Superhydrophobic silica aerogel microspheres from methyltrimethoxysilane: rapid synthesis via ambient pressure drying and excellent absorption properties

RSC Advances ◽  
2014 ◽  
Vol 4 (9) ◽  
pp. 4535-4542 ◽  
Author(s):  
Shan Yun ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Silica Aerogel ◽  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Rapid Synthesis ◽  
Absorption Properties ◽  
Superhydrophobic Silica

scholarly journals Silica Aerogel Monoliths Derived from Silica Hydrosol with Various Surfactants

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3192 ◽  
Author(s):  
Dong Chen ◽  
Xiaodong Wang ◽  
Wenhui Ding ◽  
Wenbing Zou ◽  
Qiong Zhu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Stability ◽  
Silica Aerogel ◽  
Low Cost ◽  
Ambient Pressure ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Low Thermal Conductivity ◽  
Silica Hydrosol ◽  
High Production Cost

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.

scholarly journals Eco-friendly approach for preparation of water-based superhydrophobic silica aerogels via ambient pressure drying

2021 ◽  
Vol 8 (1) ◽  
pp. 015021
Author(s):  
Xiaoling Yuan ◽  
Lihui Xu ◽  
Hong Pan ◽  
Yong Shen ◽  
Liming Wang ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Water Based ◽  
Superhydrophobic Silica

A silica aerogel as an extractive coating for in-tube solid-phase microextraction to determine polycyclic aromatic hydrocarbons in water samples

2019 ◽  
Vol 11 (45) ◽  
pp. 5784-5792 ◽  
Author(s):  
Xiangping Ji ◽  
Juanjuan Feng ◽  
Chunying Li ◽  
Sen Han ◽  
Jiaqing Feng ◽  
...  
Keyword(s):  
Silica Aerogel ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Ambient Pressure ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Ambient Pressure Drying ◽  
Acid Base ◽  
Polycyclic Aromatic

A silica aerogel with high surface area was prepared by an acid–base two-step catalytic sol–gel method under ambient pressure drying.

scholarly journals Synthesis and Characterization of Silica Aerogel from Rice Husk with Ambient Pressure Drying Method

2020 ◽  
Vol 1535 ◽  
pp. 012049
Author(s):  
Nor Fadilah Mohamad ◽  
Noor Hidayu Abdul Rani ◽  
Omar Syah Jehan Elham ◽  
Siti Hajar Anaziah Muhamad ◽  
Siti Afifah Muda ◽  
...  
Keyword(s):  
Rice Husk ◽  
Silica Aerogel ◽  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Synthesis And Characterization ◽  
Drying Method
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