Next Article in Journal
Low-Power RFED Wake-Up Receiver Design for Low-Cost Wireless Sensor Network Applications
Next Article in Special Issue
The Feasibility of Equine Field-Based Postural Sway Analysis Using a Single Inertial Sensor
Previous Article in Journal
Analysis of Long Period Gratings Inscribed by CO2 Laser Irradiation and Estimation of the Refractive Index Modulation
Article

IR Imaging of Solid Lubricant Coatings on Concealed/Disjointed Surfaces for Transparent Polymer Delivery Device Applications

Centre for Advanced Photonics and Process Analysis, Cork Institute of Technology, T12 P928 Cork, Ireland
*
Authors to whom correspondence should be addressed.
Sensors 2020, 20(22), 6408; https://doi.org/10.3390/s20226408
Received: 25 September 2020 / Revised: 25 October 2020 / Accepted: 7 November 2020 / Published: 10 November 2020
(This article belongs to the Special Issue State-of-the-Art Sensors Technologies in Ireland 2020)
Transparent polymer delivery devices often contain a solid lubricant coating on a stronger bulk polymer. The distribution of lubricant coating must be monitored for device optimisation appraisals and to ensure consistency during mass production. However, coating evaluation is difficult to perform as surfaces are often concealed and/or disjointed. Dye stain analysis, which is destructive and time-consuming, is the current industry standard. We present a prototype IR transmission microscope to evaluate micron-level coating coverage of polyurethane and/or polyvinylpyrrolidone on a poly(propylene)-based delivery device. The device has a common industrial configuration, containing a duct and bevel. Inferred absorption of the coating was used to identify coating coverage and a multivariate analysis was used to remove the effects of absorption and scattering by the bulk. Coverage on concealed and disjointed surfaces was imaged and evaluated from a single camera viewpoint and ≈50 μm defects were detectable. The industrial applicability of the prototype was demonstrated using comparisons with dye stain analysis by estimating water dilution of coating and identifying artifacts in coating, which may indicate machine malfunction. The sensitivity and speed of the IR technique makes it a favourable alternative to the current industry standard. View Full-Text
Keywords: IR transmission imaging; multispectral imaging; thin film coating evaluation; polymer delivery devices; solid lubricant coating; polypropylene; poly(vinylpyrrolidone); polyurethane; process monitoring IR transmission imaging; multispectral imaging; thin film coating evaluation; polymer delivery devices; solid lubricant coating; polypropylene; poly(vinylpyrrolidone); polyurethane; process monitoring
Show Figures

Figure 1

MDPI and ACS Style

Walsh, A.; Rebrova, N.; Darby, S.; Barton, K.; Wolfe, R.; Buckley, F.; Lewis, L.; McAuliffe, M. IR Imaging of Solid Lubricant Coatings on Concealed/Disjointed Surfaces for Transparent Polymer Delivery Device Applications. Sensors 2020, 20, 6408. https://doi.org/10.3390/s20226408

AMA Style

Walsh A, Rebrova N, Darby S, Barton K, Wolfe R, Buckley F, Lewis L, McAuliffe M. IR Imaging of Solid Lubricant Coatings on Concealed/Disjointed Surfaces for Transparent Polymer Delivery Device Applications. Sensors. 2020; 20(22):6408. https://doi.org/10.3390/s20226408

Chicago/Turabian Style

Walsh, Anton, Natalia Rebrova, Steven Darby, Killian Barton, Raymond Wolfe, Finbarr Buckley, Liam Lewis, and Michael McAuliffe. 2020. "IR Imaging of Solid Lubricant Coatings on Concealed/Disjointed Surfaces for Transparent Polymer Delivery Device Applications" Sensors 20, no. 22: 6408. https://doi.org/10.3390/s20226408

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop