Development of glass-stalks-unsaturated polyester hybrid composites

The aim of this study is to investigate the possibility to use agro-residues of the vinification process as a cheaper and eco-friendly fillers to prepare unsaturated polyester composites for interior design building sector. Experimental unsaturated polyester–based resin composite samples, reinforced with grape stalks, were prepared by a simple casting technique. The glass microspheres were added in the mixing to increase the mechanical and physical properties of the final materials. A silane coupling agent was used to increase the interface adhesion between resin and grape stalks. The samples were subjected to several tests. Unfilled samples were analyzed by Differential Scanning calorimetry (DSC). Prepared silanized and non-silanized composites were completely characterized in order to study the effect of stalk fibers concentration on the mechanical, chemical and physical properties. The results showed that mechanical and physical properties for silanized composites were superior to non-silanized composites. The presence of stalks, up to 50% wt. increased Young's Modulus preserving a satisfactory tensile strength and hardness in comparison with the neat resin properties. Then, the final results showed that grape stalks from winemaking can be satisfactory used as natural filler resource to produce composites for interior furniture

Color prediction with simplified Kubelka-Munk model in glazes containing Fe2O3-ZrSiO4 coral pink pigments

The analysis of the physical interactions between pigments, opacifiers and glazes is fundamental to understand the optical behavior of ceramic glazes. In particular in opaque glazes the crystallized phases can contribute to the optical properties of the system and then to cause changes in the color of the products. In this study the prediction of the color of coral glazes obtained by addition of hematite-zircon pigment (Fe2O3eZrSiO4) in an opaque glaze was carried out with the KubelkaeMunk model. Subsequent to the physical and chemical characterization of the glaze components (frit, opacifier and pigments), the color prediction was performed with the simplified KubelkaeMunk model proposed for zircon pigments. In particular was verified if this model is also valid in the case of pigment Fe2O3eZrSiO4 where the hematite is encapsulated by the zircon structure. Three glazes were prepared to determine the absorption optical constants from the reflectance curves measured with a spectrophotometer. The results obtained with the simplified model were in good agreement with the experimental reflectance curves and the prediction of coral color was possible with a reduced number of experiments

Color prediction with simplified Kubelka-Munk model in glazes containing Fe2O3-ZrSiO4 coral pink pigments

The analysis of the physical interactions between pigments, opacifiers and glazes is fundamental to understand the optical behavior of ceramic glazes. In particular in opaque glazes the crystallized phases can contribute to the optical properties of the system and then to cause changes in the color of the products. In this study the prediction of the color of coral glazes obtained by addition of hematite-zircon pigment (Fe2O3eZrSiO4) in an opaque glaze was carried out with the KubelkaeMunk model. Subsequent to the physical and chemical characterization of the glaze components (frit, opacifier and pigments), the color prediction was performed with the simplified KubelkaeMunk model proposed for zircon pigments. In particular was verified if this model is also valid in the case of pigment Fe2O3eZrSiO4 where the hematite is encapsulated by the zircon structure. Three glazes were prepared to determine the absorption optical constants from the reflectance curves measured with a spectrophotometer. The results obtained with the simplified model were in good agreement with the experimental reflectance curves and the prediction of coral color was possible with a reduced number of experiments

Colouring of opaque ceramic glaze with zircon pigments: Formulation with simplified Kubelka–Munk model

In this study a simplified Kubelka–Munk model is proposed for colour matching purposes. Opaque glazes were prepared to determine theabsorption optical constants from the reflectance curves measured with a spectrophotometer. After the physical and chemical characterization ofthe glaze components (frit and pigments), to analyze the spectrophotometric results a simplification of the Kubelka–Munk model was suggested.To experimentally verify the model, two target green colour were reproduced in laboratory by adding in an opaque glaze a yellow praseodymiumdopedzircon ((Zr,Pr)SiO4) and blue vanadium-doped zircon ((Zr,V)SiO4) pigments. The results were in good agreement with the experimentalreflectance curves and the prediction of colour green glazes was possible with a reduced number of experiments

Colouring of opaque ceramic glaze with zircon pigments: Formulation with simplified Kubelka–Munk model

In this study a simplified Kubelka–Munk model is proposed for colour matching purposes. Opaque glazes were prepared to determine theabsorption optical constants from the reflectance curves measured with a spectrophotometer. After the physical and chemical characterization ofthe glaze components (frit and pigments), to analyze the spectrophotometric results a simplification of the Kubelka–Munk model was suggested.To experimentally verify the model, two target green colour were reproduced in laboratory by adding in an opaque glaze a yellow praseodymiumdopedzircon ((Zr,Pr)SiO4) and blue vanadium-doped zircon ((Zr,V)SiO4) pigments. The results were in good agreement with the experimentalreflectance curves and the prediction of colour green glazes was possible with a reduced number of experiments

Il Color Matching: Fondamenti Teorici della Formulazione Computerizzata del Colore

L'articolo riporta alcuni studi sperimentali sulla possibilità di gestire il colore in ceramic

Prediction of opaque ceramic enamel color using the Kubelka-Munk

In this paper the possibility to predict the color of a ceramic glaze by the Kubelka-Munk theory has been evaluate

Prediction of opaque ceramic enamel color using the Kubelka-Munk

In this paper the possibility to predict the color of a ceramic glaze by the Kubelka-Munk theory has been evaluate

Il Color Matching: Fondamenti Teorici della Formulazione Computerizzata del Colore

L'articolo riporta alcuni studi sperimentali sulla possibilità di gestire il colore in ceramic