Study on the rigidity improvement of non-woven composite aerogel insulation material according to the non-woven fabric oriented design

Abstract

The aerogel composite insulation sheet which is complexed with fibers such as non-woven fabric and aerogel has been launched. However, it is one of the biggest problems for practical use that the insulation material has low strength and low rigidity because the main material is a fragile silica aerogel. Therefore, its durability as a structural material is a concern to use in various situations. So, in this study, for the five models modelled on the basis of the actual structure of non-woven fabric, which have respectively characteristic orientation distributions, it was examined whether the rigidity of the insulation material was improved by the design of the orientation of the non-woven fabric by using a structural analysis about the deflection evaluation due to its own weight of the insulation material. Consequently, it was confirmed that the rigidity of the material can be improved by aligning the non-woven fabric along the direction of deflection at the time of bending loads. In addition, for the non-woven fabric model that was targeted in this study, the distribution of orientation of the non-woven fabric doesn't affect increasing in the thermal conductivity (the deterioration of the thermal insulation properties) of the insulation by using a heat transfer analysis.

Keywords

• aerogel composite insulation sheet
• fiber orientation
• improving the rigidity
• thermal conductivity
• structural analysis
• heat transfer analysis