| 초록 |
Aerogels are a kind of porous ultralight structured materials, which are obtained by replacing the liquid component of the gels with a gas while maintaining their gel structure. The porous structure is excellent in thermal insulation. In particular, nanocellulose, which is extracted from commercial wood pulps, can also be used to make aerogels and form, either homogeneously or in composite formulations. To obtain nanocellulose aerogels with enhanced thermal and mechanical properties, in this study, we have manufactured a series of composite aerogels by using hydrogels composed of carboxymethylated nanocellulose and polyacrylamide via a freeze drying method. The molecular interaction, structural features, and mechanical properties of the composite aerogels were characterized by using FT-IR, SEM, universal tensile machine, respectively. The thermal insulation performance was also identified in the temperature range of -50 to 80 °C using a thermal infrared camera. |
