The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix

The effect of ultraviolet (UV) exposure on the service-life of thermochromic microcapsules integrated into the epoxy matrix was investigated. The microcapsules of the formaldehyde shell contain the core of thermochromic leuco dye. Seven sets of epoxy resin samples filled with concentrations from 0 t...

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Autores principales:	Olga BULDERBERGA, Andrey ANISKEVICH
Formato:	article
Lenguaje:	EN
Publicado:	Kaunas University of Technology 2021
Materias:	thermochromic materials microcapsules ultraviolet degradation epoxy resin Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/0d209b0e97c446a7aa8017de197a3522
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spelling	oai:doaj.org-article:0d209b0e97c446a7aa8017de197a35222021-12-02T06:20:57ZThe Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix1392-13202029-728910.5755/j02.ms.29608https://doaj.org/article/0d209b0e97c446a7aa8017de197a35222021-12-01T00:00:00Zhttps://matsc.ktu.lt/index.php/MatSc/article/view/29608https://doaj.org/toc/1392-1320https://doaj.org/toc/2029-7289The effect of ultraviolet (UV) exposure on the service-life of thermochromic microcapsules integrated into the epoxy matrix was investigated. The microcapsules of the formaldehyde shell contain the core of thermochromic leuco dye. Seven sets of epoxy resin samples filled with concentrations from 0 to 10 wt.% of microcapsules were investigated. The composite samples were exposed to UV for approximately 1000 h. For the quantitative evaluation of colour change under UV, a fast and simple original procedure based on samples’ image treatment was developed. With the exposure time intervals of 50 h, samples were taken out from the UV light chamber to evaluate the exposure effect on their reversible thermochromic ability and mechanical properties. Periodical evaluation of the UV light effect on mechanical properties during the exposure was performed by microhardness tests. Tensile tests of the samples till the fracture were performed every 200 h. The critical time under the exposure of the UV lamp that destroys the reversible thermochromic reaction of the microcapsules was defined as 200 h. At the same time, it has been found that the mechanical properties of the epoxy resin under the same UV source were not strongly affected after 1000 h of irradiance and changed in the frame of ~ 10 %.Olga BULDERBERGAAndrey ANISKEVICHKaunas University of Technologyarticlethermochromic materialsmicrocapsulesultraviolet degradationepoxy resinMining engineering. MetallurgyTN1-997ENMedžiagotyra (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermochromic materials microcapsules ultraviolet degradation epoxy resin Mining engineering. Metallurgy TN1-997
spellingShingle	thermochromic materials microcapsules ultraviolet degradation epoxy resin Mining engineering. Metallurgy TN1-997 Olga BULDERBERGA Andrey ANISKEVICH The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
description	The effect of ultraviolet (UV) exposure on the service-life of thermochromic microcapsules integrated into the epoxy matrix was investigated. The microcapsules of the formaldehyde shell contain the core of thermochromic leuco dye. Seven sets of epoxy resin samples filled with concentrations from 0 to 10 wt.% of microcapsules were investigated. The composite samples were exposed to UV for approximately 1000 h. For the quantitative evaluation of colour change under UV, a fast and simple original procedure based on samples’ image treatment was developed. With the exposure time intervals of 50 h, samples were taken out from the UV light chamber to evaluate the exposure effect on their reversible thermochromic ability and mechanical properties. Periodical evaluation of the UV light effect on mechanical properties during the exposure was performed by microhardness tests. Tensile tests of the samples till the fracture were performed every 200 h. The critical time under the exposure of the UV lamp that destroys the reversible thermochromic reaction of the microcapsules was defined as 200 h. At the same time, it has been found that the mechanical properties of the epoxy resin under the same UV source were not strongly affected after 1000 h of irradiance and changed in the frame of ~ 10 %.
format	article
author	Olga BULDERBERGA Andrey ANISKEVICH
author_facet	Olga BULDERBERGA Andrey ANISKEVICH
author_sort	Olga BULDERBERGA
title	The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
title_short	The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
title_full	The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
title_fullStr	The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
title_full_unstemmed	The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
title_sort	effect of uv exposure on the service-life of thermochromic microcapsules integrated into the epoxy matrix
publisher	Kaunas University of Technology
publishDate	2021
url	https://doaj.org/article/0d209b0e97c446a7aa8017de197a3522
work_keys_str_mv	AT olgabulderberga theeffectofuvexposureontheservicelifeofthermochromicmicrocapsulesintegratedintotheepoxymatrix AT andreyaniskevich theeffectofuvexposureontheservicelifeofthermochromicmicrocapsulesintegratedintotheepoxymatrix AT olgabulderberga effectofuvexposureontheservicelifeofthermochromicmicrocapsulesintegratedintotheepoxymatrix AT andreyaniskevich effectofuvexposureontheservicelifeofthermochromicmicrocapsulesintegratedintotheepoxymatrix
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The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix

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