Fabrication of super-elastic graphene aerogels by ambient pressure drying and application to adsorption of oils

Author(s):  
Xinxin Zhao ◽  
Wenlong Xu ◽  
Shuang Chen ◽  
Huie Liu ◽  
Xiaofei Yan ◽  
...  
Author(s):  
Guoqing Zu ◽  
Sheng Zeng ◽  
Ben Yang ◽  
Jia Huang

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.


2013 ◽  
Vol 25 (10) ◽  
pp. 5395-5398
Author(s):  
Seung-Kyu Park ◽  
Heon-Chang Kim ◽  
Chang-Sup Oh ◽  
Yong-Ha Kim

2017 ◽  
Vol 28 (12) ◽  
pp. 1945-1950 ◽  
Author(s):  
Ancy Smitha Alex ◽  
Ananda Lekshmi M.S. ◽  
Sekkar V. ◽  
Bibin John ◽  
Gouri C. ◽  
...  

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

2010 ◽  
Vol 148-149 ◽  
pp. 1152-1162 ◽  
Author(s):  
Wen Zhi Zheng ◽  
Li Chen ◽  
Xiang Hua Huang ◽  
Lei Fu

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.


Author(s):  
Liangjun Li ◽  
Yunyun Xiao ◽  
Sizhao Zhang ◽  
Junzong Feng ◽  
Yonggang Jiang ◽  
...  

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3192 ◽  
Author(s):  
Dong Chen ◽  
Xiaodong Wang ◽  
Wenhui Ding ◽  
Wenbing Zou ◽  
Qiong Zhu ◽  
...  

Owing to their ultra-low thermal conductivity, silica aerogels are promising thermal insulators; however, their extensive application is limited by their high production cost. Thus, scientists have started to explore low-cost and easy preparation processes of silica aerogels. In this work, a low-cost method was proposed to prepare silica aerogels with industrial silica hydrosol and a subsequent ambient pressure drying (APD) process. Various surfactants (cationic, amphoteric, or anionic) were added to avoid solvent exchange and surface modification during the APD process. The effects of various surfactants on the microstructure, thermal conductivity, and thermal stability of the silica aerogels were studied. The results showed that the silica aerogels prepared with a cationic or anionic surfactant have better thermal stability than that prepared with an amphoteric surfactant. After being heated at 600 °C, the silica aerogel prepared with a cationic surfactant showed the highest specific surface area of 131 m2∙g−1 and the lowest thermal conductivity of 0.038 W∙m−1∙K−1. The obtained low-cost silica aerogel with low thermal conductivity could be widely applied as a thermal insulator for building and industrial energy-saving applications.


RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51146-51155 ◽  
Author(s):  
Jin Wang ◽  
Yong Wei ◽  
Weina He ◽  
Xuetong Zhang

A general ambient pressure drying approach to synthesize silica-based composite aerogels with high BET surfaces and large pore volumes has been reported.


2021 ◽  
Vol 8 (1) ◽  
pp. 015021
Author(s):  
Xiaoling Yuan ◽  
Lihui Xu ◽  
Hong Pan ◽  
Yong Shen ◽  
Liming Wang ◽  
...  

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