Aging and Degradation of Printed Materials

Izdebska, Joanna

doi:10.1016/b978-0-323-37468-2.00022-1

Cited by 16 publications

(21 citation statements)

References 40 publications

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“…The level of degradation (breakage) is relevant to the light-energy used. Shorter light-wavelengths do not need oxygen for the hydroperoxide process, while low-wavelength sources need an oxygen environment [ 14 , 15 , 16 , 17 ]. Azo dyes usually degrade under the influence of UV-irradiation, especially when a photocatalytic source of metal oxide is presented.…”

Section: Introductionmentioning

confidence: 99%

New Insight on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on Azobenzene/Graphene Hybrid Additives in Polyethylene Oxide

2020

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In this work, we reported a new insight on the kinetics of photoisomerization and time evolution of hybrid thin films considering the azo-dye methyl red (MR) incorporated with graphene accommodated in polyethylene oxide (PEO). The kinetics of photoisomerization and time-evolution of hybrid thin films were investigated using UV-Vis s and FTIR spectroscopies, as well as appropriate models developed with new analytical methods. The existence of azo-dye MR in the complex is crucial for the resource action of the trans↔cis cycles through UV-illumination ↔ Visible-illumination relaxations. The results of the UV–Vis and the FTIR investigations prove the cyclical trans ↔ cis-states. Consequently, PEO-(MR-Graphene) hybrid composite thin films can be introduced as possible applicants for photochromic molecular switches, light-gated transistors, and molecular solar thermal energy storage media.

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Section: Introductionmentioning

confidence: 99%

New Insight on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on Azobenzene/Graphene Hybrid Additives in Polyethylene Oxide

2020

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“…Basic types of ageing that are classified according to the major ageing factor involved, are thermal ageing, photo ageing, chemical ageing and biological ageing . Often we deal with complex ageing, in which several factors occur simultaneously . The natural process of ageing is very slow.…”

Section: Introductionmentioning

confidence: 99%

“…Light fastness has to be determined solely on full tone area prints. Additionally, objective colour measurements are commonly used to determine the change from the original colour value (determined mainly using colour coordinates L *, a *, b * and the calculation of total colour change,

Δ E_{a b}^{*}

) and to assess the degree of changes .…”

Section: Introductionmentioning

confidence: 99%

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Improvement of light fastness of water‐based printing inks with addition of glycerol derivative containing thiol groups

Izdebska‐Podsiadły

Żołek‐Tryznowska

Annusik

et al. 2017

Coloration Technology

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The aim of this work was to study the influence of a glycerol derivative with thiol groups, 3,6‐dithia‐1,8‐octanediol (DTO), on light fastness of prints overprinted with water‐based flexographic printing inks. Laboratory printing was performed on various plastic films (BOPP and PE). The effect of a small amount of DTO on printing ink colour was examined by studying the optical density of a full tone area, relative printing contrast and the colour values (CIELAB), and the total colour difference, ΔEab∗. Artificial ageing was applied in order to investigate DTO influence on colourfastness of CMY printing inks. Densitometry and spectrophotometric parameters were measured during artificial ageing by irradiation. Additionally, FTIR spectroscopy was used to observe the changes in ink film on printing bases before and after ageing. The print quality of investigated prints is widely discussed. In general, DTO addition influenced the printability of the plastic film and the optical density of a full tone area with an acceptable total colour difference ΔEab∗. Furthermore, printing inks with added DTO exhibited higher optical density and smaller changes of ΔEab∗ during artificial ageing. Moreover, the FTIR spectra of printing ink films with added DTO after ageing did not exhibit any perceptible changes in contrast with the original printing ink.

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“…A decomposição térmica, principal mecanismo de destruição dos contaminantes, pode ocorrer a partir da degradação oxidativa, na presença de oxigênio (GOGLEV & NEIMAN 1968, IZDEBSKA 2016. Na degradação térmica oxidativa, as moléculas e ligações químicas dos compostos são destruídas através da ação de radicais livres, formados a partir da interação do oxigênio com o calor gerado pelas altas temperaturas (IZDEBSKA 2016, CRAWFORD & QUINN 2017. A decomposição térmica também pode acontecer por meio da pirólise, que difere da degradação térmica oxidativa por ocorrer sem a presença de oxigênio, em uma atmosfera inerte (BARIK 2019, RUAN et al 2019.…”

Section: Mecanismos De Remoção Dos Contaminantes Pela Temperaturaunclassified

Princípios e aplicações de processos térmicos para remediação de áreas contaminadas

Leite¹,

Shinzato²,

Freitas³

2020

Rev. Inst. Geol.

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Processos térmicos têm sido cada vez mais aplicados mundialmente para a remediação de áreas contaminadas. O tratamento térmico, in situ ou ex situ, baseia-se na elevação da temperatura do solo e da água subterrânea visando a degradação do contaminante ou a sua transferência para a fase vapor, facilitando sua extração. Existem diversas formas de aquecimento, sendo a condução de calor, o aquecimento por resistência elétrica e a injeção de vapor os métodos mais utilizados. A remediação térmica pode ser utilizada em áreas com concentrações elevadas de contaminantes dissolvidos e até mesmo em fase separada (NAPLs), além de ser aplicável em diferentes litologias. Apesar do seu potencial de utilização, no Brasil essa técnica ainda é pouco estudada e aplicada. Dessa forma, o presente trabalho apresenta uma análise das diversas técnicas de remediação por processos térmicos, suas aplicações, vantagens e desvantagens, assim como um panorama de sua utilização em nível nacional.

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Aging and Degradation of Printed Materials

Cited by 16 publications

References 40 publications

New Insight on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on Azobenzene/Graphene Hybrid Additives in Polyethylene Oxide

New Insight on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on Azobenzene/Graphene Hybrid Additives in Polyethylene Oxide

Improvement of light fastness of water‐based printing inks with addition of glycerol derivative containing thiol groups

Princípios e aplicações de processos térmicos para remediação de áreas contaminadas

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