scholarly journals Fast Curable Polysiloxane-Silphenylene Hybrimer with High Transparency and Refractive Index for Optical Applications

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 515
Author(s):  
Kyungkuk Koh ◽  
Honglae Sohn
Keyword(s):  
Refractive Index ◽  
Thermal Aging ◽  
Sol Gel ◽  
Optical Transmittance ◽  
High Refractive Index ◽  
Temperature Treatment ◽  
Pt Catalyst ◽  
High Temperature Treatment ◽  
High Transparency ◽  
Optical Applications

In this study, a fast curable polysiloxane-silphenylene hybrimer (PSH) was synthesized by the nonhydrolytic sol–gel condensation of phenyl-vinyl-oligosiloxane (PVO) and tris(dimethylhydrosilyl)benzene (TDMSB) under a Pt catalyst to investigate its optical property and thermal stability. The combination of PVO and tripod-type TDMSB results in a hybrimer with a fast curing time of 30 min. The PSH exhibited a high refractive index of 1.60, 1.59, and 1.58 at 450, 520, and 635 nm, respectively. High transmittance of 97% at 450 nm was obtained. The PSH exhibited a very high transmittance of 97% before thermal aging. The high optical transmittance of the PSH was only slightly decreased by 0.5% of the transmittance at 180 °C for 72 h after thermal aging, and high transparency was maintained almost constant even after 72 h of high-temperature treatment.

Thermally stable transparent sol–gel based active siloxane–oligomer materials with tunable high refractive index and dual reactive groups

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 70825-70831 ◽  
Author(s):  
Mei Chen ◽  
Guoyan Zhang ◽  
Xiao Liang ◽  
Wanshu Zhang ◽  
Le Zhou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index ◽  
Thermally Stable ◽  
Transparent Film ◽  
Reactive Groups ◽  
Optical Applications

A novel active silicone–oligomers used as chemical intermediates in optical applications were synthesized and one of their derivatives, a transparent film with high refractive index, were presented.

scholarly journals Nanocrystalline composites in TiO2 and SnO2 system for ammonia resistance sensors

2018 ◽  
Vol 12 (3) ◽  
pp. 240-247
Author(s):  
Anna Szczygielska ◽  
Zbigniew Pędzich ◽  
Wojciech Maziarz
Keyword(s):  
Phase Composition ◽  
Sol Gel ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Medium Size ◽  
X Ray Diffraction ◽  
Nanocrystalline Tio2 ◽  
Tio2 Anatase ◽  
Transmission Electron ◽  
Sorption Method

This work describes the production of nanocrystalline TiO2 and SnO2 oxides, as well as their nanocomposites (containing 26.9, 58.7 and 79.0wt.% of SnO2) with two-stage sol-gel method combined with high temperature treatment. The phase composition and medium size crystallites were determined using X-ray diffraction analysis (XRD) and revealed that the nanocomposites crystallize in tetragonal structures of TiO2 - anatase and SnO2 - cassiterite. Specific surface area of the nanopowders, measured using sorption method (BET), changed from 42.1 to 160.8m2/g. The morphology of the nanopowders was observed using transmission electron microscope (TEM). As indicated by TEM images, the manufactured nanopowders were well crystallized and consisted of small, spherical grains. The obtained nanopowders were also tested for NH3 gas detection application. The presented method of nanopowders synthesis enables to obtain nanocrystalline TiO2 and SnO2 oxides, as well as composites from TiO2-SnO2 of known and controlled chemical and phase composition. It also enables to obtain composites used for gas sensors. The sensor made of composite containing 58.7wt.% of SnO2 exhibited the best NH3 sensing features.

Sol–Gel Derived Transparent Zirconium-Phenyl Siloxane Hybrid for Robust High Refractive Index LED Encapsulant

2014 ◽  
Vol 6 (5) ◽  
pp. 3115-3121 ◽  
Author(s):  
Yong Ho Kim ◽  
Jun-Young Bae ◽  
Jungho Jin ◽  
Byeong-Soo Bae
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index

Poly(phenylene thioether)s with Fluorene-Based Cardo Structure toward High Transparency, High Refractive Index, and Low Birefringence

2016 ◽  
Vol 49 (16) ◽  
pp. 5849-5856 ◽  
Author(s):  
Kazuhiro Nakabayashi ◽  
Takayuki Imai ◽  
Mao-Chun Fu ◽  
Shinji Ando ◽  
Tomoya Higashihara ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
High Transparency

scholarly journals Hybrid zirconium sol-gel thin films with high refractive index

2011 ◽  
Author(s):  
Arnaud Gorin ◽  
Robert Copperwhite ◽  
Salem Elmaghrum ◽  
Colette McDonagh ◽  
Mohamed Oubaha
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index

Sulfur containing optical plastics and its ophthalmic lenses applications

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
G. S. Jha ◽  
G. Seshadri ◽  
A. Mohan ◽  
R. K. Khandal
Keyword(s):  
Refractive Index ◽  
Fiber Optics ◽  
High Refractive Index ◽  
Linear Optics ◽  
Non Linear Optics ◽  
Plastic Materials ◽  
Different Types ◽  
Optical Applications ◽  
Sulfur Containing ◽  
Optical Plastics

AbstractPlastics produced from the sulfur-based monomer are excellent materials with many optical applications such as ophthalmic lenses, fiber optics and non- linear optics. High refractive index plastic materials are able to reduce the curvature, edge and center thickness of lenses. Sulfur containing plastics such as sulfide, polysulfide, and sulfur containing vinyl compound, thioacrylate, polythiol and isocyanate/isothiocyanate based monomers have demonstrated high refractive index, high Abbe number, good impact strength, excellent machinability, good tintability and good transmittance. In the present article, various sulfur containing plastics with different types of monomers for ophthalmic lens applications are reviewed.

Characterisation of a Gold Nanorod Sol–Gel Utilising Inter-particle Coupling to Yield High Refractive Index Sensitivity

Plasmonics ◽  
2011 ◽  
Vol 7 (2) ◽  
pp. 331-339
Author(s):  
Philip J. R. Roche ◽  
Maurice Cha-Kiu Cheung ◽  
Sandrine Filion-Côté ◽  
Jonathan Milette ◽  
Timothy Gonzalez ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index ◽  
Gold Nanorod ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity
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