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Rapid Preparation of Ultralow-density Silica Aerogels

Zhan Xu

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Abstract

The two-step(acid-base)sol-gel process is employed to prepare SiO_2 aerogels with TEOS as the precursor. The influence of solvent on the sol-gel proceed is investigated to optimize the experimental conditions. Ultralow-density silica aerogels with densities as low as 3 mg/cm~3 are made. SEM, BET,pore size distribution techniques are used to characterize the morphology and pore structure of the ultralow-density silica aerogel. The results show that CH_3CN can run up gel process and prepare low density silica aerogels rapidly.

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What this paper is about

The two-step(acid-base)sol-gel process is employed to prepare SiO_2 aerogels with TEOS as the precursor. The influence of solvent on the sol-gel proceed is investigated to optimize the experimental conditions. Ultralow-density silica aerogels with densities as low as 3 mg/cm~3 are made. SEM, BET,pore size distribution techniques are used to characterize the morphology and pore structure of the ultralow-density silica aerogel. The results show that CH_3CN can run up gel process and prepare low density silica aerogels rapidly.

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Available abstract

The two-step(acid-base)sol-gel process is employed to prepare SiO_2 aerogels with TEOS as the precursor. The influence of solvent on the sol-gel proceed is investigated to optimize the experimental conditions. Ultralow-density silica aerogels with densities as low as 3 mg/cm~3 are made. SEM, BET,pore size distribution techniques are used to characterize the morphology and pore structure of the ultralow-density silica aerogel. The results show that CH_3CN can run up gel process and prepare low density silica aerogels rapidly.

Key concepts: Aerogel, Materials science, Sol-gel, Chemical engineering, Solvent, Silica gel, Porosity, Process (computing)

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