Structural and thermal properties of monolithic silica–phosphate (SiO2–P2O5) gel glasses prepared by sol–gel technique

In this paper, epoxy/SiO2 hybrid coating was successfully prepared through sol-gel technique, the structure and thermal properties of epoxy/SiO2hybrid coating were investigated. First, γ-isocyanatopropyltriethoxysilane “(KBE-9007)” was used to modify the epoxy resin so that the ethoxysilane could be grafted on the epoxy resin. Nano-SiO2 precursor was synthesized by tetraethoxysilane(TEOS) through sol-gel technique. Then the modified epoxy resin and the nano-SiO2 precursor were mixed for 4 hours to let the macromolecules of epoxy resin graft on the surface of nano-SiO2, and modified nano-SiO2 precursor was obtained. At last, epoxy/SiO2 hybrid coating was produced by using the modified nano-SiO2 precursor. The graft reaction was confirmed by the analyses of FT-IR. The analyses of XPS indicated that there are lots of SiO2 particles and Si-C covalent bonds on the surface of epoxy/SiO2 hybrid coating, they also suggested that most TEOS had changed into SiO2 particles and Si-C covalent bond had been formed between epoxy resin and SiO2. The analyses of SEM fracture surface image of epoxy/SiO2 hybrid coating showed that SiO2 particles dispersed in epoxy matrix homogeneously and the size of the particles was between 50nm and 100 nm. Thermoanalysis Instrument was employed to detect the thermal properties of epoxy coating and epoxy/SiO2 hybrid coating, the results indicated that the thermal decomposition temperature of epoxy/SiO2 hybrid coating is 21.7 °C higher than that of epoxy coating, the thermal properties of the epoxy/SiO2 hybrid coating were improved because of the introduction of nano-SiO2.

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Structural, Optical, Morphological and Thermal Properties of CuO Nanoparticles Prepared by Sol-gel Technique

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.11(5).05011 ◽

2019 ◽

Vol 11 (5) ◽

pp. 05011-1-05011-4

Author(s):

S. C. Vella Durai ◽

◽

R. Ganapathi Raman ◽

E. Kumar ◽

D. Muthuraj ◽

...

Keyword(s):

Thermal Properties ◽

Sol Gel ◽

Cuo Nanoparticles ◽

Gel Technique

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Annealing effect on the microstructural, optical, electrical, and thermal properties of Cu2O/TiO2/Cu2O/TiO2/Si heterojunction prepared by sol-gel technique

Superlattices and Microstructures ◽

10.1016/j.spmi.2021.107119 ◽

2021 ◽

pp. 107119

Author(s):

Taher Ghrib ◽

Nouf K. AL-Saleem ◽

Aishah AL-Naghmaish ◽

Abdelhafeez A. Elshekhipy ◽

Sami Brini ◽

...

Keyword(s):

Thermal Properties ◽

Sol Gel ◽

Annealing Effect ◽

Gel Technique

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TEM visualization of surface replicated acid and base catalyzed sol-gel glasses

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010014381x ◽

1986 ◽

Vol 44 ◽

pp. 448-449

Author(s):

George C. Ruben ◽

Merrill W. Shafer

Keyword(s):

Elevated Temperatures ◽

Sol Gel ◽

Basic Medium ◽

Glass Transition Point ◽

Structural Space ◽

Acid And Base ◽

Organometallic Precursors ◽

New Processing ◽

Gel Glasses ◽

Physical Phenomena

Traditionally ceramics have been shaped from powders and densified at temperatures close to their liquid point. New processing methods using various types of sols, gels, and organometallic precursors at low temperature which enable densificatlon at elevated temperatures well below their liquidus, hold the promise of producing ceramics and glasses of controlled and reproducible properties that are highly reliable for electronic, structural, space or medical applications. Ultrastructure processing of silicon alkoxides in acid medium and mixtures of Ludox HS-40 (120Å spheres from DuPont) and Kasil (38% K2O &62% SiO2) in basic medium have been aimed at producing materials with a range of well defined pore sizes (∼20-400Å) to study physical phenomena and materials behavior in well characterized confined geometries. We have studied Pt/C surface replicas of some of these porous sol-gels prepared at temperatures below their glass transition point.

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Preparation and Deposition of Hydroxyapatite on Biomaterials by Sol-Gel Technique-A Review

Chitkara Chemistry Review ◽

10.15415/ccr.2013.12011 ◽

2013 ◽

Vol 1 (2) ◽

pp. 59-69 ◽

Cited By ~ 6

Author(s):

Sarbjit Kaur ◽

Niraj Bala ◽

Charu Khosla

Keyword(s):

Sol Gel ◽

Gel Technique

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Sol - Gel Technique Applied for Biomaterials Achievement

Recent Patents on Materials Science ◽

10.2174/1874464811104030224 ◽

2011 ◽

Vol 4 (3) ◽

pp. 224-237 ◽

Cited By ~ 3

Author(s):

Aurica P. Chiriac ◽

Loredana E. Nita ◽

Iordana Neamtu ◽

Manuela T. Nistor

Keyword(s):

Sol Gel ◽

Gel Technique

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Effect of alkali metal (Na, K) ion ratio on structural, optical and photoluminescence properties of K0.5Na0.5NbO3 ceramics prepared by sol–gel technique

Bulletin of Materials Science ◽

10.1007/s12034-020-02341-x ◽

2021 ◽

Vol 44 (1) ◽

Author(s):

SHAMMI KUMAR ◽

NAGESH THAKUR

Keyword(s):

Alkali Metal ◽

Sol Gel ◽

Photoluminescence Properties ◽

Gel Technique

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Tailoring Mesoporous Titania Features by Ultrasound-Assisted Sol-Gel Technique: Effect of Surfactant/Titania Precursor Weight Ratio

Nanomaterials ◽

10.3390/nano11051263 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1263

Author(s):

Elvira Mahu ◽

Cristina Giorgiana Coromelci ◽

Doina Lutic ◽

Iuliean Vasile Asaftei ◽

Liviu Sacarescu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Sol Gel ◽

Weight Ratio ◽

Soft Template ◽

Synthesis Process ◽

Mesoporous Titania ◽

Cavitation Effect ◽

Titania Precursor ◽

Gel Technique ◽

Ultrasound Assisted

A mesoporous titania structure has been prepared using the ultrasound-assisted sol-gel technique in order to find out a way to tailor its structure. The TiO2 obtained was compared to the same version of titania but synthesized by a conventional sol-gel method with the objective of understanding the effect of ultrasound in the synthesis process. All synthesis experiments were focused on the preparation of a titania photocatalyst. Thus, the anatase photocatalytic active phase of titania was proven by X-ray diffraction. Additionally, the ultrasonation treatment proved to increase the crystallinity of titania samples, being one of the requirements to having good photocatalytic activity for titania. The influence of surfactant/titania precursor weight ratio on the structural (XRD), textural (N2-sorption measurements), morphological (TEM), surface chemistry (FTIR) and optical properties (UVDR) was investigated. It was observed that the crystallite size, specific surface area, band gap energy and even photocatalytic activity was affected by the synergism occurring between cavitation effect and the surfactant/titania precursor weight ratio. The study yielded interesting great results that could be considered for further application of ultrasound to tailor mesoporous titania features via sol-gel soft template synthesis, against conventional sol-gel process.

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