Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System
The aim of this research was to elucidate the surface active properties of <i>Saponaria officinalis</i> (soapwort) extract containing the plant surfactants saponins. To this end, the advancing contact angle (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML&qu...
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MDPI AG
2023-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/13/4943 |
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| author | Adam Grzywaczyk Wojciech Smułek Ewa Kaczorek Anna Zdziennicka Bronisław Jańczuk |
| author_facet | Adam Grzywaczyk Wojciech Smułek Ewa Kaczorek Anna Zdziennicka Bronisław Jańczuk |
| author_sort | Adam Grzywaczyk |
| collection | DOAJ |
| description | The aim of this research was to elucidate the surface active properties of <i>Saponaria officinalis</i> (soapwort) extract containing the plant surfactants saponins. To this end, the advancing contact angle (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula>) of water, formamide and diiodomethane on the glass, as well as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula> of the aqueous solution of <i>S. officinalis</i> extract fractions on PTFE, PMMA and glass, were studied. Based on the obtained results, the wetting behaviour of saponins was considered with regard to the surface tension components and parameters of the solutions and solids. The investigations also involved the description of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula> isotherms, the dependences between the cosine of contact angle and/or the adhesion of the solution to the solid surfaces and solution surface tension, as well as the critical surface tension of PTFE, PMMA and glass wetting. These dependences were studied based on the saponin adsorption at the different interfaces, which was deduced from the dependence between the adhesion and surface tension of the solution, as well as using the Gibbs and Frumkin isotherm equations. This proved that the saponins are poor wetting agents and that the contact angle isotherm can be described by the exponential function of the second order as well as the Szyszkowski equation, but only for PTFE. |
| first_indexed | 2024-03-11T01:34:27Z |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T01:34:27Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-abe59c1823764af9ac6d830377341aa22023-11-18T17:05:47ZengMDPI AGMolecules1420-30492023-06-012813494310.3390/molecules28134943Thermodynamic Consideration of the Solid Saponin Extract Drop–Air SystemAdam Grzywaczyk0Wojciech Smułek1Ewa Kaczorek2Anna Zdziennicka3Bronisław Jańczuk4Institute of Chemical Technology and Engineering, Poznań University of Technology, Berdychowo 4, 60-965 Poznań, PolandInstitute of Chemical Technology and Engineering, Poznań University of Technology, Berdychowo 4, 60-965 Poznań, PolandInstitute of Chemical Technology and Engineering, Poznań University of Technology, Berdychowo 4, 60-965 Poznań, PolandDepartment of Interfacial Phenomena, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, PolandDepartment of Interfacial Phenomena, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, PolandThe aim of this research was to elucidate the surface active properties of <i>Saponaria officinalis</i> (soapwort) extract containing the plant surfactants saponins. To this end, the advancing contact angle (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula>) of water, formamide and diiodomethane on the glass, as well as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula> of the aqueous solution of <i>S. officinalis</i> extract fractions on PTFE, PMMA and glass, were studied. Based on the obtained results, the wetting behaviour of saponins was considered with regard to the surface tension components and parameters of the solutions and solids. The investigations also involved the description of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula> isotherms, the dependences between the cosine of contact angle and/or the adhesion of the solution to the solid surfaces and solution surface tension, as well as the critical surface tension of PTFE, PMMA and glass wetting. These dependences were studied based on the saponin adsorption at the different interfaces, which was deduced from the dependence between the adhesion and surface tension of the solution, as well as using the Gibbs and Frumkin isotherm equations. This proved that the saponins are poor wetting agents and that the contact angle isotherm can be described by the exponential function of the second order as well as the Szyszkowski equation, but only for PTFE.https://www.mdpi.com/1420-3049/28/13/4943contact angleadsorptionsaponinsadhesion tensionadhesion workGibbs free energy of adsorption |
| spellingShingle | Adam Grzywaczyk Wojciech Smułek Ewa Kaczorek Anna Zdziennicka Bronisław Jańczuk Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System Molecules contact angle adsorption saponins adhesion tension adhesion work Gibbs free energy of adsorption |
| title | Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System |
| title_full | Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System |
| title_fullStr | Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System |
| title_full_unstemmed | Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System |
| title_short | Thermodynamic Consideration of the Solid Saponin Extract Drop–Air System |
| title_sort | thermodynamic consideration of the solid saponin extract drop air system |
| topic | contact angle adsorption saponins adhesion tension adhesion work Gibbs free energy of adsorption |
| url | https://www.mdpi.com/1420-3049/28/13/4943 |
| work_keys_str_mv | AT adamgrzywaczyk thermodynamicconsiderationofthesolidsaponinextractdropairsystem AT wojciechsmułek thermodynamicconsiderationofthesolidsaponinextractdropairsystem AT ewakaczorek thermodynamicconsiderationofthesolidsaponinextractdropairsystem AT annazdziennicka thermodynamicconsiderationofthesolidsaponinextractdropairsystem AT bronisławjanczuk thermodynamicconsiderationofthesolidsaponinextractdropairsystem |