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Tactile friction and perception of UV-curable coatings and their relation to physical surface parameters and contact mechanic simulation / Thomas Ules in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Tactile friction and perception of UV-curable coatings and their relation to physical surface parameters and contact mechanic simulation Type de document : texte imprimé Auteurs : Thomas Ules, Auteur ; Michael GrieBer, Auteur ; Andreas Hausberger, Auteur ; Christian Schipfer, Auteur ; Mohammad Mansouri, Auteur ; Peter Fuchs, Auteur ; Sandra Schlögl, Auteur ; Dieter P. Gruber, Auteur Année de publication : 2023 Article en page(s) : p. 1803-1814 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Chimie des surfaces
Dureté (matériaux)
Eléments finis, Méthode des
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Simulation, Méthode de
ToucherIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, the results of new investigations on the relationship between physical surface parameters of polymer-based coatings, skin hydration levels and tactile friction are presented. For this purpose, the chemical composition of the investigated coatings was varied on the basis of the curing and binding agent and also with respect to the addition of selected fillers. This allowed the adjustment of various surface parameters such as hardness, surface wettability and roughness over a wide range. Tribological tests were carried out in which the coefficient of friction between the finger pad and the respective coating was measured for different skin hydration levels. A specially developed setup was used that minimized changing skin hydration levels during the experiments that would impede reproducible friction measurements. While for dry skin the perceived friction correlates well to the coefficient of friction and surface hardness, this is not the case for moist finger skin. The results are explained under the assumption of adhesion dominated friction and the application of the Hertz contact theory. This finding was further investigated through contact mechanic simulations using the finite element method (FEM). To this end, the contact area formation dependence on the reaction force was studied for surfaces of different hardness and skin with different mechanical properties reflecting various hydration levels. The results qualitatively confirmed the experimental findings and the analysis based on the Hertz contact theory. Note de contenu : - EXPERIMENTAL : Materials - Methods - FEM contact model
- RESULTS & DISCUSSION : Physical characterization - Tactile friction - Perception studies - Contact simulation
- Table 1 : Chemical composition of the UV-curable coatings (all formulations contained 2 wt% Irgacure TPO-L)
- Table 2 : Physical surface parameters of the investigated sample coatings
- Table 3 : Elastic moduli (in kPa) of the hyperelastic material model (neo-Hookean solid) for the single skin layers Stratum Corneum (SC), Epidermis (ED) and Dermis (D)DOI : https://doi.org/10.1007/s11998-023-00792-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00792-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40162
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1803-1814[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Tactile perception of coatings : Systematically designed beads and their effect on tactile interaction Type de document : texte imprimé Auteurs : Lisa Skedung, Auteur ; Kathryn L. Harris, Auteur ; Elizabeth S. Collier, Auteur ; Viveca Wallqvist, Auteur ; Anne Kari Nyhus, Auteur ; Lene K. Bjorndal, Auteur Année de publication : 2022 Article en page(s) : p. 16-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Billes de polymères
Caractérisation
Formulation (Génie chimique)
Matériaux -- Propriétés fonctionnelles
Procédés de fabrication
Revêtements organiques
Rugosité
ToucherIndex. décimale : 667.9 Revêtements et enduits Résumé : A systematic series of mono-sized polymer beads were devel¬oped by increasing the proportion of hard (high Tg) relative to soft (low Tg) monomer in the range 0-36 % by weight. The beads were evaluated in one stiffer and one more compliant coating formulation (CF) to investigate their effect on tactile interaction. Physical characterisation and perceptual evaluations uncovered complex interactions between the two, indicating that system¬atic manipulation of surfaces can lead to possible future percep¬tion delivery, but that there is no one size fits all solution. Note de contenu : - Bead fabrication
- Coated panel fabrication
- Characterisatiçon of beads and coating properties
- Surface roughness
- Tactile friction and perceptual measurements using naïve participants
- Psychophysical analysis and results
- Attributes
- Roughness differences
- Tactile perception : simply complicated
- Table : Unstandardised regression coefficients and significance levels from multiple linear regressions including 'hard monomer%' as a covariate and 'formulation' as a factor.En ligne : https://drive.google.com/file/d/1ZSt5_OYjVKMi7sn76G9SewNZAKW7oFsH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38351
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2022) . - p. 16-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23710 - Périodique Bibliothèque principale Documentaires Disponible Tailor made polyether diols / Silke Dederichs in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/02 (05/2002)
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Titre : Tailor made polyether diols Type de document : texte imprimé Auteurs : Silke Dederichs, Auteur ; Gerhard Reusmann, Auteur ; Alois Maier, Auteur ; Norbert Steidl, Auteur ; Andreas Kulawig, Auteur Année de publication : 2002 Article en page(s) : p. 51-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diols
Dispersions et suspensions
Polyéthers
Polyuréthanes
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Many advantages in high performance systems polyurethane dispersions are gaining more and more importance in the paint and coating industry. Some of the characteristics that have contributed to the growth of polyurethane dispersions include improved mechanical properties, high flexibility and tensile strength and stability in changing pH-values. These properties in addition to the nonpolluting characteristics of water based systems, make polyurethane dispersions unique. Various resin building blocks, especially the use of tailor made polyether diols influence positive the final properties of polyurethane dispersions. Note de contenu : - Resin building blocks
- Alpha, oméga- Polyether diols prepared for testing
- Synthesis and properties of alpha, oméga-Polyether diols
- Elongation is improved and comparable tensile strength
- Freeze-thaw stability
- Alpha, oméga-Polyether diols combines the positive properties
- Dispersing diols based on polyethylene glycols
- Ionic polyurethane dispersion combined with non-ionic
- Amount of non-ionic groups affectes propertiesEn ligne : https://drive.google.com/file/d/1LRhZzqXgJZfHp_kO3zIG2m5qBUePeLkg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10776
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Code-barres Cote Support Localisation Section Disponibilité 000643 - Périodique Bibliothèque principale Documentaires Disponible Tailored polymer coatings as corrosion inhibitor for mild steel in acid medium / Ghada M. Abd El-Hafeez in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Tailored polymer coatings as corrosion inhibitor for mild steel in acid medium Type de document : texte imprimé Auteurs : Ghada M. Abd El-Hafeez, Auteur ; Mohamed M. El-Rabeie, Auteur ; Ahlam F. Gaber, Auteur ; Zeinab R. Farag, Auteur Année de publication : 2021 Article en page(s) : p. 581-590 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Caractérisation
Electropolymérisation
Poly(o-bromophénol-co-N-méthylaniline)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Poly(o-bromophenol-co-N-methylaniline) [poly(OBP-co-NMA)] was electropolymerized in an acidic medium at 30°C under inert atmosphere. The formed polymer was characterized using IR spectroscopy, XRD, SEM and TGA analysis. The efficiency of the deposited polymer as a corrosion protection coating on a mild steel electrode in an acidic medium was investigated. Corrosion and impedance measurements reveal that the prepared polymer has excellent passivation properties. The free energy of adsorption of the prepared polymer on the electrode surface was in the range of ≈ - 19.5 kJ mol−1, which reveals a physical adsorption of the inhibitor molecules on the metallic surface. Note de contenu : - MATERIALS AND EXPERIMENTAL PROCEDURES : Materials and solutions - lectrochemical measurements - Preparation of poly(OBP-co-NMA) - Characterization of the electrodeposited polymer
- RESULTS AND DISCUSSION : Characterization of the electrodeposited polymers - Application of poly(OBP-co-NMA) as corrosion inhibitor for mild steel in acidic medium (pH = 2)
- Table 1 : Chemical composition (wt%) of the mild steel electrode
- Table 2 : Infrared absorption bands of POBP, PNMA and poly(OBP-co-NMA)
- Table 3 : Potentiodynamic polarization parameter of mild steel after 1 h of electrode immersion in stagnant naturally aerated polymer solution in naturally aerated aqueous acidic solution pH = 2 at 25°C
- Table 4 : Equivalent circuit parameters for steel recorded after 1 h of electrode immersion in stagnant naturally aerated polymer solution at steady-state potential at 25°CDOI : https://doi.org/10.1007/s11998-020-00426-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00426-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35617
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 581-590[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Take the fast lane with automation / Claudia Bramlage in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2021)
[article]
Titre : Take the fast lane with automation : High-throughput systems can lead to efficient and rapid processing of optimisation projects Type de document : texte imprimé Auteurs : Claudia Bramlage, Auteur ; Ellen Reuter, Auteur ; Philipp Isken, Auteur Année de publication : 2021 Article en page(s) : p. 46-52 Langues : Anglais (eng) Catégories : Automatisation
Essais (technologie)
Formulation (Génie chimique)
Revêtements organiques
Technique de la productionIndex. décimale : 667.9 Revêtements et enduits Résumé : Every year, approximately 43 million tons of coatings are used worldwide: they protect surfaces from corrosion, give them special characteristics such as electrical or thermal conductivity, extend the longevity of consumer goods, and often have a decorative character. At the same time, the demands placed on coatings are constantly increasing, and paint formulators must constantly meet new requirements in the face of evergrowing complexity and changing regulatory framework. Note de contenu : - Preparation of coating formulations
- Automated paint testing
- Case study I : Optimisation of pigment concentrates by combining polymeric wetting and dispersing additives
- Optimised data management
- Case study II : Simplification of a formulation by reducing the number of additives
- High-throughput systems offer powerful support
- Fig. 1 : Comparison of colour strength development of PB 1 5:3 pigment concentrates for rotary mixer (HTE - 6 min duration) ami Skandex shaker (lab - 2h duration)
- Fig. 2 : Substrates produced by the HTE system with rub-out test - left side shows very good pigment stabilisation, right side shows sample with insufficient pigment stabilisation
- Fig. 3 : Setup of samples in case study I
- Fig. 4 : Process steps in case study I
- Fig. 5 : Positive effect of the use of a Grind Aid for a PG 36 pigment concentrate
- Fig. 6 : Simplified version of a model ho predict properties of a pigment concentrate
- Fig. 7 : Formulation assistants allow to indicate the importance of performance criteria & recommend a formulation based on this input
- Fig. 8 : Typical steps in a workflow for defoamer testing
- Fig. 9 : Optimisation of an architectural base paint - rub-out values on similar or better level for 3 pigment concentrates afher optimisation
- Table : Optimisation of an architectural paint formulation - comparison of formulations before and after optimisationPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36269
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