Preparation of highly porous Al 2 O 3 aerogel by one‐step solvent‐exchange and ambient‐pressure drying

2020 ◽  
Vol 17 (3) ◽  
pp. 1201-1212
Author(s):  
Roshan Wagle ◽  
Jeong Kun Yoo
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Solvent Exchange ◽  
One Step ◽  
Highly Porous

An economic and environmentally benign approach for the preparation of monolithic silica aerogels

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 93374-93383 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Junxia Peng ◽  
Guanqun Du ◽  
Hongxia Zhang ◽  
Yu Fang
Keyword(s):  
Ambient Pressure ◽  
Sol Gel ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Environmentally Benign ◽  
Solvent Exchange ◽  
Monolithic Silica ◽  
One Step ◽  
Thermal Conductivities

One step sol–gel reaction, followed by solvent exchange free ambient pressure drying resulted in various monolithic silica aerogels from super-hydrophobic to hydrophilic with densities as low as 0.026 g cm−3 and thermal conductivities lower than air.

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.

Superhydrophobic and porous methylsilicone monoliths prepared by one-step ammonia-catalyzed gelation and ambient pressure drying

2010 ◽  
Vol 356 (35-36) ◽  
pp. 1837-1841 ◽  
Author(s):  
Huifang Xu ◽  
Yudong Huang ◽  
Li Liu ◽  
Jianwei Song ◽  
Chaoqun Wang ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
One Step

Facile synthesis of silica aerogel composites via ambient-pressure drying without surface modification or solvent exchange

Vacuum ◽  
2020 ◽  
Vol 173 ◽  
pp. 109117 ◽  
Author(s):  
Dongxuan Du ◽  
Yonggang Jiang ◽  
Junzong Feng ◽  
Liangjun Li ◽  
Jian Feng
Keyword(s):  
Surface Modification ◽  
Silica Aerogel ◽  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Solvent Exchange ◽  
Facile Synthesis

Preparation and Characterization of Hydrophobic Silica Aerogel by Ambient Pressure Drying Method

2013 ◽  
Vol 544 ◽  
pp. 144-147 ◽  
Author(s):  
Hui Xu ◽  
Gui Ln Fu ◽  
Yu Qiang Guo ◽  
Jing Chun Tu ◽  
Yong Chen
Keyword(s):  
Silica Aerogel ◽  
Ambient Pressure ◽  
Average Pore Size ◽  
Ambient Pressure Drying ◽  
Solvent Exchange ◽  
Drying Method ◽  
Average Pore ◽  
Ft Ir ◽  
Hexane Solution

Silica aerogel has been prepared by ambient pressure drying technique using water glass as starting materials. Solvent exchange and surface modification were simultaneously conducted by immersing the wet hydrogel in EtOH/TMCS(Tri Methyl Chloro Silane)/hexane solution. The silica aerogel was obtained with the density of 0.110g•cm-3 and 95.2% porosity. The specific surface area of the silica aerogel was 472.5m2•g-1 with a average pore size distrubution of 27.5nm. FT-IR spectrum analysis showed that the surface of the silica aerogel was modified by Si-CH3 groups, which allowed the aerogel to be hydrophobic.

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