:37 |
Last Modified: | 29 Jul 2022 13:35 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.diamond.2021.108541 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:176566 |
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Filename: WVTR paper by Frank Dangnan -Final_.pdf
Licence: CC-BY-NC-ND 4.0