Epoxy-silica polymers as stone conservation materials

Cardiano, Paola; Ponterio, Rosina Celeste; Sergi, Santo; Schiavo, Sandra Lo; Piraino, Pasquale

doi:10.1016/j.polymer.2005.01.002

Cited by 67 publications

(32 citation statements)

References 19 publications

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“…Para evitar este deterioro, se han desarrollado un gran número de compuestos cuya finalidad es recubrir la fachada y protegerla de dichos agentes nocivos (3,(8)(9)(10)(11)(12).…”

Section: Introductionunclassified

Tratamientos de protección superficial de materiales de construcción por nuevos materiales híbridos organo-inorgánicos multifuncionales

Oteo¹,

Elvira²,

Alonso³

et al. 2006

Bol. Soc. Esp. Ceram. Vidr.

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En este trabajo se presentan los resultados de las investigaciones llevadas a cabo para evaluar el comportamiento de un material híbrido orgánico-inorgánico (HOI) como recubrimiento protector de distintos materiales de construcción. La caracterización mineralógica, estructural y textural de los materiales de construcción estudiados (granito, mármol y arenisca) se llevó a cabo mediante las técnicas: difracción de rayos X (DRX), microscopía electrónica de barrido (MEB), reflectancia total atenuada (ATR) y porosimetría de mercurio. Por otro lado, la caracterización del recubrimiento antivandálico se llevó a cabo mediante ATR y MEB, evaluando su capacidad protectora contra pinturas realizadas por aerógrafo o rotulador, según la mayor o menor facilidad con que se elimina la pintura por limpieza con gamuza. La estabilidad del recubrimiento en el material inorgánico se estudió mediante ensayos acelerados de resistencia a la lluvia y, en el caso del mármol, a la radiación UV. La variación del color experimentada por la superficie después de ser recubierta se estudió, en todos los casos, por colorimetría. Palabras clave: antivandálico, híbrido, recubrimiento, envejecimiento. Surface protection treatments of building materials by new organic-inorganic hybrid multifuncional materialsThe behavior of an organic-inorganic hybrid material (HOI) as protective coating of different building materials has been evaluated in this work. The mineralogical, structural and textural characterization of the inorganic building materials (granite, marble and sandstone) was carried out by: x-ray diffraction (XRD), scanning electron microscopy (SEM), attenuated total reflectance (ATR) and mercury porosimetry. On the other hand, the protective coating was characterized by ATR and SEM, evaluating its protective capacity against paintings made by aerograph or labeller, according to the greater or smaller facility whereupon eliminates the painting by means of cleaning with a cloth. The stability of the coating on the inorganic materials was studied by accelerated tests of rain and UV radiation. Color variation after coating was studied, in all the cases, by colorimetry.

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“…Para evitar este deterioro, se han desarrollado un gran número de compuestos cuya finalidad es recubrir la fachada y protegerla de dichos agentes nocivos (3,(8)(9)(10)(11)(12).…”

Section: Introductionunclassified

Tratamientos de protección superficial de materiales de construcción por nuevos materiales híbridos organo-inorgánicos multifuncionales

Oteo¹,

Elvira²,

Alonso³

et al. 2006

Bol. Soc. Esp. Ceram. Vidr.

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“…Poly(bisphenolA-co-epichlorohydrin), glycidyl endcapped (DGEBA) (Average M n 5 348 corresponding to an average degree of polymerization of 0.03; epoxy equivalent 5 174), (3-glycidyloxypropyl)trimethoxysilane (GLYTS), 3-aminopropyl-methyldiethoxysilane (AMTS), glycidyl-2,2, 3,3,4,4,5,5,6,6,7,7,8,8,9, 9-hexadecafluorononyl ether (GLY16F), and 3,3,3-trifluoropropyl-trimethoxysilane (TFP-TMS) were purchased from SigmaAldrich and used as received. 13 C NMR spectra have been performed in CDCl 3 by means of a Bruker AMX R-300 spectrometer operating at 300.13 and 75.47 MHz, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…2,3 Since these products are featured by some disadvantages, we turned our attention to the synthesis of epoxy-silica hybrids to be employed in stone coating. [4][5][6] Epoxy resins cured with aliphatic amines are extensively used as protective coatings for several applications 7 even though, in stone conservation, they do not match some fundamental requirements such as photostability or mechanical properties. The insertion of inorganic domains inside the organic network by means of a long-chain alkoxy-silane functionalized amine leads to a substantial modification of their chemical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…The extent of epoxy cleavage during the hardening reaction and the hydrolysis of the Si(OR) x groups have been followed by 13 C NMR spectroscopy in solution; the solids have been characterized by means of Raman, FTIR, and TG-DTA studies. The hydrophobic properties of the resulting solids have been investigated by contact angle measurements on coated glass slides, and have been tailored by adding to the above mixtures two fluorine-containing comonomers, namely glycidyl-2,2, 3,3,4,4,5,5,6,6,7,7,8,8,9,3,. Preliminary tests to evaluate the efficacy of the above products, as construction materials coatings, have been carried out by means of mercury intrusion porosimetry and water absorption by the wicking method.…”

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confidence: 99%

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Hydrophobic properties of new epoxy‐silica hybrids

Cardiano

2008

J of Applied Polymer Sci

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New products to be employed as coatings for construction materials have been synthesized. Room temperature blending of poly(bisphenolA-co-epichlorohydrin), glycidyl endcapped (DGEBA) and 3-aminopropyl-methyldiethoxysilane (AMTS), as well as of DGEBA, (3-glycidyloxypropyl)trimethoxysilane (GLYTS) and AMTS, in CHCl 3 , employing different stoichiometric ratios, leads to transparent and crack free solids. The extent of epoxy cleavage during the hardening reaction and the hydrolysis of the Si(OR) x groups have been followed by 13 C NMR spectroscopy in solution; the solids have been characterized by means of Raman, FTIR, and TG-DTA studies. The hydrophobic properties of the resulting solids have been investigated by contact angle measurements on coated glass slides, and have been tailored by adding to the above mixtures two fluorine-containing comonomers, namely glycidyl-2,2, 3,3,4,4,5,5,6,6,7,7,8,8,9,3,. Preliminary tests to evaluate the efficacy of the above products, as construction materials coatings, have been carried out by means of mercury intrusion porosimetry and water absorption by the wicking method.

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“…For building materials such as lime stone, the acidic dissolution of the carbonate material is principal mechanism of chemical weathering (Ngoic Lan, Nishimura, Tsujino, & Phuong, 2005;Xu, Li, Chen, & Gao, 2010). Many classes of polymeric materials were developed in order to reduce or delay weathering effects on historical stone materials such as acrylics and methacrylate, alkoxysilanes, silicones and epoxies (Cardiano, Ponterio, Schiavo, & Piraino, 2005;Khallaf, El-Midany, & El-Mofty, 2011;Morote-Martinez, PascualSánchez, & Martinez, 2008;Zielecka & Bujnowska, 2005). Although, the using of these polymeric compounds have proved to be efficient in some case studies, such as granular disintegration, whereas the conservation of historical limestone is still challenging,.…”

Section: Introductionmentioning

confidence: 99%

Silane/Siloxane Surface Treatment for Cohesion Ability and Strengthening Agent of Historical Stone

Ershad‐Langroudi

Fadaii²,

Ahmadi³

2017

r Cons Sci J

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Ir Cons Sci J 2017; 1(1): [23][24][25][26][27][28][29][30][31] Silane/siloxane surface treatment are proposed as potential polymeric materials for protective and consolidation coatings of limestone substrates. The silane and silioxane coatings are widely used to strengthen and waterproof of historical monuments. Historical stones are very fragile because of bearing many years in sever weathering conditions. Strengthening historical stones requires paying attention to surface treatment by the aim of decreasing humidity and improvement of mechanical properties. Toward this end, the consolidation coatings using silane and siloxane resins can improve the mechanical properties of historical stones against weathering condition. In this study, two types of coatings based on mixed of silane/siloxane as potential coatings to consolidate historical stones were proposed and the mechanical results were compared with uncoated stones. The mechanical tests approved the silane and siloxane resins can be considered as a proper choice to protect and strengthen historical stones. The results indicated that the contact angle of the coated samples rises up with treating by silane/siloxane resins. This could be due to the presence of organic groups of poly siloxanes act as hydrophobic agents which increase the hydrophobic nature of the surface contact angle. In addition, Si-OH bond of silane as well as consolidation effect can be created the covalent bonding by mineral surface and filling of the small fissures in the stone surfaces.

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Epoxy-silica polymers as stone conservation materials

Cited by 67 publications

References 19 publications

Tratamientos de protección superficial de materiales de construcción por nuevos materiales híbridos organo-inorgánicos multifuncionales

Tratamientos de protección superficial de materiales de construcción por nuevos materiales híbridos organo-inorgánicos multifuncionales

Hydrophobic properties of new epoxy‐silica hybrids

Silane/Siloxane Surface Treatment for Cohesion Ability and Strengthening Agent of Historical Stone

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