The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
Anna Zdziennicka - One of the best experts on this subject based on the ideXlab platform.
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Correlation between adhesion of aqueous solutions of nonionic and anionic surfactant mixture with short-chain alcohols to polymer surface and their adsorption at interfaces. II. Critical surface tension of polymer wetting and work of adhesion
International Journal of Adhesion and Adhesives, 2017Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:Abstract On the basis of contact angle measurements of aqueous solutions of TX-100 and SDDS mixtures with methanol, ethanol or propanol on PTFE and nylon-6 surfaces presented in the first part of our paper and the literature data concerning the surface tension of the studied solutions, the critical surface tension of polymer wetting was calculated and compared with its surface tension. Moreover, the work of adhesion of the solution to the PTFE surface was determined directly from the Young-Dupre Equation, together with the dependence between the adhesion tension and the surface tension of the solution as well as between the cosine of the contact angle and the reciprocal of the surface tension of the solution. In the case of nylon-6, the work of adhesion was established on the basis of Neumann et al. and van Oss et al. approaches as well as the Young-Dupre Equation. For both polymers work of adhesion was compared with the work of adhesion of particular components of the studied solutions to their surfaces.
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Adhesion of canola and diesel oils to some parts of diesel engine in the light of surface tension components and parameters of these substrates
International Journal of Adhesion and Adhesives, 2015Co-Authors: Anna Zdziennicka, Bronisław Jańczuk, Katarzyna Szymczyk, Rafał Longwic, Przemysław SanderAbstract:Abstract Measurements of the surface tension of canola oil from different manufacturers, diesel oil and water–oil interface tension as well as the contact angle on different parts of the diesel engine were made. The contact angle for canola and diesel oils on polytetrafluoroethylene (PTFE) and polymethyl methacrylate (PMMA) surfaces as well as for water, diiodomethane and formamide on different parts of the diesel engine was also measured. On the basis of the obtained results as well as the van Oss et al. approach to the interfacial tension and the Young Equation the Lifshitz–van der Waals component of the surface tension and electron-donor and electron-acceptor parameters of the acid–base components of this tension of canola and diesel oils and parts of diesel engine were determined. Taking into account the determined values of the parameters and components of the surface tension of diesel and canola oils, their adhesion to the particular parts of a diesel engine was determined by using the van Oss et al. Equation and compared to the adhesion work determined from the Young–Dupre Equation. It appeared that the adhesion work determined from the van Oss et al. Equation which decreased the precursor film pressure is comparable to that determined from the Young–Dupre Equation. Adhesion work of the diesel oil to different parts of the diesel engine is somewhat lower than that of canola oils. In addition the water–diesel oil interface tension is lower than that for water–canola oil.
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Adsorption of Triton X-100 and cetyltrimethylammonium bromide mixture with ethanol at nylon-6–solution interface with regard to nylon-6 wettability: II. Work of adhesion and activity of surfactants at interfaces
Adsorption-journal of The International Adsorption Society, 2013Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:On the basis of the values of the surface tension of the aqueous solutions of the Triton X-100 and CTAB mixture with ethanol, the surface tension of nylon-6 and the nylon-6–solution interfacial tension, the activity of the surfactant mixture and ethanol at the nylon-6–solution interface was calculated and compared to that at the solution–air one. For these calculations, the Sprow and Prausnitz Equation was applied. The obtained values of the activity were used for the calculations of the work of adhesion of the solution to the polymer surface. The values of the work of adhesion obtained in this way were compared to those determined from the Young–Dupre Equation by using the contact angle values of the aqueous solutions of the TX-100 and CTAB mixture with ethanol measured on the nylon-6 surface. The changes of the work of adhesion determined from the Young–Dupre Equation were also considered as a function of the surface tension of the solution, its polar component and the interfacial interaction parameter.
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The relationship between the adhesion work, the wettability and composition of the surface layer in the systems polymer/aqueous solution of anionic surfactants and alcohol mixtures
Applied Surface Science, 2010Co-Authors: Anna Zdziennicka, Bronisław JańczukAbstract:Abstract Measurements of advancing contact angle (θ) were carried out on polytetrafluoroethylene (PTFE) and polymethylmethacrylate (PMMA) for aqueous solution of sodium dodecyl sulfate (SDDS) mixtures with methanol, ethanol and propanol in the range of SDDS concentration from 10−5 to 10−2 M, and for sodium hexadecyl sulfonate (SHS) with the same alcohols at the SHS concentration ranging from 10−5 to 8 × 10−4 M at 293 K. The concentration of methanol, ethanol and propanol used for measurements varied from 0 to 21.1, 11.97 and 6.67 M, respectively. On the basis of the contact angles the critical surface tension of PTFE and PMMA wetting was determined by using for this purpose the relationship between the adhesion and the surface tension and cos θ and surface tension both at constant alcohol and surfactant concentration, respectively. The obtained contact angles were also used in the Young Dupre’ Equation for calculations of the adhesion work of aqueous solution of mixtures of anionic surfactants and short chain alcohols to PTFE and PMMA surface. The adhesion work calculated in this way was compared to that of the particular components of aqueous solution to these surfaces determined on the basis of the surface tension components and parameters of the surface tension of the surface active agents, water, PTFE and PMMA from van Oss et al. Equation. The calculated adhesion work was discussed in the light of the concentration of surface active agents at polymer–water and water–air interface determined from Lucassen-Reynders, Gibbs and Guggenheim-Adam Equations.
Ferhat Hammoum - One of the best experts on this subject based on the ideXlab platform.
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A predictive and experimental method to assess bitumen emulsion wetting on mineral substrates
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2016Co-Authors: Layella Ziyani, Vincent Gaudefroy, Valéry Ferber, Ferhat HammoumAbstract:Abstract This paper deals with wetting kinetics and adhesion of bitumen emulsions on mineral surfaces. To this purpose, four mineral substrates: gneiss, diorite, limestone and quartzite and three emulsions were tested. First, surface properties of the materials were determined and theoretical bitumen emulsion/mineral substrate work of adhesion was calculated. Second, bitumen emulsion/mineral substrate contact angles were measured as a function of time and images of emulsion droplets were taken to highlight drop shape evolution and water evaporation. Experimental bitumen emulsion/mineral work of adhesion was assessed using contact angle values and Young-Dupre Equation usually employed for pure liquids. It was proved that quartzite has the highest surface energy, and gneiss has the lowest. The highest theoretical work of adhesion was noted with one of the emulsions studied and quartzite. However, error bars found for all the values were important. The calculation of experimental work of adhesion showed the same tendency as for theoretical work and error bars were lower. Consequently, Young-Dupre Equation is valid for emulsion/substrate systems at short times.
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A predictive and experimental method to assess bitumen emulsion wetting on mineral substrates A Physicochemical and engineering aspects
Colloids and Surfaces, 2016Co-Authors: Layella Ziyani, Vincent Gaudefroy, Valéry Ferber, Ferhat HammoumAbstract:This paper deals with wetting kinetics and adhesion of bitumen emulsions on mineral surfaces. To this purpose, four mineral substrates: gneiss, diorite, limestone and quartzite and three emulsions were tested. First, surface properties of the materials were determined and theoretical bitumen emulsion/mineral substrate work of adhesion was calculated. Second, bitumen emulsion/mineral substrate contact angles were measured as a function of time and images of emulsion droplets were taken to highlight drop shape evolution and water evaporation. Experimental bitumen emulsion/mineral work of adhesion was assessed using contact angle values and Young-Dupre Equation usually employed for pure liquids. It was proved that quartzite has the highest surface energy, and gneiss has the lowest. The highest theoretical work of adhesion was noted with one of the emulsions studied and quartzite. However, error bars found for all the values were important. The calculation of experimental work of adhesion showed the same tendency as for theoretical work and error bars were lower. Consequently, Young-Dupre Equation is valid for emulsion/substrate systems at short times.
Bronisław Jańczuk - One of the best experts on this subject based on the ideXlab platform.
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Correlation between adhesion of aqueous solutions of nonionic and anionic surfactant mixture with short-chain alcohols to polymer surface and their adsorption at interfaces. II. Critical surface tension of polymer wetting and work of adhesion
International Journal of Adhesion and Adhesives, 2017Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:Abstract On the basis of contact angle measurements of aqueous solutions of TX-100 and SDDS mixtures with methanol, ethanol or propanol on PTFE and nylon-6 surfaces presented in the first part of our paper and the literature data concerning the surface tension of the studied solutions, the critical surface tension of polymer wetting was calculated and compared with its surface tension. Moreover, the work of adhesion of the solution to the PTFE surface was determined directly from the Young-Dupre Equation, together with the dependence between the adhesion tension and the surface tension of the solution as well as between the cosine of the contact angle and the reciprocal of the surface tension of the solution. In the case of nylon-6, the work of adhesion was established on the basis of Neumann et al. and van Oss et al. approaches as well as the Young-Dupre Equation. For both polymers work of adhesion was compared with the work of adhesion of particular components of the studied solutions to their surfaces.
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Adhesion of canola and diesel oils to some parts of diesel engine in the light of surface tension components and parameters of these substrates
International Journal of Adhesion and Adhesives, 2015Co-Authors: Anna Zdziennicka, Bronisław Jańczuk, Katarzyna Szymczyk, Rafał Longwic, Przemysław SanderAbstract:Abstract Measurements of the surface tension of canola oil from different manufacturers, diesel oil and water–oil interface tension as well as the contact angle on different parts of the diesel engine were made. The contact angle for canola and diesel oils on polytetrafluoroethylene (PTFE) and polymethyl methacrylate (PMMA) surfaces as well as for water, diiodomethane and formamide on different parts of the diesel engine was also measured. On the basis of the obtained results as well as the van Oss et al. approach to the interfacial tension and the Young Equation the Lifshitz–van der Waals component of the surface tension and electron-donor and electron-acceptor parameters of the acid–base components of this tension of canola and diesel oils and parts of diesel engine were determined. Taking into account the determined values of the parameters and components of the surface tension of diesel and canola oils, their adhesion to the particular parts of a diesel engine was determined by using the van Oss et al. Equation and compared to the adhesion work determined from the Young–Dupre Equation. It appeared that the adhesion work determined from the van Oss et al. Equation which decreased the precursor film pressure is comparable to that determined from the Young–Dupre Equation. Adhesion work of the diesel oil to different parts of the diesel engine is somewhat lower than that of canola oils. In addition the water–diesel oil interface tension is lower than that for water–canola oil.
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Adsorption of Triton X-100 and cetyltrimethylammonium bromide mixture with ethanol at nylon-6–solution interface with regard to nylon-6 wettability: II. Work of adhesion and activity of surfactants at interfaces
Adsorption-journal of The International Adsorption Society, 2013Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:On the basis of the values of the surface tension of the aqueous solutions of the Triton X-100 and CTAB mixture with ethanol, the surface tension of nylon-6 and the nylon-6–solution interfacial tension, the activity of the surfactant mixture and ethanol at the nylon-6–solution interface was calculated and compared to that at the solution–air one. For these calculations, the Sprow and Prausnitz Equation was applied. The obtained values of the activity were used for the calculations of the work of adhesion of the solution to the polymer surface. The values of the work of adhesion obtained in this way were compared to those determined from the Young–Dupre Equation by using the contact angle values of the aqueous solutions of the TX-100 and CTAB mixture with ethanol measured on the nylon-6 surface. The changes of the work of adhesion determined from the Young–Dupre Equation were also considered as a function of the surface tension of the solution, its polar component and the interfacial interaction parameter.
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The relationship between the adhesion work, the wettability and composition of the surface layer in the systems polymer/aqueous solution of anionic surfactants and alcohol mixtures
Applied Surface Science, 2010Co-Authors: Anna Zdziennicka, Bronisław JańczukAbstract:Abstract Measurements of advancing contact angle (θ) were carried out on polytetrafluoroethylene (PTFE) and polymethylmethacrylate (PMMA) for aqueous solution of sodium dodecyl sulfate (SDDS) mixtures with methanol, ethanol and propanol in the range of SDDS concentration from 10−5 to 10−2 M, and for sodium hexadecyl sulfonate (SHS) with the same alcohols at the SHS concentration ranging from 10−5 to 8 × 10−4 M at 293 K. The concentration of methanol, ethanol and propanol used for measurements varied from 0 to 21.1, 11.97 and 6.67 M, respectively. On the basis of the contact angles the critical surface tension of PTFE and PMMA wetting was determined by using for this purpose the relationship between the adhesion and the surface tension and cos θ and surface tension both at constant alcohol and surfactant concentration, respectively. The obtained contact angles were also used in the Young Dupre’ Equation for calculations of the adhesion work of aqueous solution of mixtures of anionic surfactants and short chain alcohols to PTFE and PMMA surface. The adhesion work calculated in this way was compared to that of the particular components of aqueous solution to these surfaces determined on the basis of the surface tension components and parameters of the surface tension of the surface active agents, water, PTFE and PMMA from van Oss et al. Equation. The calculated adhesion work was discussed in the light of the concentration of surface active agents at polymer–water and water–air interface determined from Lucassen-Reynders, Gibbs and Guggenheim-Adam Equations.
Layella Ziyani - One of the best experts on this subject based on the ideXlab platform.
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A predictive and experimental method to assess bitumen emulsion wetting on mineral substrates
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2016Co-Authors: Layella Ziyani, Vincent Gaudefroy, Valéry Ferber, Ferhat HammoumAbstract:Abstract This paper deals with wetting kinetics and adhesion of bitumen emulsions on mineral surfaces. To this purpose, four mineral substrates: gneiss, diorite, limestone and quartzite and three emulsions were tested. First, surface properties of the materials were determined and theoretical bitumen emulsion/mineral substrate work of adhesion was calculated. Second, bitumen emulsion/mineral substrate contact angles were measured as a function of time and images of emulsion droplets were taken to highlight drop shape evolution and water evaporation. Experimental bitumen emulsion/mineral work of adhesion was assessed using contact angle values and Young-Dupre Equation usually employed for pure liquids. It was proved that quartzite has the highest surface energy, and gneiss has the lowest. The highest theoretical work of adhesion was noted with one of the emulsions studied and quartzite. However, error bars found for all the values were important. The calculation of experimental work of adhesion showed the same tendency as for theoretical work and error bars were lower. Consequently, Young-Dupre Equation is valid for emulsion/substrate systems at short times.
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A predictive and experimental method to assess bitumen emulsion wetting on mineral substrates A Physicochemical and engineering aspects
Colloids and Surfaces, 2016Co-Authors: Layella Ziyani, Vincent Gaudefroy, Valéry Ferber, Ferhat HammoumAbstract:This paper deals with wetting kinetics and adhesion of bitumen emulsions on mineral surfaces. To this purpose, four mineral substrates: gneiss, diorite, limestone and quartzite and three emulsions were tested. First, surface properties of the materials were determined and theoretical bitumen emulsion/mineral substrate work of adhesion was calculated. Second, bitumen emulsion/mineral substrate contact angles were measured as a function of time and images of emulsion droplets were taken to highlight drop shape evolution and water evaporation. Experimental bitumen emulsion/mineral work of adhesion was assessed using contact angle values and Young-Dupre Equation usually employed for pure liquids. It was proved that quartzite has the highest surface energy, and gneiss has the lowest. The highest theoretical work of adhesion was noted with one of the emulsions studied and quartzite. However, error bars found for all the values were important. The calculation of experimental work of adhesion showed the same tendency as for theoretical work and error bars were lower. Consequently, Young-Dupre Equation is valid for emulsion/substrate systems at short times.
Magdalena Bielawska - One of the best experts on this subject based on the ideXlab platform.
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Correlation between adhesion of aqueous solutions of nonionic and anionic surfactant mixture with short-chain alcohols to polymer surface and their adsorption at interfaces. II. Critical surface tension of polymer wetting and work of adhesion
International Journal of Adhesion and Adhesives, 2017Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:Abstract On the basis of contact angle measurements of aqueous solutions of TX-100 and SDDS mixtures with methanol, ethanol or propanol on PTFE and nylon-6 surfaces presented in the first part of our paper and the literature data concerning the surface tension of the studied solutions, the critical surface tension of polymer wetting was calculated and compared with its surface tension. Moreover, the work of adhesion of the solution to the PTFE surface was determined directly from the Young-Dupre Equation, together with the dependence between the adhesion tension and the surface tension of the solution as well as between the cosine of the contact angle and the reciprocal of the surface tension of the solution. In the case of nylon-6, the work of adhesion was established on the basis of Neumann et al. and van Oss et al. approaches as well as the Young-Dupre Equation. For both polymers work of adhesion was compared with the work of adhesion of particular components of the studied solutions to their surfaces.
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Adsorption of Triton X-100 and cetyltrimethylammonium bromide mixture with ethanol at nylon-6–solution interface with regard to nylon-6 wettability: II. Work of adhesion and activity of surfactants at interfaces
Adsorption-journal of The International Adsorption Society, 2013Co-Authors: Magdalena Bielawska, Bronisław Jańczuk, Anna ZdziennickaAbstract:On the basis of the values of the surface tension of the aqueous solutions of the Triton X-100 and CTAB mixture with ethanol, the surface tension of nylon-6 and the nylon-6–solution interfacial tension, the activity of the surfactant mixture and ethanol at the nylon-6–solution interface was calculated and compared to that at the solution–air one. For these calculations, the Sprow and Prausnitz Equation was applied. The obtained values of the activity were used for the calculations of the work of adhesion of the solution to the polymer surface. The values of the work of adhesion obtained in this way were compared to those determined from the Young–Dupre Equation by using the contact angle values of the aqueous solutions of the TX-100 and CTAB mixture with ethanol measured on the nylon-6 surface. The changes of the work of adhesion determined from the Young–Dupre Equation were also considered as a function of the surface tension of the solution, its polar component and the interfacial interaction parameter.
