1
|
Hamieh T. Surface Thermodynamic Properties of Poly Lactic Acid by Inverse Gas Chromatography. Biomimetics (Basel) 2024; 9:268. [PMID: 38786478 PMCID: PMC11117825 DOI: 10.3390/biomimetics9050268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
Poly lactic acid (PLA) is one of the most commonly used bio-derived thermoplastic polymers in 3D and 4D printing applications. The determination of PLA surface properties is of capital importance in 3D/4D printing technology. The surface thermodynamic properties of PLA polymers were determined using the inverse gas chromatography (IGC) technique at infinite dilution. The determination of the retention volume of polar and non-polar molecules adsorbed on the PLA particles filling the column allowed us to obtain the dispersive, polar, and Lewis's acid-base surface properties at different temperatures from 40 °C to 100 °C. The applied surface method was based on our recent model that used the London dispersion equation, the new chromatographic parameter function of the deformation polarizability, and the harmonic mean of the ionization energies of the PLA polymer and organic molecules. The application of this new method led to the determination of the dispersive and polar free surface energy of the adsorption of molecules on the polymeric material, as well as the glass transition and the Lewis acid-base constants. Four interval temperatures were distinguished, showing four zones of variations in the surface properties of PLA as a function of the temperature before and after the glass transition. The acid-base parameters of PLA strongly depend on the temperature. The accurate determination of the dispersive and polar surface physicochemical properties of PLA led to the work of adhesion of the polar organic solvents adsorbed on PLA. These results can be very useful for achieving reliable and functional 3D and 4D printed components.
Collapse
Affiliation(s)
- Tayssir Hamieh
- Faculty of Science and Engineering, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands; ; Tel.: +31-6-5723-9324
- Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA), Faculty of Sciences, Lebanese University, Hadath P.O. Box 6573, Lebanon
| |
Collapse
|
2
|
Hamieh T. New Progress on London Dispersive Energy, Polar Surface Interactions, and Lewis's Acid-Base Properties of Solid Surfaces. Molecules 2024; 29:949. [PMID: 38474461 DOI: 10.3390/molecules29050949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/19/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
The determination of the polar surface free energy, polar properties, and Lewis's acid base of solid materials is of capital importance in many industrial processes, such as adhesion, coatings, two-dimensional films, and adsorption phenomena. (1) Background: The physicochemical properties of many solid particles were characterized during the last forty years by using the retention time of injected well-known molecules into chromatographic columns containing the solid substrates to be characterized. The obtained net retention time of the solvents adsorbed on the solid, allowing the determination of the net retention volume directly correlated to the specific surface variables, dispersive, polar, and acid-base properties. (2) Methods: Many chromatographic methods were used to quantify the values of the different specific surface variables of the solids. However, one found a large deviation between the different results. In this paper, one proposed a new method based on the London dispersion equation that allowed the quantification of the polar free energy of adsorption, as well as the Lewis's acid-base constants of many solid surfaces. (3) Results: The newly applied method allowed us to obtain the polar enthalpy and entropy of adsorption of polar model organic molecules on several solid substrates, such as silica, alumina, MgO, ZnO, Zn, TiO2, and carbon fibers. (4) Conclusions: our new method based on the separation between the dispersive and polar free surface energy allowed us to better characterize the solid materials.
Collapse
Affiliation(s)
- Tayssir Hamieh
- Faculty of Science and Engineering, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA), Faculty of Sciences, Lebanese University, Hadath P.O. Box 6573, Lebanon
| |
Collapse
|
3
|
Hamieh T. Some Irregularities in the Evaluation of Surface Parameters of Solid Materials by Inverse Gas Chromatography. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17059-17070. [PMID: 37988601 DOI: 10.1021/acs.langmuir.3c01649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
The London dispersive component of the surface energy of solid particles, their specific interactions, and Lewis acid-base parameters were usually calculated by using the inverse gas chromatography technique at infinite dilution. Serious irregularities were committed by some authors when using the Schultz method or Dorris-Gray relation. We proved that these methods cannot be used because they did not consider the important role of the temperature on variations in the surface area of solvents. We corrected in this paper some recent results by using new relations of the surface area of organic probes depending on the temperature and by using different molecular models using different geometries and mathematical calculations. The application of our new thermal model gave more precise results of the dispersive energy and Lewis's acid-base constants of solid particles. The new thermal model was applied to several solid surfaces such as Ni-MOF-74, MgO, ZnO, TiO2, and Zn(OH)2. The obtained results showed a stronger Lewis basicity of MgO solid substrate and higher Lewis acidity of the Ni-MOF-74 surface.
Collapse
Affiliation(s)
- Tayssir Hamieh
- Faculty of Science and Engineering, Maastricht University, P.O. Box 616, Maastricht 6200 MD, The Netherlands
- Laboratory of Materials, Catalysis, Environment and Analytical Methods Laboratory (MCEMA), Faculty of Sciences, Lebanese University, Hadath, Lebanon
| |
Collapse
|
4
|
Hamieh T. New Methodology to Study the Dispersive Component of the Surface Energy and Acid-Base Properties of Silica Particles by Inverse Gas Chromatography at Infinite Dilution. J Chromatogr Sci 2021; 60:126-142. [PMID: 34096571 DOI: 10.1093/chromsci/bmab066] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Indexed: 11/14/2022]
Abstract
A new methodology was proposed to determine the dispersive component of the surface energy ${\gamma}_s^d$ of a solid taking into account the effect of the temperature on the surface area of n-alkanes, methylene group (${a}_{- CH2-}$) and polar molecules, thus defeating the method used by Dorris-Gray Schultz et al. We determined the correct ${\gamma}_s^d$ of the surface energy, the specific free energy, enthalpy and entropy of adsorption of polar molecules as well as the acid base constants of silica particles with an excellent accuracy. We confirmed the dependence of the dispersive component of the surface energy on the variations of the surface areas of organic molecules used in IGC technique at infinite dilution. The specific properties of interactions of silica particles were determined. The new proposed model took into account this thermal effect. Obtained results proved that the other used IGC methods gave inaccurate values of the specific parameters of silica surface, except for the vapor pressure method that led to excellent results of the specific free energy, enthalpy and entropy of adsorption, and the acid-base constants of the silica particles.
Collapse
Affiliation(s)
- Tayssir Hamieh
- SATIE, IFSTTAR, University Gustave Eiffel, Campus de Marne-La-Vallée, 25, allée des Marronniers, 78000 Versailles, France.,Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA) and LEADDER Laboratory, Faculty of Sciences and EDST, Lebanese University, Hariri Campus, Hadath, P.O. Box 6573/14, Beirut, Lebanon
| |
Collapse
|
5
|
Hamieh T. Study of the temperature effect on the surface area of model organic molecules, the dispersive surface energy and the surface properties of solids by inverse gas chromatography. J Chromatogr A 2020; 1627:461372. [DOI: 10.1016/j.chroma.2020.461372] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 02/04/2023]
|
6
|
Fletcher PDI, Holt BL. Controlled silanization of silica nanoparticles to stabilize foams, climbing films, and liquid marbles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12869-12876. [PMID: 21888342 DOI: 10.1021/la2028725] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe a method for the synthesis of multigram amounts of silica nanoparticles which are controllably hydrophobized to different extents using a room temperature vapor phase silanization process. The extent of hydrophobization of the particles can be adjusted by changing the amount of dichlorodimethylsilane reagent used in the reaction. The method produces particles with good uniformity of surface coating; the silane coating varies from monolayer coverage at low extents of hydrophobization to approximately trilayer at high extents of hydrophobization. Acid-base titration using conductivity detection was used to characterize the extent of hydrophobization which is expressed as the percent of surface silanol groups remaining after silanization. Particles with %SiOH ranging from 100% (most hydrophilic) to 20% (most hydrophobic) were hand shaken with water/methanol mixtures and produced either a particle dispersion, foam, climbing films, or liquid marbles. The type of colloidal structure produced is discussed in terms of the liquid-air-particle contact angle and the energy of adsorption of the particles to the liquid-air surface.
Collapse
Affiliation(s)
- Paul D I Fletcher
- Surfactant & Colloid Group, Department of Chemistry, University of Hull, Hull HU6 7RX United Kingdom.
| | | |
Collapse
|
7
|
Internal structure investigation of pyrogenic modified silica by fluorescent labeling. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.03.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
8
|
Brackett MG, Li N, Brackett WW, Sword RJ, Qi YP, Niu LN, Pucci CR, Dib A, Pashley DH, Tay FR. The critical barrier to progress in dentine bonding with the etch-and-rinse technique. J Dent 2011; 39:238-48. [PMID: 21215788 DOI: 10.1016/j.jdent.2010.12.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 12/04/2010] [Accepted: 12/24/2010] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVES The lack of durability in resin-dentine bonds led to the use of chlorhexidine as MMP-inhibitor to prevent the degradation of hybrid layers. Biomimetic remineralisation is a concept-proven approach in preventing the degradation of resin-dentine bonds. The purpose of this study is to examine the integrity of aged resin-dentine interfaces created with a nanofiller-containing etch-and-rinse adhesive after the application of these two approaches. METHODS The more established MMP-inhibition approach was examined using a parallel in vivo and in vitro ageing design to facilitate comparison with the biomimetic remineralisation approach using an in vitro ageing design. Specimens bonded without chlorhexidine exhibited extensive degradation of the hybrid layer after 12 months of in vivo ageing. RESULTS Dissolution of nanofillers could be seen within a water-rich zone within the adhesive layer. Although specimens bonded with chlorhexidine exhibited intact hybrid layers, water-rich regions remained in those hybrid layers and degradation of nanofillers occurred within the adhesive layer. Specimens subjected to in vitro biomimetic remineralisation followed by in vitro ageing demonstrated intrafibrillar collagen remineralisation within hybrid layers and deposition of mineral nanocrystals in nanovoids within the adhesive. CONCLUSIONS The impact was realized by understanding the lack of an inherent mechanism to remove water from resin-dentine interfaces as the critical barrier to progress in bonding with the etch-and-rinse technique. The experimental biomimetic remineralisation strategy offers a creative solution for incorporating a progressive hydration mechanism to achieve this goal, which warrants its translation into a clinically applicable technique.
Collapse
Affiliation(s)
- M G Brackett
- Department of Oral Rehabilitation, School of Dentistry, Medical College of Georgia, Augusta, GA, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Akoum RA, Vaulot C, Schwartz D, Hirn MP, Haidar B. How silanization of silica particles affects the adsorption of PDMS chains on its surface. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22130] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
10
|
Influence of specific surface area of pyrogenic silicas on their heat of immersion in water and on their surface properties assessed using inverse gas chromatography. J Colloid Interface Sci 2008; 328:15-9. [DOI: 10.1016/j.jcis.2008.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2008] [Revised: 09/01/2008] [Accepted: 09/03/2008] [Indexed: 11/20/2022]
|
11
|
Ridaoui H, Donnet JB, Balard H, Kellou H, Hamdi B, Barthel H, Gottschalk-Gaudig T, Legrand AP. Silane modified fumed silicas and their behaviours in water: Influence of grafting ratio and temperature. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.07.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
12
|
Kellou H, Hamdi B, Brendlé E, Gottschalk-Gaudig T, Barthel H, Ridaoui H, Balard H, Donnet JB. Surface properties of dimethylsilylated silicas, assessed using IGC at finite concentration. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|