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Advanced Flexible Materials for Printed Electronics

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 6663

Special Issue Editor


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Guest Editor
Universiteit Hasselt, Institute for Materials Research (IMO-IMOMEC), Wetenschapspark 1, B-3590 Diepenbeek, Belgium
Interests: materials for printed electronics; flexible and stretchable materials and materials for functional coatings

Special Issue Information

Dear colleagues,

Printed Electronics is one of the fastest growing fields, and through scientific and technology advancements, it is being applied in healthcare, automotive, retail, and smart packaging, among others. Currently, a huge research effort is being undertaken to allow smart devices to be printed onto flexible, bendable, and even stretchable substrates.

To further this area of research, investigation in three important aspects of Printed Electronics is required: ink formulation, printing technology and interaction of the inks with the substrates. Printing on flexible substrates such as foils, paper, textiles, and other fiber-based substrates requires proper understanding of the interaction between the ink formulation and these substrates. Both the flow behaviour and wetting on the substrate of choice and the absorption into the substrate need to be addressed. Further, most of these flexible and stretchable carriers are heat-sensitive, and thus both printing technology and post-processing should be adapted to achieve functional designs.

This Special Issue aims to publish a collection of the latest research on the use of advanced functional materials for ink formulation, the deposition of these new materials with state-of-the-art printing technology, and the understanding of their interactions with a wide variety of substrates.

It is my pleasure to invite researchers on Printed Electronics to submit related manuscripts to this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Wim Deferme
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • inkjet printing
  • screen printing
  • roll-to-roll printing
  • flexible substrates
  • stretchability
  • ink formulation
  • ink-substrate interaction
  • rheologic ink parameters

Published Papers (3 papers)

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Research

16 pages, 4359 KiB  
Article
Printed Nanocarbon Heaters for Stretchable Sport and Leisure Garments
by Andrew Claypole, James Claypole, Neil Bezodis, Liam Kilduff, David Gethin and Tim Claypole
Materials 2022, 15(2), 573; https://doi.org/10.3390/ma15020573 - 13 Jan 2022
Cited by 4 | Viewed by 2148
Abstract
The ability to maintain body temperature has been shown to bring about improvements in sporting performance. However, current solutions are limited with regards to flexibility, heating uniformity and robustness. An innovative screen-printed Nanocarbon heater is demonstrated which is robust to bending, folding, tensile [...] Read more.
The ability to maintain body temperature has been shown to bring about improvements in sporting performance. However, current solutions are limited with regards to flexibility, heating uniformity and robustness. An innovative screen-printed Nanocarbon heater is demonstrated which is robust to bending, folding, tensile extensions of up to 20% and machine washing. This combination of ink and substrate enables the heated garments to safely flex without impeding the wearer. It is capable of producing uniform heating over a 15 × 4 cm area using a conductive ink based on a blend of Graphite Nanoplatelets and Carbon Black. This can be attributed to the low roughness of the conductive carbon coating, the uniform distribution and good interconnection of the carbon particles. The heaters have a low thermal inertia, producing a rapid temperature response at low voltages, reaching equilibrium temperatures within 120 s of being switched on. The heaters reached the 40 °C required for wearable heating applications within 20 s at 12 Volts. Screen printing was demonstrated to be an effective method of controlling the printed layer thickness with good interlayer adhesion and contact for multiple printed layers. This can be used to regulate their electrical properties and hence adjust the heater performance. Full article
(This article belongs to the Special Issue Advanced Flexible Materials for Printed Electronics)
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11 pages, 2384 KiB  
Article
Temperature-Sensing Inks Using Electrohydrodynamic Inkjet Printing Technology
by Ju-Hun Ahn, Hee-Ju Hong and Chang-Yull Lee
Materials 2021, 14(19), 5623; https://doi.org/10.3390/ma14195623 - 27 Sep 2021
Cited by 11 | Viewed by 2343
Abstract
Temperature measurement is very important for thermal control, which is required for the advancement of mechanical and electronic devices. However, current temperature sensors are limited by their inability to measure curved surfaces. To overcome this problem, several methods for printing flexible substrates were [...] Read more.
Temperature measurement is very important for thermal control, which is required for the advancement of mechanical and electronic devices. However, current temperature sensors are limited by their inability to measure curved surfaces. To overcome this problem, several methods for printing flexible substrates were proposed. Among them, electrohydrodynamic (EHD) inkjet printing technology was adopted because it has the highest resolution. Since EHD inkjet printing technology is limited by the type of ink used, an ink with temperature-sensing properties was manufactured for use in this printer. To confirm the applicability of the prepared ink, its resistance characteristics were investigated, and the arrangement and characteristics of the particles were observed. Then, the ink was printed using the EHD inkjet approach. In addition, studies of the meniscus shapes and line widths of the printed results under various conditions confirmed the applicability of the ink to the EHD inkjet printing technology and the change in its resistance with temperature. Full article
(This article belongs to the Special Issue Advanced Flexible Materials for Printed Electronics)
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19 pages, 5745 KiB  
Article
Screen Printed Antennas on Fiber-Based Substrates for Sustainable HF RFID Assisted E-Fulfilment Smart Packaging
by Jarne Machiels, Raf Appeltans, Dieter Klaus Bauer, Elien Segers, Zander Henckens, Wouter Van Rompaey, Dimitri Adons, Roos Peeters, Marie Geiβler, Katrin Kuehnoel, Lydia Tempel, Thomas Weissbach, Arved Carl Hübler, Akash Verma, Eleonora Ferraris, Wim Deferme and Mieke Buntinx
Materials 2021, 14(19), 5500; https://doi.org/10.3390/ma14195500 - 23 Sep 2021
Cited by 19 | Viewed by 3634
Abstract
Intelligent packaging is an emerging technology, aiming to improve the standard communication function of packaging. Radio frequency identification (RFID) assisted smart packaging is of high interest, but the uptake is limited as the market needs cost-efficient and sustainable applications. The integration of screen [...] Read more.
Intelligent packaging is an emerging technology, aiming to improve the standard communication function of packaging. Radio frequency identification (RFID) assisted smart packaging is of high interest, but the uptake is limited as the market needs cost-efficient and sustainable applications. The integration of screen printed antennas and RFID chips as smart labels in reusable cardboard packaging could offer a solution. Although paper is an interesting and recyclable material, printing on this substrate is challenging as the ink conductivity is highly influenced by the paper properties. In this study, the best paper/functional silver ink combinations were first selected out of 76 paper substrates based on the paper surface roughness, air permeance, sheet resistance and SEM characterization. Next, a flexible high frequency RFID chip (13.56 MHz) was connected on top of screen printed antennas with a conductive adhesive. Functional RFID labels were integrated in cardboard packaging and its potential application as reusable smart box for third party logistics was tested. In parallel, a web-based software application mimicking its functional abilities in the logistic cycle was developed. This multidisciplinary approach to developing an easy-scalable screen printed antenna and RFID-assisted smart packaging application is a good example for future implementation of hybrid electronics in sustainable smart packaging. Full article
(This article belongs to the Special Issue Advanced Flexible Materials for Printed Electronics)
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