Application of Hydrophobic Silica/Fiber Composite Aerogels in Organic Absorption

Wei Wei; Chen Wei Li; Ji Min Xie; Jian Jun Zhu; Xiao Meng Lü; Chang Hao Yan

doi:10.4028/www.scientific.net/MSF.675-677.1035

Paper Titles

First-Principles Study of Adsorption Properties of NO₂ on Boron-Doped Silicon Carbide Nanotube
p.1015

Comparative Temperature Field Analysis of MgO Single Crystal Furnace Using Finite Element and Fuzzy Methods
p.1019

Synthesis and Performance of Perovskite YMn_xFe_1-xO₃ Photocatalyst
p.1025

Orthogonal Experimental Study on Preparation Conditions of V₂O₅/TiO₂ Catalysts for the SCR of NO with NH₃
p.1031

Application of Hydrophobic Silica/Fiber Composite Aerogels in Organic Absorption
p.1035

Green Synthesis of Nano-Size Silver Particles Colloidal Sol
p.1041

Synergy Effect of Ce/N Co-Doping on Anatase TiO₂ Photocatalysts from First Principles Calculation
p.1045

Variation Mechanism of Aspiration Pressure at the Tip of Metal Delivery Tube in Supersonic Atomization
p.1049

Enhanced Photocatalytic Activity of BiVO₄ for Water Oxidation by Mo Doping
p.1053

HomeMaterials Science ForumMaterials Science Forum Vols. 675-677Application of Hydrophobic Silica/Fiber Composite...

Application of Hydrophobic Silica/Fiber Composite Aerogels in Organic Absorption

Abstract:

SiO₂ aerogels, the lightest solid material have attracted much attention recently. However, it is difficult to be used in practical applications due to its fragility. A facile one step polymerincorporation sol-gel process, together with a surface modification and a normal temperature drying process, was developed to prepare silica-fiber composite aerogels. Four fibers (polyester fiber, polypropylene fiber, lignin fiber, polycrylonitrile fiber) were selected to enhance the intensity of silica aerogels, respectively. The obtained samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) specific surface area. Results showed that samples have a plenty of hydrophobic methyl group attached to their surface. The continuous network structure composed of silica aerogels of high purity are non-crystallized, porous, surface areas from 800 to 980 m²/g and light weight nano-materials. Adsorption experiment of the above samples over organic solution (benzene, toluene) was tested. The composite aerogels absorbed the organic liquids by nearly 6-8 times its own mass, showing potential application in organic absorption.