Robust monolithic polymer(resorcinol-formaldehyde) reinforced alumina aerogel composites with mutually interpenetrating networks
作者： Ya Zhong , Gaofeng Shao , Xiaodong Wu , Yong Kong , Xue Wang
DOI: 10.1039/C9RA03227D
关键词: Resorcinol 、 Adsorption 、 Aerogel 、 Specific surface area 、 Thermal conductivity 、 Materials science 、 Composite material 、 Supercritical fluid 、 Polymer 、 Compressive strength
摘要: Monolithic polymer(resorcinol-formaldehyde) reinforced alumina (RF/Al2O3) aerogel composites were prepared using a sol–gel method and supercritical fluid CO2 drying. The formation mechanism, chemical compositions, pore structures, morphologies, thermal mechanical performances of RF/Al2O3 with different RF/Al molar ratios investigated. results show that the two networks organic resorcinol-formaldehyde inorganic are completely independent one another. as-synthesized aerogels consist spherical carbon particles fibrous alumina, which possess low bulk density (0.077–0.112 g cm−3), shrinkage (1.55–2.76%), conductivity (0.024–0.028 W m−1 K−1), high specific surface area (453.26–722.75 m2 g−1). Especially, sample ratio = 1 shows best network structure higher compressive strength (1.83 MPa) Young's modulus (122.57 MPa). resulting robust could be potentially used as insulators, catalysts adsorbents.
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