scholarly journals Sol-Gel Synthesis of Water-Soluble Polysilsesquioxanes with Regular Structures

2010 ◽  
Vol 67 (5) ◽  
pp. 280-287 ◽  
Author(s):  
Yoshiro KANEKO ◽  
Nobuo IYI
Keyword(s):  
Sol Gel ◽  
Water Soluble ◽  
Regular Structures ◽  
Sol Gel Synthesis

Features of silicon– and titanium–polyethylene glycol precursors in sol–gel synthesis of new hydrogels

2015 ◽  
Vol 3 (27) ◽  
pp. 5490-5500 ◽  
Author(s):  
T. G. Khonina ◽  
A. P. Safronov ◽  
M. V. Ivanenko ◽  
E. V. Shadrina ◽  
O. N. Chupakhin
Keyword(s):  
Polyethylene Glycol ◽  
Sol Gel ◽  
Water Soluble ◽  
Sol Gel Synthesis ◽  
Gel Processing

The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol–gel processing, was investigated.

scholarly journals Preparation and Structural Characterization of Complex Oxide Eutectic Precursors from Polymer–Salt Xerogels Obtained by Microwave-Assisted Drying

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1808
Author(s):  
Maria Vartanyan ◽  
Ilya Voytovich ◽  
Irina Gorbunova ◽  
Nikolay Makarov
Keyword(s):  
Sol Gel ◽  
Polymer Surface ◽  
Ternary Systems ◽  
Complex Oxide ◽  
Water Soluble ◽  
Microwave Assisted ◽  
Composition And Structure ◽  
Convective Process ◽  
Drying Conditions ◽  
Sol Gel Synthesis

Sol–gel synthesis is an acknowledged method for obtaining fine inorganic powders of a different nature. Implementation of water-soluble polymers as gel-forming media makes this technique even more readily available, especially in cases where conventional gel formation is suppressed. In polymer–salt solutions, polymers serve as scaffolds for salt constituents’ bulk crystallization. When dried, solid salt particles are deposited on the polymer surface or in polymer matrix pores, which leads to higher grain size uniformity. The present work discusses the effect of drying conditions on phase composition and structure characteristics of complex oxide eutectics in ternary systems, CaO–Al2O3–Y2O3 (CAY) and MgO–Al2O3–Y2O3 (MAY), obtained from polymer–salt compositions based on polyvinyl alcohol (PVA), Na-salt of carboxymethylcellulose (Na-CMC) or polyvinylpyrrolidone (PVP). Microwave-assisted drying proved to be more efficient compared to convective process; however such technique requires careful selection of gel-forming polymer.

Particle Size Control in Sol-Gel Synthesis of Nano Hydroxyapatite

2006 ◽  
Vol 11-12 ◽  
pp. 231-234 ◽  
Author(s):  
Lei Yang ◽  
Xiao Shan Ning ◽  
W.W. Jia ◽  
Ke Xin Chen ◽  
He Ping Zhou
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Size Control ◽  
Soluble Starch ◽  
Water Soluble ◽  
Ammonium Citrate ◽  
Obvious Effect ◽  
Control Techniques ◽  
Particle Size Control ◽  
Sol Gel Synthesis

Sol-gel method is one of the most potential techniques for mass-production of nano hydroxyapatite. In this paper, particle size control techniques, including dripping speed control, addition of several dispersants such as ammonium citrate, castor oil and silane coupling agent, as well as usage of insoluble and water soluble starch additives, were investigated. The particle size and microstructures of as synthesized hydroxyapatite were studied by X-ray diffraction, Scanning electron microscopy and dynamic light scattering. The results indicated that all the control techniques had considerable effects on decreasing the crystallite size, and the starch additives also exhibited obvious effect on preventing the agglomeration of nano crystallites during the synthesizing process.

scholarly journals Influence of Aloe vera and Pluronic F127 on the Enhancement of Photocatalytic Degradation and Antibacterial Activity of ZnO by sol-gel Synthesis Method

2021 ◽  
Author(s):  
Seifunnisha O ◽  
Shanthi J
Keyword(s):  
Antibacterial Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Synthesis Method ◽  
Aloe Vera ◽  
Water Soluble ◽  
Minimum Time ◽  
Pluronic F127 ◽  
Textile Dye ◽  
Sol Gel Synthesis

Abstract The development of plant-based photocatalyst with a minimum time of irradiation for water-soluble dye disposal from industries is a great significance to unravel water pollution. In the present work, the sol-gel synthesis method was employed for the synthesis of zinc oxide nanoparticles using Pluronic F127 and Aloe vera as dispersing media. A hexagonal wurtzite structure and surface morphology confirmed by XRD and FE-SEM analysis. The infrared study was applied to substantiate the acceptable compounds within the nanoparticles and phytochemicals presence within the extract. From the DRS spectra, Bandgap energy of ZnO nanoparticles (3.22eV) was decreased to 2.89eV by blending of Aloe vera and Pluronic F127 into ZnO. The photocatalytic action of different combinations of ZnO was examined against malachite green dye under UV light and visible light irradiation. Upto 95% degradation was achieved for ZnO/Aloe/PF127 with a minimum time of UV light exposure. All combinations of ZnO showed effective bactericidal activity against multi-drug resistance of E.coli, S.aureus, B.subtilis, and P.aeruginosa. These findings proved the overwhelming photocatalytic and antibacterial activity of ZnO samples, which might be used as effective remediation to treat textile dye wastewater.

Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Houbertz ◽  
J. Schulz ◽  
L. Fröhlich ◽  
G. Domann ◽  
M. Popall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Sol Gel ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hybrid Polymer ◽  
Organic Hybrid ◽  
Two Photon ◽  
Applied Technology ◽  
Scale Structures ◽  
Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

Sol-Gel Synthesis, Structure and Optical Properties of Nickel-Manganese Ferrites

2019 ◽  
Vol 11 (3) ◽  
pp. 03021-1-03021-5
Author(s):  
V. S. Bushkova ◽  
◽  
I. P. Yaremiy ◽  
B. K. Ostafiychuk ◽  
N. I. Riznychuk ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Sol Gel Synthesis ◽  
Nickel Manganese

Sol-Gel Synthesis of Nano-Scale, End-Member Albite Feldspar (NaAlSi3O8)

2021 ◽  
Author(s):  
L.M. Anovitz ◽  
A. Affolter ◽  
M.C. Cheshire ◽  
A.J. Rondinone ◽  
Lawrence F. Allard
Keyword(s):  
Sol Gel ◽  
Nano Scale ◽  
Sol Gel Synthesis
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