scholarly journals Effects of Phenyltriethoxysilane Concentration in Starting Solutions on Thermal Properties of Polyphenylsilsesquioxane Particles Prepared by a Two-Step Acid-Base Catalyzed Sol-Gel Process

2007 ◽  
Vol 115 (1338) ◽  
pp. 131-135 ◽  
Author(s):  
Kenji TAKAHASHI ◽  
Kiyoharu TADANAGA ◽  
Atsunori MATSUDA ◽  
Akitoshi HAYASHI ◽  
Masahiro TATSUMISAGO
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Acid Base ◽  
Sol Gel Process ◽  
Starting Solutions

One-pot synthesis of organo-silica hybrids with high thermal properties via a simple sol–gel process

2019 ◽  
Vol 140 (5) ◽  
pp. 2267-2274
Author(s):  
Fatemeh Javanbakht ◽  
Bahareh Razavi ◽  
Mehdi Salami-Kalajahi ◽  
Hossein Roghani-Mamaqani ◽  
Masoud Ommati
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
One Pot ◽  
One Pot Synthesis ◽  
Sol Gel Process ◽  
Silica Hybrids

Preparation of SiO2 Antireflective Film by a Base/Acid Two-Step Catalyzed Sol-Gel Process

2013 ◽  
Vol 860-863 ◽  
pp. 845-848 ◽  
Author(s):  
De Yi Li ◽  
Kun Peng ◽  
Ling Ping Zhou ◽  
Jia Jun Zhu
Keyword(s):  
Raw Materials ◽  
Salt Spray ◽  
Sol Gel ◽  
Acid Base ◽  
Gel Method ◽  
Antireflective Film ◽  
Sol Gel Process ◽  
Acid Catalyzed ◽  
Antireflective Films ◽  
Silica Sols

SiO2 antireflective films were prepared by two-step catalyzed sol-gel method with TEOS as the raw materials, acid and ammonia as catalyst. Effects of the ratio of acid-catalyzed and base-catalyzed silica sols on the transmittance and stability of SiO2 film were investigated. The transmittance can be adjusted by change the ratio of base-catalyzed sols, and a higher transmittance can be obtained in the higher ratio of base-catalyzed coatings. A higher stability of SiO2 film in salt spray can be obtained in higher ratio of acid-catalyzed AR coatings. AR coatings with excellent transmittance and stability can be obtained by adjusting the ratio of acid/base catalyzed silica sols.

Morphology, Crystallinity and Thermal Properties of Polyamide 66/Polyoxometalate Nanocomposites Synthesised Via an in situ Sol/Gel Process

2010 ◽  
Vol 212 (2) ◽  
pp. 180-190 ◽  
Author(s):  
Nicolas Cheval ◽  
Fang Xu ◽  
Nabil Gindy ◽  
Richard Brooks ◽  
Yanqiu Zhu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Polyamide 66 ◽  
Sol Gel Process

Thermoplastic and thermosetting properties of polyphenylsilsesquioxane particles prepared by two-step acid-base catalyzed sol-gel process

2007 ◽  
Vol 41 (3) ◽  
pp. 217-222 ◽  
Author(s):  
Kenji Takahashi ◽  
Kiyoharu Tadanaga ◽  
Atsunori Matsuda ◽  
Akitoshi Hayashi ◽  
Masahiro Tatsumisago
Keyword(s):  
Sol Gel ◽  
Acid Base ◽  
Sol Gel Process

scholarly journals Thermal Diffusion in Fibrous Aerogel Blankets

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 823 ◽  
Author(s):  
Ákos Lakatos ◽  
Anton Trník
Keyword(s):  
Thermal Properties ◽  
Thermal Annealing ◽  
Thermal Insulation ◽  
Sol Gel ◽  
Theoretical Background ◽  
Design Stage ◽  
Scanning Calorimetry ◽  
Insulation Materials ◽  
Sol Gel Process ◽  
Transient Thermal

Nowadays, the usage of thermal insulation materials is widespread not only in the building sector but also in the vehicle industry. The application of fibrous or loose-fill insulation materials like glass wool or mineral wool as well as aerogel is well known. Aerogel-based materials are among the best solid materials for thermal insulation available today; they are prepared through a sol–gel process. For building walls, the glass-fiber-enhanced types are the frequently used ones. They are prepared by adding the liquid–solid solution to the fibrous batting, which is called a sol–gel process. In the present paper, the changes in the most important building physical properties of aerogel blankets after thermal annealing are presented. The samples were subjected to isochronal heat treatments from 70 to 210 °C for 24 h. The changes in the thermal conductivity were followed by Holometrix Lambda heat flow meter, and differential scanning calorimetry results were also recorded. From the measured values, together with the densities, the most important thermal properties were calculated, such as thermal resistance, diffusivity, effusivity (heat absorption), and thermal inertia. In this paper, we attempt to clarify the role played by thermal annealing in the transient thermal properties of aerogel materials. Besides presenting the measurement results, a theoretical background is given. The investigations of not only the steady-state but also the transient thermal parameters of the materials are momentous at the design stage.

Structure of Polyphenylsilsesquioxane Particles Prepared by Two-Step Acid-Base Catalyzed Sol–Gel Process and Formation of Hollow Particles

2007 ◽  
Vol 7 (9) ◽  
pp. 3307-3312 ◽  
Author(s):  
Kenji Takahashi ◽  
Kiyoharu Tadanaga ◽  
Akitoshi Hayashi ◽  
Atsunori Matsuda ◽  
Kiyofumi Katagiri ◽  
...  
Keyword(s):  
Sol Gel ◽  
Acid Base ◽  
Hollow Particles ◽  
Sol Gel Process

PMMA–silica hybrid thin films with enhanced thermal properties prepared via a non-hydrolytic sol–gel process

2008 ◽  
Vol 109 (1) ◽  
pp. 143-147 ◽  
Author(s):  
Xiaomei Song ◽  
Xingxue Wang ◽  
Haitao Wang ◽  
Wei Zhong ◽  
Qiangguo Du
Keyword(s):  
Thin Films ◽  
Thermal Properties ◽  
Sol Gel ◽  
Sol Gel Process ◽  
Hybrid Thin Films ◽  
Silica Hybrid
Sign in / Sign up

Export Citation Format

Share Document