Synthesis of high strength monolithic alumina aerogels at ambient pressure

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18025-18028 ◽  
Author(s):  
Fengchao Cao ◽  
Lili Ren ◽  
Xueai Li
Keyword(s):  
Ambient Pressure ◽  
High Strength ◽  
Ambient Pressure Drying ◽  
Alumina Aerogels ◽  
Alumina Sol ◽  
Monolithic Alumina

Mechanically strong monolithic alumina aerogels were obtained via ambient pressure drying by incorporating attapulgite (ATP) and alumina sol.

Synthesis of low shrinkage monolith alumina aerogels by surface modification and ambient pressure drying

2018 ◽  
Vol 13 (9) ◽  
pp. 1240-1244
Author(s):  
Chi Li ◽  
Zheng Gong ◽  
Likang Ding ◽  
Donglai Guo ◽  
Wenbin Hu
Keyword(s):  
Surface Modification ◽  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Alumina Aerogels

scholarly journals Facile Preparation of High Strength Silica Aerogel Composites via a Water Solvent System and Ambient Pressure Drying without Surface Modification or Solvent Replacement

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3983
Author(s):  
Dongxuan Du ◽  
Fengqi Liu ◽  
Yonggang Jiang ◽  
Junzong Feng ◽  
Liangjun Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Modification ◽  
Silica Aerogel ◽  
Ambient Pressure ◽  
High Strength ◽  
Ambient Pressure Drying ◽  
Synthesis Process ◽  
Insulation Material ◽  
Fiber Density ◽  
Solvent Replacement

To further reduce the manufacturing cost and improve safety, silica aerogel composites (SAC) with low density and low thermal conductivity synthesized via ambient pressure drying (APD) technology have gradually become one of the most focused research areas. As a solvent, ethanol is flammable and needs to be replaced by other low surface tension solvents, which is dangerous and time-consuming. Therefore, the key steps of solvent replacement and surface modification in the APD process need to be simplified. Here, we demonstrate a facile strategy for preparing high strength mullite fiber reinforced SAC, which is synthesized by APD using water as a solvent, rather than using surface modification or solvent replacement. The effects of the fiber density on the physical properties, mechanical properties, and thermal conductivities of SAC are discussed in detail. The results show that when the fiber density of SAC is 0.24 g/cm3, the thermal conductivity at 1100 °C is 0.127 W/m·K, and the compressive strength at 10% strain is 1.348 MPa. Because of the simple synthesis process and excellent thermal-mechanical performance, the SAC is expected to be used as an efficient and economical insulation material.

Transparent, ultraflexible, and superinsulating nanofibrous biocomposite aerogels via ambient pressure drying

2021 ◽  
Author(s):  
Guoqing Zu ◽  
Sheng Zeng ◽  
Ben Yang ◽  
Jia Huang
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Oxidized Starch ◽  
Nanofibrous Structure ◽  
First Time ◽  
Highly Porous

We report transparent, flexible, and superinsulating biocomposite aerogels with a homogeneous, highly porous, and nanofibrous structure based on oxidized starch and polyorganosiloxane via facile ambient pressure drying for the first time.

Microporous carbon aerogel prepared through ambient pressure drying route as anode material for lithium ion cells

2017 ◽  
Vol 28 (12) ◽  
pp. 1945-1950 ◽  
Author(s):  
Ancy Smitha Alex ◽  
Ananda Lekshmi M.S. ◽  
Sekkar V. ◽  
Bibin John ◽  
Gouri C. ◽  
...  
Keyword(s):  
Anode Material ◽  
Ambient Pressure ◽  
Lithium Ion ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Microporous Carbon ◽  
Lithium Ion Cells

Preparation of mesoporous crack-free Sb-SnO2 xerogels through ambient-pressure drying and its application as three-dimensional electrode

2018 ◽  
Vol 86 (2) ◽  
pp. 479-492 ◽  
Author(s):  
Siqi Liu ◽  
Xiezhen Zhou ◽  
Weiqing Han ◽  
Jiansheng Li ◽  
Xiuyun Sun ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Three Dimensional ◽  
Ambient Pressure Drying

The Microwave-Assisted Preparation and Properties of SiO2 Aerogels by Fractional Modification

2010 ◽  
Vol 148-149 ◽  
pp. 1152-1162 ◽  
Author(s):  
Wen Zhi Zheng ◽  
Li Chen ◽  
Xiang Hua Huang ◽  
Lei Fu
Keyword(s):  
Ambient Pressure ◽  
Sol Gel ◽  
Ambient Pressure Drying ◽  
Base Catalysis ◽  
Raw Material ◽  
Microwave Method ◽  
Scanning Calorimetry ◽  
Hydrophobic Sio2 ◽  
Water Bath Heating ◽  
Fractional Modification

Under microwave radiation and using trimethyl chlorosilane as modifier, hydrophobic SiO2 aerogel was prepared through fractional hydrophobic modification and ambient pressure drying of the raw material, tetraethoxysilane (TEOS), in the process of sol-gel and acid-base catalysis. Hydrophilic SiO2 aerogels were also prepared using the microwave method and water bath heating method. The SiO2 aerogels prepared using the three methods, including their morphology and chemical composition, were analyzed and compared using scanning electron microscopy, Brunauer-Emmett-Teller analysis method, Fourier transform infrared spectroscopy, X-ray diffraction, and themogravimetric-differential scanning calorimetry. The results indicate that by adopting the microwave reaction, the specific surface area of the SiO2 aerogels was effectively increased and the structure of the internal nanoscale pores of petal-coated shape was found to exist under the dense external surface of the SiO2 aerogels. Thermal stability of the hydrophobic SiO2 aerogels prepared through fractional modification assisted by the microwave method was increased with the hydrophobic angle at153°, which showed super hydrophobicity.

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