Synthesis and characterization of the physical, chemical and mechanical properties of isocyanate-crosslinked vanadia aerogels
作者： H. Luo , G. Churu , E. F. Fabrizio , J. Schnobrich , A. Hobbs
DOI: 10.1007/S10971-008-1788-Y
关键词:
摘要: A strong lightweight material (X-VOx) was formulated by nanocasting a conformal 4 nm thin layer of an isocyanate-derived polymer on the entangled worm-like skeletal framework typical vanadia aerogels. The mechanical properties were characterized under both quasi-static loading conditions (dynamic analysis, compression and flexural bending testing) as well high strain rate using split Hopkinson pressure bar (SHPB). effects mass density, moisture concentration low temperature determined evaluated. Digital image correlation used to measure surface strains through analysis images acquired ultra-high speed photography, indicating nearly uniform at all stages deformation during compression. energy absorption X-VOx plotted function temperature, compared with that plastic foams. remains ductile even −180 °C, characteristic not found in most materials. This unusual ductility is derived from interlocking sintering-like fusion nanoworms emerges ideal for force protection impact.
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