Sol–gel hybrid materials for aerospace applications: Chemical characterization and comparative investigation of the magnetic properties

Catauro, Michelina; Mozzati, Maria Cristina; Bollino, Flavia

doi:10.1016/j.actaastro.2015.08.003

Cited by 25 publications

(15 citation statements)

References 59 publications

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“…Elsewhere, Catauro et al proposed the use of organic/inorganic hybrid materials based on zirconia (ZrO 2 ), with different percentages of PCL embedded, for biomedical applications [ 28 ]. These materials were extensively characterized [ 29 ]. The presence of hydrogen bonds between the carboxylic groups of the polymer and the hydroxyl groups of the inorganic matrix was proved by Fourier transform infrared (FTIR) analysis, and is strongly supported by solid-state NMR [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Polymer Amount on the Biological Properties of PCL/ZrO2 Hybrid Materials Synthesized via Sol-Gel Technique

et al. 2017

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Organic/inorganic hybrid materials are attracting considerable attention in the biomedical area. The sol-gel process provides a convenient way to produce many bioactive organic–inorganic hybrids. Among those, poly(e-caprolactone)/zirconia (PCL/ZrO2) hybrids have proved to be bioactive with no toxic materials. The aim of this study was to investigate the effects of these materials on the cellular response as a function of the PCL content, in order to evaluate their potential use in the biomedical field. For this purpose, PCL/ZrO2 hybrids containing 6, 12, 24, and 50 wt % of PCL were synthesized by the sol-gel method. The effects of their presence on the NIH-3T3 fibroblast cell line carrying out direct cell number counting, MTT, cell damage assays, flow cytometry-based analysis of cell-cycle progression, and immunoblotting experiments. The results confirm and extend the findings that PCL/ZrO2 hybrids are free from toxicity. The hybrids containing 12 and 24 wt % PCL, (more than 6 and 50 wt % ones) enhance cell proliferation when compared to pure ZrO2 by affecting cell cycle progression. The finding that the content of PCL in PCL/ZrO2 hybrids differently supports cell proliferation suggests that PCL/ZrO2 hybrids could be useful tools with different potential clinical applications.

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Section: Introductionmentioning

confidence: 99%

The Influence of the Polymer Amount on the Biological Properties of PCL/ZrO2 Hybrid Materials Synthesized via Sol-Gel Technique

et al. 2017

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“…4). The acquired spectra were compared to those obtained elsewhere [12,14,23] for quercetin, PEG, silica/quercetin and silica/PEG based materials. Pure quercetin and PEG vibration bands were assigned by comparing the absorption frequencies with values reported in the literature [24,25].…”

Section: Characterization Of the Synthesized Materialsmentioning

confidence: 99%

“…Analogously, the typical aromatic vibrations of the flavonol were differently displaced by about 16-19 cm −1 each (1610 cm − 1 → 1628 cm −1 ; 1560 cm −1 → 1541 cm −1 ; 1458 cm −1 → 1474 cm −1 ). Furthermore, hybrid spectra clearly showed Si\ \O\ \Si and Si\ \OH vibration bands at 1080 and 465 cm − 1 , and 948 cm −1 , respectively [23,[28][29][30][31][32] due to the SiO 2 inorganic matrix.…”

Section: Characterization Of the Synthesized Materialsmentioning

confidence: 99%

Entrapping quercetin in silica/polyethylene glycol hybrid materials: Chemical characterization and biocompatibility

Catauro

Bollino

Nocera

et al. 2016

Materials Science and Engineering: C

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“…A typical in situ sol-gel condensation procedure 23,30 was pursued for the synthesis of hybrids materials (Scheme 2). To different amounts of oxazoline copolymer ranging from 0.015 to 0.060 g (A: 0.015 g, 3.5e-3 mmol; B: 0.030 g, 7.1e-3 mmol, C: 0.033 g, 7.8e-3 mmol; D: 0.035 g, 8.3e-3 mmol; E:0.040 g, 9.5e-3 mmol; F: 0.042 g, 1.0e-2 mmol; G: 0.045 g, 1.1e-2 mmol, and H:-0.060 g, 1.4e-2 mmol), a constant amount of tetramethyoxysilane (TMOS; 0.38 g, 2.5 mmol) was added (Table II).…”

Section: Synthesis Of Organic-inorganic Hybrids Materialsmentioning

confidence: 99%

“…As an alternative, one such class of thermo-responsive polymer is poly-(2-oxazolines) (POxs), 13-16 some of which are nontoxic in nature, as approved by Food and Drug Administration (FDA). 1,[21][22][23][24][25][26][27][28] In the present study, thermoresponsive behavior of organicinorganic hybrid materials including copolymer of 2-ethyl-2-oxazoline and 2-isopropyl-2-oxazoline was investigated. The structure of generally used 2-alkyl-2-oxaoline derivatives for polymerization is depicted in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Fine‐tuning of phase behavior of oxazoline copolymer‐based organic–inorganic hybrids as solid‐supported sol–gel materials

Gupta

Kataoka

Watanabe

et al. 2019

J of Applied Polymer Sci

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Silica-supported organic-inorganic polymer hybrids were synthesized via in situ sol-gel condensation of silica monomer in the presence of oxazoline copolymer. A stable copolymer of 2-ethyl-2-oxaoline and 2-isopropyl-2-oxazoline was prepared using methyl p-tosylate as the living polymerization initiator with molecular mass of 4200 g mol −1 . Lower critical solution temperature (LCST) of this copolymer was thermally found to be at 77 C. The copolymer was mixed with tetramethoxysilane (TMOS) in different amounts (0.039:1 to 0.158:1 weight ratios) via in situ sol-gel condensation to produce organic-inorganic hybrids including thermosensitive copolymer. Tuning of these solid-supported materials showed sharp phase transitions changes in a temperature range from 42 to 58 C, which was confirmed using differential scanning calorimetry. Enthalpy of the phase transition was also calculated using the area above the endothermic peak. A typical concave curve was obtained for LCST-type phase diagram suggesting the dependence of phase transition temperature on the concentration of the copolymer in the hybrid.

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Sol–gel hybrid materials for aerospace applications: Chemical characterization and comparative investigation of the magnetic properties

Cited by 25 publications

References 59 publications

The Influence of the Polymer Amount on the Biological Properties of PCL/ZrO2 Hybrid Materials Synthesized via Sol-Gel Technique

The Influence of the Polymer Amount on the Biological Properties of PCL/ZrO2 Hybrid Materials Synthesized via Sol-Gel Technique

Entrapping quercetin in silica/polyethylene glycol hybrid materials: Chemical characterization and biocompatibility

Fine‐tuning of phase behavior of oxazoline copolymer‐based organic–inorganic hybrids as solid‐supported sol–gel materials

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