Structural and Optical Characterisation of an Erbium/Ytterbium Doped Hybrid Material Developed via a Nonhydrolytic Sol-Gel Route

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
M. Oubaha ◽  
R. Copperwhite ◽  
C. McDonagh ◽  
P. Etienne ◽  
B. D. MacCraith
Keyword(s):  
Hybrid Material ◽  
Sol Gel

scholarly journals Preparation and Characteristics of an Environmentally Friendly Hyperbranched Flame-Retardant Polyurethane Hybrid Containing Nitrogen, Phosphorus, and Silicon

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 720 ◽  
Author(s):  
Chen ◽  
Chiang
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Hybrid Material ◽  
Functional Group ◽  
Condensation Reaction ◽  
Sol Gel ◽  
Decomposition Temperature ◽  
Limiting Oxygen Index ◽  
Raman Analysis ◽  
Ring Opening Reaction

The NCO functional group of 3-isocyanatoproplytriethoxysilane (IPTS) and the OH functional group of 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phospha-phenantbrene-10-oxide (DOPO-BQ) were used to conduct an addition reaction. Following completion of the reaction, triglycidyl isocyanurate (TGIC) was introduced to conduct a ring-opening reaction. Subsequently, a sol–gel method was used to initiate a hydrolysis–condensation reaction on TGIC–IPTS–DOPO-BQ to form a hyperbranched nitrogen–phosphorous–silicon (HBNPSi) flame retardant. This flame retardant was incorporated into a polyurethane (PU) matrix to prepare a hybrid material. Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), limiting oxygen index (LOI), UV-VIS spectrophotometry, and Raman analysis were conducted to characterize the structure and analyze the transparency, thermal stability, flame retardancy, and residual char to understand the flame retardant mechanism of the prepared hybrid material. After the flame retardant was added, the maximum degradation rate decreased from −36 to −17 wt.%/min, the integral procedural decomposition temperature (IPDT) increased from 348 to 488 °C, and the char yield increased from 0.7 to 8.1 wt.%. The aforementioned results verified that the thermal stability of PU can be improved after adding HBNPSi. The LOI analysis indicated that the pristine PU was flammable because the LOI of pristine PU was only 19. When the content of added HBNPSi was 40%, the LOI value was 26; thus the PU hybrid became nonflammable.

Design and Simulation of 2×2 MMI Coupler and Thermo-optic Switch Using Sol-Gel Derived Organic-Inorganic Hybrid Material

2011 ◽  
Author(s):  
M. Firdaus A. Samah ◽  
Amirjan Nawabjan ◽  
Ahmad Sharmi Abdullah ◽  
Mohd Haniff Ibrahim ◽  
Norazan Mohd Kassim ◽  
...  
Keyword(s):  
Hybrid Material ◽  
Sol Gel ◽  
Inorganic Hybrid ◽  
Inorganic Hybrid Material ◽  
Mmi Coupler

Thermal Analysis Kinetics of Pd-Doped SiO2 Organic-Inorganic Hybrid Material

2017 ◽  
Vol 727 ◽  
pp. 272-279 ◽  
Author(s):  
Jing Yang ◽  
Hong Jun Li ◽  
Rui Hua Mu ◽  
Ya Mei Zhao ◽  
Zhi Tong
Keyword(s):  
Thermal Decomposition ◽  
Hybrid Material ◽  
Sol Gel ◽  
Kinetic Mechanism ◽  
Exponential Factor ◽  
Inorganic Hybrid ◽  
Inorganic Hybrid Material ◽  
Exponential Factors ◽  
Thermal Analysis Kinetics ◽  
Kinetics Of

Pd-doped SiO2 organic-inorganic hybrid material (Pd/M-SiO2) was prepared by sol-gel method and characterized by XRD, FTIR spectra and TG/DTG analysis. The most probable kinetic mechanism function, apparent activation energy and pre-exponential factor of the thermal decomposition for Pd/M-SiO2 material were calculated using the combined Coast-Redfern intergral and Αchar differential methods. Pd element in noncalcined Pd/M-SiO2 materials exists in PdCl2 form. FTIR spectroscopy confirmed the existence of hydrophobic Si−CH3 groups. The thermal decomposition process of Pd/M-SiO2 materials can be divided into four stages, with different mechanism functions. The activation energies are 76.37, 146.85, 208.90 and 413.89 kJ·mol−1 for the four stages, respectively, and the pre-exponential factors are 5.04×1012, 7.14×1013, 2.93×1012 and 6.56×1019 s−1, respectively. There is no obvious influence of the existence of metallic Pd0 on the thermal decomposition of methyl.

Photo-curable siloxane hybrid material fabricated by a thiol–ene reaction of sol–gel synthesized oligosiloxanes

2011 ◽  
Vol 47 (21) ◽  
pp. 6051 ◽  
Author(s):  
Joon-Soo Kim ◽  
SeungCheol Yang ◽  
HyungJin Park ◽  
Byeong-Soo Bae
Keyword(s):  
Hybrid Material ◽  
Sol Gel ◽  
Ene Reaction ◽  
Siloxane Hybrid Material

Synthesis of an Organic–Inorganic Alq3-Based Hybrid Material by Sol–Gel Method

2014 ◽  
Vol 25 (4) ◽  
pp. 680-686 ◽  
Author(s):  
Sina Modiri ◽  
Mohsen Mohseni ◽  
Ezzedin Mohajerani ◽  
Elaheh Kowsari
Keyword(s):  
Hybrid Material ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Synthesis and applications of TEOS/PDMS hybrid material by the sol-gel process

1999 ◽  
Vol 13 (5) ◽  
pp. 361-372 ◽  
Author(s):  
Goo-Dae Kim ◽  
Dong-A. Lee ◽  
Ji-Woong Moon ◽  
Jae-Dong Kim ◽  
Ji-Ae Park
Keyword(s):  
Hybrid Material ◽  
Sol Gel ◽  
Sol Gel Process
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