Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System

Solar cells are important alternatives to fossil fuels for energy generation in today’s world, where the demand for alternative, renewable sources of energy is increasing. However, solar cells, which are installed outdoors, are susceptible to pollution by environmental factors. A solution to overcom...

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Autores principales:	Seongyong Kim, Minho Jo, Jongsu Lee, Changwoo Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	contact angle roll-to-roll slot-die coating transmittance water-repellent coating Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/b55382fc5d1e495eaa8b1d4ba7ef09ca
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spelling	oai:doaj.org-article:b55382fc5d1e495eaa8b1d4ba7ef09ca2021-11-25T18:49:16ZTransmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System10.3390/polym132240032073-4360https://doaj.org/article/b55382fc5d1e495eaa8b1d4ba7ef09ca2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4003https://doaj.org/toc/2073-4360Solar cells are important alternatives to fossil fuels for energy generation in today’s world, where the demand for alternative, renewable sources of energy is increasing. However, solar cells, which are installed outdoors, are susceptible to pollution by environmental factors. A solution to overcome this limitation involves coating solar cell surfaces with functional coatings. In this study, we propose a transmittance control method for a tensioned web in a roll-to-roll, transparent, water-repellent film coating. First, we analyzed the effects of process conditions on the transmittance and contact angle of the transparent water-repellent film during roll-to-roll slot-die coating. It was confirmed that the tension was the most dominant factor, followed by the coating gap. Through the tension control, the transmittance was changed by 3.27%, and the contact angle of the DI water was changed by 17.7°. In addition, it was confirmed that the transmittance was changed by 0.8% and the contact angle of DI water by 3.9° via the coating gap control. Based on these results, a transmittance prediction model was developed according to the tension and coating gap, and was then verified experimentally. Finally, a water-repellent film with a high transmittance of 89.77% was obtained using this model.Seongyong KimMinho JoJongsu LeeChangwoo LeeMDPI AGarticlecontact angleroll-to-rollslot-die coatingtransmittancewater-repellent coatingOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4003, p 4003 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	contact angle roll-to-roll slot-die coating transmittance water-repellent coating Organic chemistry QD241-441
spellingShingle	contact angle roll-to-roll slot-die coating transmittance water-repellent coating Organic chemistry QD241-441 Seongyong Kim Minho Jo Jongsu Lee Changwoo Lee Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
description	Solar cells are important alternatives to fossil fuels for energy generation in today’s world, where the demand for alternative, renewable sources of energy is increasing. However, solar cells, which are installed outdoors, are susceptible to pollution by environmental factors. A solution to overcome this limitation involves coating solar cell surfaces with functional coatings. In this study, we propose a transmittance control method for a tensioned web in a roll-to-roll, transparent, water-repellent film coating. First, we analyzed the effects of process conditions on the transmittance and contact angle of the transparent water-repellent film during roll-to-roll slot-die coating. It was confirmed that the tension was the most dominant factor, followed by the coating gap. Through the tension control, the transmittance was changed by 3.27%, and the contact angle of the DI water was changed by 17.7°. In addition, it was confirmed that the transmittance was changed by 0.8% and the contact angle of DI water by 3.9° via the coating gap control. Based on these results, a transmittance prediction model was developed according to the tension and coating gap, and was then verified experimentally. Finally, a water-repellent film with a high transmittance of 89.77% was obtained using this model.
format	article
author	Seongyong Kim Minho Jo Jongsu Lee Changwoo Lee
author_facet	Seongyong Kim Minho Jo Jongsu Lee Changwoo Lee
author_sort	Seongyong Kim
title	Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
title_short	Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
title_full	Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
title_fullStr	Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
title_full_unstemmed	Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System
title_sort	transmittance control of a water-repellent-coated layer on a tensioned web in a roll-to-roll slot-die coating system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b55382fc5d1e495eaa8b1d4ba7ef09ca
work_keys_str_mv	AT seongyongkim transmittancecontrolofawaterrepellentcoatedlayeronatensionedwebinarolltorollslotdiecoatingsystem AT minhojo transmittancecontrolofawaterrepellentcoatedlayeronatensionedwebinarolltorollslotdiecoatingsystem AT jongsulee transmittancecontrolofawaterrepellentcoatedlayeronatensionedwebinarolltorollslotdiecoatingsystem AT changwoolee transmittancecontrolofawaterrepellentcoatedlayeronatensionedwebinarolltorollslotdiecoatingsystem
_version_	1718410670363377664

Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System

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