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Christ B, Glaubitt W, Berberich K, Weigel T, Probst J, Sextl G, Dembski S. Sol-Gel-Derived Fibers Based on Amorphous α-Hydroxy-Carboxylate-Modified Titanium(IV) Oxide as a 3-Dimensional Scaffold. MATERIALS 2022; 15:ma15082752. [PMID: 35454448 PMCID: PMC9024846 DOI: 10.3390/ma15082752] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/01/2022] [Accepted: 04/06/2022] [Indexed: 12/02/2022]
Abstract
The development of novel fibrous biomaterials and further processing of medical devices is still challenging. For instance, titanium(IV) oxide is a well-established biocompatible material, and the synthesis of TiOx particles and coatings via the sol-gel process has frequently been published. However, synthesis protocols of sol-gel-derived TiOx fibers are hardly known. In this publication, the authors present a synthesis and fabrication of purely sol-gel-derived TiOx fiber fleeces starting from the liquid sol-gel precursor titanium ethylate (TEOT). Here, the α-hydroxy-carboxylic acid lactic acid (LA) was used as a chelating ligand to reduce the reactivity towards hydrolysis of TEOT enabling a spinnable sol. The resulting fibers were processed into a non-woven fleece, characterized with FTIR, 13C-MAS-NMR, XRD, and screened with regard to their stability in physiological solution. They revealed an unexpected dependency between the LA content and the dissolution behavior. Finally, in vitro cell culture experiments proved their potential suitability as an open-mesh structured scaffold material, even for challenging applications such as therapeutic medicinal products (ATMPs).
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Affiliation(s)
- Bastian Christ
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Correspondence:
| | - Walther Glaubitt
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Katrin Berberich
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Tobias Weigel
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Jörn Probst
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
| | - Gerhard Sextl
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Department Chemical Technology of Material Synthesis, University Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Sofia Dembski
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies TLC-RT, Neunerplatz 2, 97082 Würzburg, Germany; (W.G.); (K.B.); (T.W.); (J.P.); (G.S.); (S.D.)
- Department Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany
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Nada H, Kobayashi M, Kakihana M. Anisotropy in Stable Conformations of Hydroxylate Ions between the {001} and {110} Planes of TiO 2 Rutile Crystals for Glycolate, Lactate, and 2-Hydroxybutyrate Ions Studied by Metadynamics Method. ACS OMEGA 2019; 4:11014-11024. [PMID: 31460199 PMCID: PMC6648721 DOI: 10.1021/acsomega.9b01100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/11/2019] [Indexed: 06/10/2023]
Abstract
Control over TiO2 rutile crystal growth and morphology using additives is essential for the development of functional materials. Computer simulation studies on the thermodynamically stable conformations of additives at the surfaces of rutile crystals contribute to understanding the mechanisms underlying this control. In this study, a metadynamics method was combined with molecular dynamics simulations to investigate the thermodynamically stable conformations of glycolate, lactate, and 2-hydroxybutyrate ions at the {001} and {110} planes of rutile crystals. Two simple atom-atom distances were selected as collective variables for the metadynamics method. At the {001} plane, a conformation in which the COO- group was oriented toward the surface was found to be the most stable for the lactate and 2-hydroxybutyrate ions, whereas a conformation in which the COO- group was oriented toward water was the most stable for the glycolate ion. At the {110} plane, a conformation in which the COO- group was oriented toward the surface was the most stable for all three hydroxylate ions, and a second most stable conformation was also observed for the lactate ion at positions close to the {110} plane. For all three hydroxylate ions (α-hydroxycarboxylate ions), the stability of the most stable conformation was higher for the {110} plane than for the {001} plane. At both planes, the stability of the most stable conformation was highest for the 2-hydroxybutyrate ion and lowest for the glycolate ion. Supposing that all three hydroxylate ions serve to decrease the surface free energy at the rutile surface and that a more stable conformation at the rutile surface leads to a greater decrease in the surface free energy, the present results partially explain experimentally observed differences in the changes in growth rate and morphology of rutile crystals in the presence of glycolic, lactic, and 2-hydroxybutyric acids.
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Affiliation(s)
- Hiroki Nada
- National
Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan
| | - Makoto Kobayashi
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Masato Kakihana
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Fandos R, Hernández C, Otero A, Pacheco J, Rodríguez AM, Ruiz MJ, Organero JÁ. Experimental and Theoretical Studies on the Reactivity of Titanium Chelidamate Complexes: the Significant Role of the Hydroxide Pyridine Moiety. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00209] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rosa Fandos
- Universidad de Castilla-La Mancha, Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Facultad de Ciencias del Medio Ambiente, Avda. Carlos III, s/n, 45071 Toledo, Spain
| | - Carolina Hernández
- Universidad de Castilla-La Mancha, Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Facultad de Ciencias del Medio Ambiente, Avda. Carlos III, s/n, 45071 Toledo, Spain
| | - Antonio Otero
- Universidad de Castilla-La Mancha, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas Químicas, Avda. Camilo José Cela, 10, 13071 Ciudad Real, Spain
| | - Janira Pacheco
- Universidad de Castilla-La Mancha, Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Facultad de Ciencias del Medio Ambiente, Avda. Carlos III, s/n, 45071 Toledo, Spain
| | - Ana M. Rodríguez
- Universidad de Castilla-La Mancha, ETS Ingenieros Industriales, Campus de Ciudad
Real, Avda. Camilo José Cela, 3, 13071 Ciudad Real, Spain
| | - María José Ruiz
- Universidad de Castilla-La Mancha, Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Facultad de Ciencias del Medio Ambiente, Avda. Carlos III, s/n, 45071 Toledo, Spain
| | - Juan Ángel Organero
- Universidad de Castilla-La Mancha, Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Facultad de Ciencias del Medio Ambiente, Avda. Carlos III, s/n, 45071 Toledo, Spain
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Watté J, Van Gompel W, Lommens P, De Buysser K, Van Driessche I. Titania Nanocrystal Surface Functionalization through Silane Chemistry for Low Temperature Deposition on Polymers. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29759-29769. [PMID: 27734676 DOI: 10.1021/acsami.6b08931] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A method to obtain photocatalytically active thin films of anatase nanocrystals on polymer substrates was explored. Anatase nanocrystals were synthesized by a fast hydrolysis synthesis in an apolar solvent and characterized with regard to their crystallinity, size, and dispersibility and the stability of the resulting suspensions. The stable titania nanocrystal suspensions were further processed for their use in polar solvents using ligand exchange. Oleic acid was exchanged for 3-aminopropyltriethoxysilane (APTES), resulting in aqueous suspensions of charge-stabilized nanocrystals. These were adapted for use as coating suspensions for surface-treated PMMA substrates in order to obtain thin films containing anatase nanocrystals covalently coupled to the surface of the PMMA substrates. Thereby, the ligand exchange was beneficial for increasing the compatibility and durability of the inorganic/organic composite, by the formation of a covalent amide bond between the silane ligands on the nanocrystals and the carboxylic acid groups on the polymer substrate. The surface morphology, transparency, and photocatalytic activity toward the degradation of organic pollutants of the coatings, obtained through dip-coating, were evaluated.
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Affiliation(s)
- Jonathan Watté
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University , Krijgslaan 281-S3, 9000 Gent, Belgium
| | - Wouter Van Gompel
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University , Krijgslaan 281-S3, 9000 Gent, Belgium
| | - Petra Lommens
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University , Krijgslaan 281-S3, 9000 Gent, Belgium
| | - Klaartje De Buysser
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University , Krijgslaan 281-S3, 9000 Gent, Belgium
| | - Isabel Van Driessche
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University , Krijgslaan 281-S3, 9000 Gent, Belgium
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