Review of autoxidation and driers

Soucek, Mark D.; Khattab, Tawfik A.; Wu, Jian‐Zhong

doi:10.1016/j.porgcoat.2011.08.021

Cited by 150 publications

(150 citation statements)

References 127 publications

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“…23 A 0.5 mm layer of ZnUFA was le to cure in air at room temperature for up to seven months. In that time, the nC]CH band at 3008 cm À1 decreased and a broad -OH band appeared around 3400 cm À1 .…”

Section: Zinc Soaps Of Varying Compositionmentioning

confidence: 99%

An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings

Hermans

Keune

Loon

et al. 2015

J. Anal. At. Spectrom.

124

141

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An infrared spectroscopic study of the nature of zinc carboxylates in oil paintingsHermans, J.J.; Keune, K.; van Loon, A.; Iedema, P.D. Published in:Journal of analytical atomic spectrometry DOI:10.1039/c5ja00120jLink to publication Citation for published version (APA):Hermans, J. J., Keune, K., van Loon, A., & Iedema, P. D. (2015). An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings. Journal of analytical atomic spectrometry, 30(7), 1600-1608. DOI: 10.1039/c5ja00120j General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 12 May 2018An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings † Joen J. Hermans, * Katrien Keune, Annelies van Loon and Piet D. IedemaThe formation of metal soaps is a major problem for oil paintings conservators. The complexes of either lead or zinc and fatty acids are the product of reactions between common pigments and the oil binder, and they are associated with many types of degradation that affect the appearance and stability of oil paint layers.Fourier transform infrared spectroscopy (FTIR) reveals that a paint sample from The Woodcutter (after Millet) by Vincent van Gogh contains two distinct zinc carboxylate species, one similar to crystalline zinc palmitate and one that is characterized by a broadened asymmetric stretch COO À band shifted to 1570-1590 cm À1 . This observation has been made in many paintings. Although several hypotheses exist to explain the shifted broad carboxylate band, these were not supported by experimental evidence. In this paper, experiments were carried out to characterize the second zinc carboxylate type. It is shown that neither variations in the composition of zinc soaps (i.e. zinc soaps containing mixtures of fatty acids or metals) nor fatty acids adsorbed on pigment surfaces are responsible for the second zinc carboxylate species. X-Ray diffraction (XRD) and FTIR analysis indicate that the broad COO À band represents amorphous zinc carboxylates. These species can be interpreted as either non-crystalline zinc soaps or zinc ions bound to carboxylate moieties on the polymerized oil network, a system similar to ionomers.These findings uncover an intermediate stage of metal soap-related degradation of oil paintings, and lead the way to impr...

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Section: Zinc Soaps Of Varying Compositionmentioning

confidence: 99%

An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings

Hermans

Keune

Loon

et al. 2015

J. Anal. At. Spectrom.

124

141

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“…Indeed, this process is called oxidative curing or drying, and many studies about this subject have been carried out or supported by coating industries. 1 Alkyd resins exhibit excellent performance properties that make them one of the most employed materials obtained from a renewable source in the coatings industry. [2][3][4] Unsaturated substrates, such as vegetable oils and their derivatives, can undertake a process known as oxidative polymerization.…”

Section: Introductionmentioning

confidence: 99%

“…This process is accompanied by the formation of volatile compounds, such as aldehydes or alcohols. [1][2][3][4][5] The oxidative polymerization of unsaturated oils can occur without the use of catalyst, however, under this condition, this process is too slow for industrial and practical applications. Indeed, depending on the application, the oxidative polymerization reaction need to be more or less rapid, and this is the reason that different catalytic systems have been developed.…”

Section: Introductionmentioning

confidence: 99%

“…These catalytic systems use to be well dissolved or dispersed in the oily matrix and functions as a deactivator of natural antioxidants, diminishing the induction period and accelerating oxygen absorption and peroxide formation. [1][2][3][4][5] Cobalt carboxylate-based complexes are an important group of driers, but due to the carcinogenic effects of cobalt, 1,4 they are progressively been substituted. In this context, manganese-based driers are considered a good alternative to overcome the cobalt-based analogues in numerous applications, however, most of the manganesebased driers are less active.…”

Section: Introductionmentioning

confidence: 99%

“…1,6,7 One strategy to raise the catalytic performance of these catalytic systems is based on a modification of their coordination sphere, employing nitrogen ligands, since their ability to modify the steric and electronic properties can be used to change the behavior of the complexes for oxidative polymerization and to improve the compatibility of the driers in the reaction system. 1,[6][7][8][9][10][11] In former work, it was observed that the addition of nitrogen ligands in situ improved the reaction rate of the oxidative polymerization, in the presence of classical catalysts. 10 In order to extend the alternatives, in this work is established the influence of diverse nitrogen ligands on the catalytic performances of metal carboxylates in oxidative polymerization processes.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Lima¹,

Nunes²,

Dantas³

et al. 2017

J. Braz. Chem. Soc.

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The oxidative polymerization of linseed oil was investigated comparing the classical catalysts cobalt(II) 2-ethylhexanoate and manganese(II) 2-ethylhexanoate and their derivatives modified by the presence of chelating nitrogen ligands, i.e., 2,2'-bipyridyl, 2-(acetyl-2,6-diisopropylphenylimine)-pyridine and [N-(2,6-diisopropylphenyl)imine]acenaphthoquinone. The suitable stoichiometries between the two precursor complexes with the three ligands were determined by UV-visible spectroscopy. All complexes were characterized by infrared spectroscopy, and one complex was characterized also by X-ray diffraction. The apparent kinetic constants of oxidative polymerization of linseed oil was determined, for each catalytic system, via the periodic measurements of the oil viscosity during the oxidation reaction. The results indicated that the modifications of the classical two complexes with the chelating nitrogen ligands improved the catalytic efficiency at least to the manganese complex.

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Wood, Surface Treatment

Grüll¹,

Hansemann²

2023

Ullmann's Encyclopedia of Industrial Chemistry

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Review of autoxidation and driers

Cited by 150 publications

References 127 publications

An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings

An infrared spectroscopic study of the nature of zinc carboxylates in oil paintings

Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Wood, Surface Treatment

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