scholarly journals Modification of graphene with silica nanoparticles for use in hybrid network formation from epoxy, novolac, and epoxidized novolac resins by sol-gel method: Investigation of thermal properties

2018 ◽  
Vol 12 (3) ◽  
pp. 187-202 ◽  
Author(s):  
A. Mousavi ◽  
H. Roghani-Mamaqani ◽  
M. Salami-Kalajahi ◽  
S. Shahi ◽  
A. Abdollahi
Keyword(s):  
Thermal Properties ◽  
Silica Nanoparticles ◽  
Network Formation ◽  
Sol Gel ◽  
Hybrid Network ◽  
Gel Method ◽  
Sol Gel Method ◽  
Novolac Resins

Preparation of hybrid composites based on epoxy, novolac, and epoxidized novolac resins and silica nanoparticles with high char residue by sol-gel method

2017 ◽  
Vol 39 (S4) ◽  
pp. E2316-E2323 ◽  
Author(s):  
Amin Abdollahi ◽  
Hossein Roghani-Mamaqani ◽  
Mehdi Salami-Kalajahi ◽  
Bahareh Razavi ◽  
Alireza Mousavi ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Hybrid Composites ◽  
Sol Gel ◽  
Char Residue ◽  
Gel Method ◽  
Sol Gel Method ◽  
Novolac Resins

scholarly journals Thermal properties and water repellency of cotton fabric prepared through sol-gel method

2016 ◽  
Vol 20 (3) ◽  
pp. 863-866 ◽  
Author(s):  
Jia-Li Gu ◽  
Qiang-Hua Zhang ◽  
Yun-Bo Chen ◽  
Guo-Qiang Chen ◽  
Tie-Ling Xing
Keyword(s):  
Thermal Properties ◽  
Cotton Fabric ◽  
Sol Gel ◽  
Water Repellency ◽  
Gravimetric Analysis ◽  
Limiting Oxygen Index ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Hydrosol ◽  
Phosphorus Doped

Cotton fabrics were treated by one-step sol-gel method. The pure silica hydrosol and phosphorus-doped hydrosol were prepared with the addition of a hydrophobic hexadecyltrimethoxysilane to decrease the surface energy of cotton fabric. The thermal properties and water repellency of treated cotton fabric were characterized by thermo-gravimetric analysis, micro combustion, limiting oxygen index, and contact angle measurement. The results showed that cotton fabric treated by phosphorus-doped silica hydrosol had excellent flame retardance, and the water repellence was apparently improved with the addition of hexadecyltrimethoxysilane.

Investigation of the structural and thermal properties of Y, Ag and Ce-assisted SiO2–Na2O–CaO–P2O5-based glasses derived by sol–gel method

2016 ◽  
Vol 128 (2) ◽  
pp. 765-770 ◽  
Author(s):  
Omer Kaygili ◽  
Serhat Keser ◽  
Cengiz Tatar ◽  
Suleyman Koytepe ◽  
Tankut Ates
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Silica Nanoparticles Synthesized from Maize Cob using Modified Sol-Gel Method

2020 ◽  
Vol 15 (2) ◽  
pp. 22-29
Author(s):  
Jeleel Adekunle Adebisi ◽  
Johnson Olumuyiwa Agunsoye ◽  
Sefiu Adekunle Bello ◽  
M. Haris ◽  
M. Senthilkumar ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Silica Nanoparticles ◽  
Amorphous Silica ◽  
Sol Gel ◽  
Agricultural Wastes ◽  
Gel Method ◽  
Sol Gel Method ◽  
Maize Cob ◽  
Pre Treatment ◽  
Maize Cobs

Silica has found applications in many industries. Its production from agricultural wastes has been reported but with marked agglomeration of the final product. This work investigated production of silica nanoparticles from maize cob and effect of sol-gel modification with ethylene glycol on degree of agglomeration was also examined. This work also explored the effects of acid pre/post calcination treatments of the maize cob. Maize cob was treated with HCl prior to and after calcination. Using sol-gel method, silica was produced from both untreated and treated maize cobs. Ethylene glycol was also added to sodium silicate prior to precipitation of silica gel for modification of the conventional sol-gel procedure. The results showed that acid treatments affect the purity of silica nanoparticles. Ethylene glycol was observed to reduce degree of agglomeration in silica nanoparticles production from agricultural wastes. Silica nanoparticles of sizes between 5 and 50 nm were successfully synthesized. Keywords: Agricultural Wastes, Maize cob, Amorphous silica, Agglomeration, Sol-gel, Acid pre-treatment.

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