Journal
JOURNAL OF NATURAL FIBERS
Volume 19, Issue 15, Pages 10142-10156Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15440478.2021.1993486
Keywords
Aerogel; fibers; composite; adhesion; thermal conductivity
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This study presents a facile approach to develop super-insulating material based on silica aerogel reinforced with alfa nonwoven, using sol-gel process and vacuum compression molding. The results show that aerogel incorporation into the multiscale pores of the nonwoven improves the physical properties of the resulted composite and enhances hydrophobicity without affecting the low thermal conductivity.
Silica aerogels are the most efficient thermal insulation materials, this property is related essentially to their internal porosity consisting of micro and mesoporous structure. However, their weak mechanical properties and the high cost of drying methods limit the application of these materials. Herein, we propose a facile approach to the development of super-insulating material based on silica aerogel reinforced with alfa nonwoven. The sol-gel process followed by vacuum compression molding was used for composite manufacturing. SEM observations, IR, and Raman spectroscopies have confirmed the good adhesion between the aerogel and nonwoven. Mechanical tests, insulation property, fire resistance, and hydrophobicity are reported and the preliminary results confirm that the aerogel incorporation into the multiscale pores of the nonwoven improves the physical properties of the resulted composite and enhances hydrophobicity without affecting the low thermal conductivity.
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