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Polymers
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Polymers in Roll to Roll Processes
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Polymers in Roll to Roll Processes

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Processing and Engineering".

Deadline for manuscript submissions: closed (15 November 2023) | Viewed by 6626

Special Issue Editors

Prof. Dr. Changwoo Lee

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Konkuk University, Seoul, Republic of Korea
Interests: roll-to-roll printed electronics; web handling technology; machine-learning-based prognostic systems; smart data; smart factory
Special Issues, Collections and Topics in MDPI journals
Dr. Jongsu Lee

E-Mail Website
Guest Editor
Department of Advanced Components and Materials Engineering, Sunchon National University, Suncheon-si, Republic of Korea
Interests: roll to roll process; coating; web handling; mechatronics; system dynamics modeling; control and instrumentation; control theory; systems dynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Flexible and wearable electronics have been considered the next paradigm following the printed circuit board (PCB)-based electronics. In the next generation of electronics, polymer-based materials can be used for various purposes, including the substrate of thin film transistors, perovskite-based photovoltaics, bio-chip, and the functional layers of flexible and wearable electronics. Especially in the roll-to-roll processes, interdisciplinarity on the material synthesis, ink composition and rheology on coating, and dynamic of the polymer-based substrate is required to achieve the mass production of highly integrated flexible and wearable electronics. This Special Issue aims to bring together the latest and innovative advances in polymer-based material synthesis, ink composition and rheology on coating, and applications in flexible and wearable electronics.

Topics for this Special Issue cover, but are not limited to, the following topics:

  • Synthesis of polymer-based materials;
  • Flexible electronics;
  • Wearable electronics;
  • Bioelectronics and biosensors;
  • Ink rheology on coating;
  • Roll-to-Roll manufacturing;
  • Artificial intelligence in roll to roll manufacturing.

Prof. Dr. Changwoo Lee
Dr. Jongsu Lee
Guest Editors

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. Polymers 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 2700 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

  • polymer-based materials
  • ink rheology on coating
  • roll-to-roll manufacturing
  • flexible electronics
  • wearable electronics
  • artificial intelligence

Published Papers (4 papers)

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Research

13 pages, 2308 KiB  
Article
Roll-to-Roll Gravure Coating of PVDF on a Battery Separator for the Enhancement of Thermal Stability
by Gyuyoung Kim, Jin-Hee Noh, Horim Lee, Jaehak Shin and Dongjin Lee
Polymers 2023, 15(20), 4108; https://doi.org/10.3390/polym15204108 - 16 Oct 2023
Cited by 1 | Viewed by 1508
Abstract
The polyethylene lithium-ion battery separator is coated with a polymer by means of a roll-to-roll (R2R) gravure coating scheme to enhance the thermal stability. The polyvinylidene fluoride (PVDF) or polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) is gravure-coated, and the pores are fabricated based on online nonsolvent-induced [...] Read more.
The polyethylene lithium-ion battery separator is coated with a polymer by means of a roll-to-roll (R2R) gravure coating scheme to enhance the thermal stability. The polyvinylidene fluoride (PVDF) or polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) is gravure-coated, and the pores are fabricated based on online nonsolvent-induced phase separation (NIPS). N-methylpyrrolidone is used as a solvent, and deionized water or a methanol mixture thereof is exploited as a nonsolvent in NIPS. Scanning electron microscopy confirms that the polymer film is formed and that the pores are well developed. The thermal shrinkage decreased by 20.0% and 23.2% compared to that of the bare separator due to the coating of PVDF and PVDF-HFP, respectively. The R2R gravure coating scheme is proven to be fully functional to tailor the properties of lithium-ion battery separators. Full article
(This article belongs to the Special Issue Polymers in Roll to Roll Processes)
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20 pages, 6063 KiB  
Article
Multi-Geometry Parameters Optimization of Large-Area Roll-to-Roll Nanoimprint Module Using Grey Relational Analysis and Artificial Neural Network
by Truong Sinh Nguyen, Anton Nailevich Gafurov, Jeongdai Jo, Taik-Min Lee, Seung-Hyun Lee and Kyunghoon Kim
Polymers 2023, 15(13), 2909; https://doi.org/10.3390/polym15132909 - 30 Jun 2023
Viewed by 1050
Abstract
Micro- and nanofabrication on polymer substrate is integral to the development of flexible electronic devices, including touch screens, transparent conductive electrodes, organic photovoltaics, batteries, and wearable devices. The demand for flexible and wearable devices has spurred interest in large-area, high-throughput production methods. Roll-to-roll [...] Read more.
Micro- and nanofabrication on polymer substrate is integral to the development of flexible electronic devices, including touch screens, transparent conductive electrodes, organic photovoltaics, batteries, and wearable devices. The demand for flexible and wearable devices has spurred interest in large-area, high-throughput production methods. Roll-to-roll (R2R) nanoimprint lithography (NIL) is a promising technique for producing nano-scale patterns rapidly and continuously. However, bending in a large-scale R2R system can result in non-uniform force distribution during the imprinting process, which reduces pattern quality. This study investigates the effects of R2R imprinting module geometry parameters on force distribution via simulation, using grey relational analysis to identify optimal parameter levels and ANOVA to determine the percentage of each parameter contribution. The study also investigates the length and force ratio on a backup roller used for bending compensation. The simulation results and the artificial neural network (ANN) model enable the prediction of nip pressure and force distribution non-uniformity along the roller, allowing the selection of the optimal roller geometry and force ratio for minimal non-uniformity on a specific R2R system. An experiment was conducted to validate the simulation results and ANN model. Full article
(This article belongs to the Special Issue Polymers in Roll to Roll Processes)
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15 pages, 6051 KiB  
Article
Hybrid Device Fabrication Using Roll-to-Roll Printing for Personal Environmental Monitoring
by Thanh Huy Phung, Anton Nailevich Gafurov, Inyoung Kim, Sung Yong Kim, Kyoung Min Kim and Taik-Min Lee
Polymers 2023, 15(12), 2687; https://doi.org/10.3390/polym15122687 - 15 Jun 2023
Cited by 4 | Viewed by 1442
Abstract
Roll-to-roll (R2R) printing methods are well known as additive, cost-effective, and ecologically friendly mass-production methods for processing functional materials and fabricating devices. However, implementing R2R printing to fabricate sophisticated devices is challenging because of the efficiency of material processing, the alignment, and the [...] Read more.
Roll-to-roll (R2R) printing methods are well known as additive, cost-effective, and ecologically friendly mass-production methods for processing functional materials and fabricating devices. However, implementing R2R printing to fabricate sophisticated devices is challenging because of the efficiency of material processing, the alignment, and the vulnerability of the polymeric substrate during printing. Therefore, this study proposes the fabrication process of a hybrid device to solve the problems. The device was created so that four layers, composed of polymer insulating layers and conductive circuit layers, are entirely screen-printed layer by layer onto a roll of polyethylene terephthalate (PET) film to produce the circuit. Registration control methods were presented to deal with the PET substrate during printing, and then solid-state components and sensors were assembled and soldered to the printed circuits of the completed devices. In this way, the quality of the devices could be ensured, and the devices could be massively used for specific purposes. Specifically, a hybrid device for personal environmental monitoring was fabricated in this study. The importance of environmental challenges to human welfare and sustainable development is growing. As a result, environmental monitoring is essential to protect public health and serve as a basis for policymaking. In addition to the fabrication of the monitoring devices, a whole monitoring system was also developed to collect and process the data. Here, the monitored data from the fabricated device were personally collected via a mobile phone and uploaded to a cloud server for additional processing. The information could then be utilized for local or global monitoring purposes, moving one step toward creating tools for big data analysis and forecasting. The successful deployment of this system could be a foundation for creating and developing systems for other prospective uses. Full article
(This article belongs to the Special Issue Polymers in Roll to Roll Processes)
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14 pages, 10760 KiB  
Article
Layer-by-Layer Engineered Flexible Functional Film Fabrication with Spreadability Control in Roll-to-Roll Manufacturing
by Hojin Jeon, Jaehyun Noh, Minho Jo, Changbeom Joo, Jeongdai Jo and Changwoo Lee
Polymers 2023, 15(11), 2478; https://doi.org/10.3390/polym15112478 - 27 May 2023
Cited by 2 | Viewed by 1644
Abstract
A roll-to-roll manufacturing system performs printing and coating on webs to mass-produce large-area functional films. The functional film of a multilayered structure is composed of layers with different components for performance improvement. The roll-to-roll system is capable of controlling the geometries of the [...] Read more.
A roll-to-roll manufacturing system performs printing and coating on webs to mass-produce large-area functional films. The functional film of a multilayered structure is composed of layers with different components for performance improvement. The roll-to-roll system is capable of controlling the geometries of the coating and printing layers using process variables. However, research on geometric control using process variables is limited to single-layer structures only. This study entails the development of a method to proactively control the geometry of the upper coated layer by using the lower-layer coating process variable in the manufacture of a double-coated layer. The correlation between the lower-layer coating process variable and upper coated layer geometry was examined by analyzing the lower-layer surface roughness and spreadability of the upper-layer coating ink. The correlation analysis results demonstrate that tension was the dominant variable in the upper coated layer surface roughness. Additionally, this study found that adjusting the process variable of the lower-layer coating in a double-layered coating process could improve the surface roughness of the upper coating layer by up to 14.9%. Full article
(This article belongs to the Special Issue Polymers in Roll to Roll Processes)
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