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The trisiloxane polyether surfactant (3-[3-(hydroxy)(polyethoxy)propyl]-1,1,1,3,5,5,5 -heptamethyltrisiloxane) (TS-EO12) was successfully synthesized by a hydrosilylation reaction in the presence of Karstedt catalyst. The structural analysis of the surfactant was done by 1H-NMR, 13C-NMR, 29Si-NMR and FT-IR analysis. In addition the thermal stability of TS-EO12 was studied by the thermogravimetric measurements. On the one hand the surface properties of TS-EO12 at the water-air interface were investigated by surfactant aqueous solutions surface tension measurements carried out at 293 K, 303 K and 313 K, and on the other the aggregation properties were analyzed based on the solubilization properties of TS-EO12 aggregates at different temperatures. On the basis of the obtained thermodynamic parameters of adsorption and micellization of studied surfactant the temperature impact on its surface and volume properties were deduced. It was proved that the tendency of the studied surfactant molecules to adsorb at the water-air interface and to form micelles weakens with decreasing temperature. It was also concluded that the structure of the adsorption layer changes with temperature. Optical microscopy measurements were used for the TS-EO12 micelle morphology determination.
Joanna Karasiewicz; Joanna Krawczyk. Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes. Molecules 2020, 25, 5669 .
AMA StyleJoanna Karasiewicz, Joanna Krawczyk. Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes. Molecules. 2020; 25 (23):5669.
Chicago/Turabian StyleJoanna Karasiewicz; Joanna Krawczyk. 2020. "Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes." Molecules 25, no. 23: 5669.
Density, viscosity and surface tension of Kolliphor® ELP, the nonionic surfactant aqueous solutions were measured at temperature T = 293–318 K and at 5K interval. Steady-state fluorescence measurements have been also made using pyrene as a probe. On the basis of the obtained results, a number of thermodynamic, thermo-acoustic and anharmonic parameters of the studied surfactant have been evaluated and interpreted in terms of structural effects and solute–solvent interactions. The results suggest that the molecules of studied surfactant at concentrations higher than the critical micelle concentration act as structure makers of the water structure.
Katarzyna Szymczyk; Magdalena Szaniawska; Joanna Krawczyk. Temperature Effect on the Adsorption and Volumetric Properties of Aqueous Solutions of Kolliphor®ELP. Molecules 2020, 25, 743 .
AMA StyleKatarzyna Szymczyk, Magdalena Szaniawska, Joanna Krawczyk. Temperature Effect on the Adsorption and Volumetric Properties of Aqueous Solutions of Kolliphor®ELP. Molecules. 2020; 25 (3):743.
Chicago/Turabian StyleKatarzyna Szymczyk; Magdalena Szaniawska; Joanna Krawczyk. 2020. "Temperature Effect on the Adsorption and Volumetric Properties of Aqueous Solutions of Kolliphor®ELP." Molecules 25, no. 3: 743.
Measurements of density, viscosity and light scattering of aqueous solutions of food additive antimicrobial surfactants: sucrose capric acid ester (SMD) and sucrose lauric acid ester (SML) and some other sugar-based ones (n‑octyl‑β‑d‑glucopyranoside (OGP), n‑dodecyl‑β‑d‑glucopyranoside (DDGP), n‑dodecyl‑β‑d‑maltoside (DM)) as well as the fluorescence intensity of 8‑Anilino‑1‑naphthalene-sulfonic acid (ANS) and pyrene (Py) in aqueous solutions of the studied surfactants were carried out at different temperatures. On the basis of the obtained results the critical micelle concentration, average aggregation number, apparent and partial molar volume as well as the standard Gibbs free energy, standard enthalpy and entropy of micellization were determined. From the obtained thermodynamic parameters of micellization of studied sugar surfactants under different conditions, the temperature and type of surfactant impact on their aggregation properties were deduced. From the changes of the standard Gibbs free energy of micellization it results that the tendency of studied surfactants molecules to form micelles comes down as the temperature and surfactant tail length decrease. The presence and strength of the hydrogen bonds between the water molecules and sugar moiety in a surfactant molecule plays a decisive role in the micellization process of the studied sugar-based surfactants.
Joanna Krawczyk. Aggregation properties of sucrose fatty acid esters and some other sugar-based surfactants at different temperatures. Journal of Molecular Liquids 2018, 271, 610 -620.
AMA StyleJoanna Krawczyk. Aggregation properties of sucrose fatty acid esters and some other sugar-based surfactants at different temperatures. Journal of Molecular Liquids. 2018; 271 ():610-620.
Chicago/Turabian StyleJoanna Krawczyk. 2018. "Aggregation properties of sucrose fatty acid esters and some other sugar-based surfactants at different temperatures." Journal of Molecular Liquids 271, no. : 610-620.
Joanna Krawczyk. Thermodynamic properties of disaccharide based surfactants adsorption at the water-air interface. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 551, 50 -57.
AMA StyleJoanna Krawczyk. Thermodynamic properties of disaccharide based surfactants adsorption at the water-air interface. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2018; 551 ():50-57.
Chicago/Turabian StyleJoanna Krawczyk. 2018. "Thermodynamic properties of disaccharide based surfactants adsorption at the water-air interface." Colloids and Surfaces A: Physicochemical and Engineering Aspects 551, no. : 50-57.
The adsorption of surfactants at the water-air and solid-water interfaces and their wetting properties decide their practical applications. Therefore the adsorption of monorhamnolipid, surfactin, n-octyl-β-d-glucopyranoside, n-dodecyl-β-d-glucopyranoside, n-dodecyl-β-d-maltoside, sucrose monodecanoate, sucrose monododecanoate, Tween 20, Tween 60, and Tween 80 at the water-air, polytetrafluoroethylene-water, polyethylene-water, poly(methyl methacrylate)-water, polyamide-water, and quartz-water interfaces, their tendency to form micelles as well as their wetting properties, were considered in the light of their microscopic properties. For this purpose, the components and parameters of the surfactant tail and head, water and solids surface tension, and surfactant contactable area with adherent medium were applied for prediction of surfactant-surfactant and surfactant-solid interactions through the water phase with regard to their adsorption, micellization, and wetting processes. Next, the Gibbs free energy of interactions was compared to the Gibbs free energy of surfactant adsorption at the water-air and solid-water interfaces as well as the micellization. It appeared that from the surfactant-surfactant and surfactant-solid interactions through the water phase determined on the basis of the tail and head of surfactant surface tension, it is possible to predict the surfactant tendency to adsorb at the water-air and solid-water interfaces, as well as to form micelles.
Anna Zdziennicka; Joanna Krawczyk; Katarzyna Szymczyk; Bronisław Jańczuk. Macroscopic and Microscopic Properties of Some Surfactants and Biosurfactants. International Journal of Molecular Sciences 2018, 19, 1934 .
AMA StyleAnna Zdziennicka, Joanna Krawczyk, Katarzyna Szymczyk, Bronisław Jańczuk. Macroscopic and Microscopic Properties of Some Surfactants and Biosurfactants. International Journal of Molecular Sciences. 2018; 19 (7):1934.
Chicago/Turabian StyleAnna Zdziennicka; Joanna Krawczyk; Katarzyna Szymczyk; Bronisław Jańczuk. 2018. "Macroscopic and Microscopic Properties of Some Surfactants and Biosurfactants." International Journal of Molecular Sciences 19, no. 7: 1934.
Solid–liquid interface properties play a crucial role in the adsorption and adhesion of different microorganisms to the solid. There are some methods to inhibit microorganisms’ adsorption at the solid–liquid interface and their adhesion to the solid. These methods can be divided into bulk phase and surface modification. They are often based on the surfactants’ effect on the wettability of the solid in a given system, due to the fact that adsorption and wetting properties of the food additive antimicrobial surfactants (sucrose monolaurate and sucrose monodecanoate as well as some other sugar-based ones (n-octyl-β-d-glucopyranoside, n-dodecyl-β-d-glucopyranoside, n-dodecyl-β-d-maltoside)) in the solid-aqueous solution of surfactant-air system were considered. Quantitative description of adsorption of the studied compounds at the solid–liquid interface was made based on the contact angle of the aqueous solutions of studied surfactants on polytetrafluoroethylene, polyethylene, poly(methyl methacrylate), polyamide and quartz surface and their surface tension. From the above-mentioned considerations, it can be seen that during the wettability process of the studied solids, surfactants are oriented in a specific direction depending on the type of the solid and surfactant. This specific orientation and adsorption of surfactant molecules at the solid–water interface cause changes of the solid surface properties and its wettability, which was successfully predicted in the studied systems.
Joanna Krawczyk. Solid Wettability Modification via Adsorption of Antimicrobial Sucrose Fatty Acid Esters and Some Other Sugar-Based Surfactants. Molecules 2018, 23, 1597 .
AMA StyleJoanna Krawczyk. Solid Wettability Modification via Adsorption of Antimicrobial Sucrose Fatty Acid Esters and Some Other Sugar-Based Surfactants. Molecules. 2018; 23 (7):1597.
Chicago/Turabian StyleJoanna Krawczyk. 2018. "Solid Wettability Modification via Adsorption of Antimicrobial Sucrose Fatty Acid Esters and Some Other Sugar-Based Surfactants." Molecules 23, no. 7: 1597.
The wettability of solids by aqueous solutions of surfactants is very important in many practical applications. Thus, the measured advancing contact angles of aqueous solutions of chosen surfactants on polyethylene (PE) and those taken from the literature on polytetrafluoroethylene (PTFE), poly(methyl methacrylate) (PMMA), and polyamide (nylon 6) were analyzed. Based on the measured values of the contact angles and the literature data of the surface tensions of the studied surfactant solutions, their adsorption at the PE–water interface and the work of adhesion (Wa) were determined. The values of Wa to PE calculated on the basis of the contact angles and surface tensions of these solutions were compared to those determined by applying the new Lifshitz–van der Waals component of the water–PE surface tension. There was a good agreement between the Wa values determined in two different ways. Their contact angles were calculated using the values of PE surface tension, the new Lifshitz–van der Waals component of the water surface tension, and the surface tension of aqueous solutions of the studied surfactants. The contact angle values calculated in such a way were close to the measured values. In the case of PTFE, the same relations were obtained. The values of Wa to PMMA and nylon 6 could be also predicted.
Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Wettability and Adhesion Work Prediction in the Polymer–Aqueous Solution of Surface Active Agent Systems. Colloids and Interfaces 2018, 2, 21 .
AMA StyleAnna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Wettability and Adhesion Work Prediction in the Polymer–Aqueous Solution of Surface Active Agent Systems. Colloids and Interfaces. 2018; 2 (2):21.
Chicago/Turabian StyleAnna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2018. "Wettability and Adhesion Work Prediction in the Polymer–Aqueous Solution of Surface Active Agent Systems." Colloids and Interfaces 2, no. 2: 21.
Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Volumetric properties of rhamnolipid and surfactin at different temperatures. Journal of Molecular Liquids 2018, 255, 562 -571.
AMA StyleAnna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Volumetric properties of rhamnolipid and surfactin at different temperatures. Journal of Molecular Liquids. 2018; 255 ():562-571.
Chicago/Turabian StyleAnna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2018. "Volumetric properties of rhamnolipid and surfactin at different temperatures." Journal of Molecular Liquids 255, no. : 562-571.
Joanna Krawczyk. Temperature impact on the water-air interfacial activity of n-octyl and n-dodecyl-β-d-glucopyranosides. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2017, 533, 61 -67.
AMA StyleJoanna Krawczyk. Temperature impact on the water-air interfacial activity of n-octyl and n-dodecyl-β-d-glucopyranosides. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017; 533 ():61-67.
Chicago/Turabian StyleJoanna Krawczyk. 2017. "Temperature impact on the water-air interfacial activity of n-octyl and n-dodecyl-β-d-glucopyranosides." Colloids and Surfaces A: Physicochemical and Engineering Aspects 533, no. : 61-67.
Anna Zdziennicka; Joanna Krawczyk; Katarzyna Szymczyk; Bronisław Jańczuk. Components and parameters of liquids and some polymers surface tension at different temperature. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2017, 529, 864 -875.
AMA StyleAnna Zdziennicka, Joanna Krawczyk, Katarzyna Szymczyk, Bronisław Jańczuk. Components and parameters of liquids and some polymers surface tension at different temperature. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017; 529 ():864-875.
Chicago/Turabian StyleAnna Zdziennicka; Joanna Krawczyk; Katarzyna Szymczyk; Bronisław Jańczuk. 2017. "Components and parameters of liquids and some polymers surface tension at different temperature." Colloids and Surfaces A: Physicochemical and Engineering Aspects 529, no. : 864-875.
Anna Zdziennicka; Katarzyna Szymczyk; Joanna Krawczyk; Bronisław Jańczuk. Components and parameters of solid/surfactant layer surface tension. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2017, 522, 461 -469.
AMA StyleAnna Zdziennicka, Katarzyna Szymczyk, Joanna Krawczyk, Bronisław Jańczuk. Components and parameters of solid/surfactant layer surface tension. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017; 522 ():461-469.
Chicago/Turabian StyleAnna Zdziennicka; Katarzyna Szymczyk; Joanna Krawczyk; Bronisław Jańczuk. 2017. "Components and parameters of solid/surfactant layer surface tension." Colloids and Surfaces A: Physicochemical and Engineering Aspects 522, no. : 461-469.
Anna Zdziennicka; Katarzyna Szymczyk; Joanna Krawczyk; Bronisław Jańczuk. Some remarks on the solid surface tension determination from contact angle measurements. Applied Surface Science 2017, 405, 88 -101.
AMA StyleAnna Zdziennicka, Katarzyna Szymczyk, Joanna Krawczyk, Bronisław Jańczuk. Some remarks on the solid surface tension determination from contact angle measurements. Applied Surface Science. 2017; 405 ():88-101.
Chicago/Turabian StyleAnna Zdziennicka; Katarzyna Szymczyk; Joanna Krawczyk; Bronisław Jańczuk. 2017. "Some remarks on the solid surface tension determination from contact angle measurements." Applied Surface Science 405, no. : 88-101.
Highlights•Wettability of hydrophobic solids can be predicted theoretically.•Usefulness Lifshitz-van der Waals component of water is higher than commonly used.•Solid surface tension influences liquid one.•Critical surface tension of solid wetting should not be equal to surface tension. AbstractThe measurements of the contact angle (θθ) of aqueous solutions of rhamnolipid (RL), n-octyl-β-D-glucopyranoside (OGP), Triton X-100 (TX-100) and sodium dodecylsulfate (SDDS) on the polyethylene (PE) surface were carried out. The θθ values on PE and polytetrafluoroethylene (PTFE) were also determined theoretically by using the values of surface tension of polymers and the Lifshitz-van der Waals component of water surface tension. On the basis of θθ values of surfactant solutions on PE the critical micelle concentration of RL, OGP, TX-100 and SDDS, critical surface tension of PE wetting (γCγC), Gibbs surface excess concentration of these surfactants at the PE-water interface, work of adhesion of surfactant solutions to PE, fraction of PE occupied by surfactant molecules and Gibbs standard free energy of surfactants adsorption at the PE-water interface were established. The γCγC of PE wetting from the relationship between the adhesion and surface tension of surfactant solutions and standard Gibbs free energy of adsorption from the Langmuir equation were determined. The standard Gibbs free energy of adsorption at the PE-water interface was compared to that at the water-air one. The good agreement between the measured and calculated θθ values of RL, OGP, TX-100 and SDDS solutions on PTFE and PE was obtained. Graphical abstract
Diana Maſko; Anna Zdziennicka; Joanna Krawczyk; Bronisſaw Jaſczuk; Diana Mańko; Bronisław Jańczuk. Wettability prediction of such polymers as polyethylene and polytetrafluoroethylene by aqueous solutions of classical surfactants and biosurfactants. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2016, 506, 409 -415.
AMA StyleDiana Maſko, Anna Zdziennicka, Joanna Krawczyk, Bronisſaw Jaſczuk, Diana Mańko, Bronisław Jańczuk. Wettability prediction of such polymers as polyethylene and polytetrafluoroethylene by aqueous solutions of classical surfactants and biosurfactants. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2016; 506 ():409-415.
Chicago/Turabian StyleDiana Maſko; Anna Zdziennicka; Joanna Krawczyk; Bronisſaw Jaſczuk; Diana Mańko; Bronisław Jańczuk. 2016. "Wettability prediction of such polymers as polyethylene and polytetrafluoroethylene by aqueous solutions of classical surfactants and biosurfactants." Colloids and Surfaces A: Physicochemical and Engineering Aspects 506, no. : 409-415.
Highlights•RL is better wetting agent for PTFE than classical anionic surfactants.•Effectiveness of OGP adsorption at PTFE–water interface is higher than TX-100.•Szyszkowski equation describes isotherm of PTFE–solution interface tension.•RL and OGP adsorption at PTFE–water and water–air interfaces is nearly the same.•Solution adhesion to PTFE surface does not depend on RL and OGP concentration. AbstractThe measurements of the contact angle of the aqueous solutions of n-octyl-β-d-glucopyranoside (OGP) and monorhamnolipid (RL) on polytetrafluoroethylene surface (PTFE) as well as the water, diiodomethane and formamide on the PTFE covered by the OGP and RL layer were made at 293 K. On the basis of the obtained contact angle the values of the critical surface tension of the PTFE wetting, adhesion work of the solutions to the PTFE and the adsorption of the OGP and RL at the PTFE–water interface were calculated. The tendency of OGP and RL to adsorb at the PTFE–water interface was considered by determination of the standard Gibbs free energy of adsorption of these surfactants. To determine this energy, a new equation was proposed which was based on the critical micelle concentration of surfactants (CMC), surface tension and contact angle of solution at the CMC. The values of the standard Gibbs free energy of OGP and RL adsorption were compared to those determined by using the Langmuir and Gu and Zhu equations. It was stated that there is the good agreement between these values calculated in different ways. These values are close to those determined for the OGP and RL at the water–air interface. Graphical abstractThe influence of the surface tension of aqueous solutions of RL and OGP and PTFE–solution interface tension on the contact angle in the PTFE–solution drop–air system.
Diana Mańko; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Wetting and adsorption properties of n-octyl-β-d-glucopyranoside and monorhamnolipid in the system polytetrafluoroethylene–solution–air. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2015, 486, 114 -123.
AMA StyleDiana Mańko, Anna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Wetting and adsorption properties of n-octyl-β-d-glucopyranoside and monorhamnolipid in the system polytetrafluoroethylene–solution–air. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2015; 486 ():114-123.
Chicago/Turabian StyleDiana Mańko; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2015. "Wetting and adsorption properties of n-octyl-β-d-glucopyranoside and monorhamnolipid in the system polytetrafluoroethylene–solution–air." Colloids and Surfaces A: Physicochemical and Engineering Aspects 486, no. : 114-123.
The purpose of these studies was to determine the surface free energy of the human skin and its critical surface tension of wetting in the skin – surfactant aqueous solution – air system in relation to different types of surfactants. The surface free energy of the skin and its components was calculated using the equilibrium advancing contact angle values of water, formamide, and diiodomethane on the forearm skin surface. Next, taking into account the measured values of the contact angle of aqueous solutions of SDDS, CTAB, TX‐100 and TX‐114 on the skin surface and data of their surface tension, the critical surface tension of the skin wetting was determined. We can classify the skin surface as low‐energetic one. The critical surface tension of the skin wetting depends on the type of surfactant. It is possible to determine the critical surface tension of the human skin wetting on the basis of the values of the contact angle of aqueous solutions of surfactants and their surface tension. In this respect, nonionic surfactants seem to be the most appropriate.
J. Krawczyk. Surface free energy of the human skin and its critical surface tension of wetting in the skin/surfactant aqueous solution/air system. Skin Research and Technology 2014, 21, 214 -223.
AMA StyleJ. Krawczyk. Surface free energy of the human skin and its critical surface tension of wetting in the skin/surfactant aqueous solution/air system. Skin Research and Technology. 2014; 21 (2):214-223.
Chicago/Turabian StyleJ. Krawczyk. 2014. "Surface free energy of the human skin and its critical surface tension of wetting in the skin/surfactant aqueous solution/air system." Skin Research and Technology 21, no. 2: 214-223.
Katarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Behaviour of cetyltrimethylammonium bromide, Triton X-100 and Triton X-114 in mixed monolayer at the (water–air) interface. The Journal of Chemical Thermodynamics 2014, 69, 85 -92.
AMA StyleKatarzyna Szymczyk, Anna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Behaviour of cetyltrimethylammonium bromide, Triton X-100 and Triton X-114 in mixed monolayer at the (water–air) interface. The Journal of Chemical Thermodynamics. 2014; 69 ():85-92.
Chicago/Turabian StyleKatarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2014. "Behaviour of cetyltrimethylammonium bromide, Triton X-100 and Triton X-114 in mixed monolayer at the (water–air) interface." The Journal of Chemical Thermodynamics 69, no. : 85-92.
Katarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Correlation between wetting, adhesion and adsorption in the polymer–aqueous solutions of ternary surfactant mixtures–air systems. Applied Surface Science 2014, 288, 488 -496.
AMA StyleKatarzyna Szymczyk, Anna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Correlation between wetting, adhesion and adsorption in the polymer–aqueous solutions of ternary surfactant mixtures–air systems. Applied Surface Science. 2014; 288 ():488-496.
Chicago/Turabian StyleKatarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2014. "Correlation between wetting, adhesion and adsorption in the polymer–aqueous solutions of ternary surfactant mixtures–air systems." Applied Surface Science 288, no. : 488-496.
Joanna Krawczyk; Katarzyna Szymczyk; Anna Zdziennicka; Bronisław Jańczuk. Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system II. Critical surface tension of polymers wetting and work of adhesion. International Journal of Adhesion and Adhesives 2013, 45, 106 -111.
AMA StyleJoanna Krawczyk, Katarzyna Szymczyk, Anna Zdziennicka, Bronisław Jańczuk. Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system II. Critical surface tension of polymers wetting and work of adhesion. International Journal of Adhesion and Adhesives. 2013; 45 ():106-111.
Chicago/Turabian StyleJoanna Krawczyk; Katarzyna Szymczyk; Anna Zdziennicka; Bronisław Jańczuk. 2013. "Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system II. Critical surface tension of polymers wetting and work of adhesion." International Journal of Adhesion and Adhesives 45, no. : 106-111.
Wettability of polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA) and nylon 6 by aqueous solutions of binary mixtures composed of cetyltrimethylammonium bromide (CTAB) with p-(1,1,3,3-tetramethylbutyl)-phenoxypolyoxyethylene glycols, Triton X-100 (TX-100) and Triton X-114 (TX-114) with regard to the tendency of their adsorption at the water–air and polymer–water interfaces was considered on the basis of the measured values of the contact angle, the dependence between the adhesion and surface tension as well as the Gibbs surface excess concentration. It was shown that the wettability of PTFE, PMMA and nylon 6 depends on the concentration and composition of the binary mixtures of surfactants in water and the best wettability occurs at the concentration of the mixtures corresponding to the critical micelle concentration of their solutions. However, at the lower concentrations the synergetic effect in the wettability of polymers by the CTAB+TX-100 and CTAB+TX-114 mixtures takes place. This effect was confirmed by the standard Gibbs free energy of adsorption of binary mixtures of surfactants at the polymer–water interface calculated on the basis of the Gu and Zhu equation. The standard Gibbs free energy of adsorption being a measure of the efficiency of a given mixture to adsorb at the polymer–water interface changes in a different way from the maximal Gibbs surface excess concentration of these mixtures calculated from the Gibbs isotherm equation which suggests that the changes of the efficiency of the adsorption process are not proportional to its effectiveness.
Joanna Krawczyk; Katarzyna Szymczyk; Anna Zdziennicka; Bronisław Jańczuk. Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system I—Correlation between the adsorption of surfactants mixture and contact angle. International Journal of Adhesion and Adhesives 2013, 45, 98 -105.
AMA StyleJoanna Krawczyk, Katarzyna Szymczyk, Anna Zdziennicka, Bronisław Jańczuk. Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system I—Correlation between the adsorption of surfactants mixture and contact angle. International Journal of Adhesion and Adhesives. 2013; 45 ():98-105.
Chicago/Turabian StyleJoanna Krawczyk; Katarzyna Szymczyk; Anna Zdziennicka; Bronisław Jańczuk. 2013. "Wettability of polymers by aqueous solution of binary surfactants mixture with regard to adhesion in polymer–solution system I—Correlation between the adsorption of surfactants mixture and contact angle." International Journal of Adhesion and Adhesives 45, no. : 98-105.
Katarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. Mutual influence of cetyltrimethylammonium bromide and Triton X-100 on their adsorption at the water–air interface. The Journal of Chemical Thermodynamics 2013, 59, 35 -42.
AMA StyleKatarzyna Szymczyk, Anna Zdziennicka, Joanna Krawczyk, Bronisław Jańczuk. Mutual influence of cetyltrimethylammonium bromide and Triton X-100 on their adsorption at the water–air interface. The Journal of Chemical Thermodynamics. 2013; 59 ():35-42.
Chicago/Turabian StyleKatarzyna Szymczyk; Anna Zdziennicka; Joanna Krawczyk; Bronisław Jańczuk. 2013. "Mutual influence of cetyltrimethylammonium bromide and Triton X-100 on their adsorption at the water–air interface." The Journal of Chemical Thermodynamics 59, no. : 35-42.