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- W4206513530 abstract "Aerogels refers to a class of highly porous solid materials with nano-sized open pores. It has attracted research attentions because of its unique properties, such as extremely low density and thermal conductivity. The highly porous nature of silica aerogel combined with its high thermal stability also makes it an ideal candidate for thermal insulation under extreme environments. One such application in aerospace is for thermal protection systems (TPS) of reentry vehicles. A major drawback of conventional silica aerogel is its brittleness which significantly limits the applications of pure silica aerogels. To overcome this issue, efforts have been made in recent years to prepare aerogel composites by incorporating the aerogels into a polymer matrix composite. In this study, the objective is to investigate the processing conditions on morphology and thermal properties of an aerogel composite material with high char yield, low density, and low thermal conductivity. Unlike flexible polysiloxanes, such as PDMS, the polysiloxane resin used in this study is a rigid siloxane polymer that has exceptionally high char yield and thermal stability. The goal of this study is to create a polysiloxane/aerogel composite that possess low density, low thermal conductivity, and high char yield suitable for advanced aerospace applications. The composites observed in this study underwent varying aerogel loadings and curing cycles. The samples were then examined for char yield using thermogravimetric analysis (TGA), flammability properties using microscale combustion calorimetry (MCC), and microstructural analysis using scanning electron microscopy (SEM). Then, the data obtained from the aforementioned testing methods are analyzed and presented." @default.
- W4206513530 created "2022-01-25" @default.
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- W4206513530 date "2022-01-03" @default.
- W4206513530 modified "2023-10-17" @default.
- W4206513530 title "Polysiloxane/Aerogel Nanocomposites: Extended Morphology, Thermal, and Flame-resistant Properties" @default.
- W4206513530 cites W2314620164 @default.
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- W4206513530 doi "https://doi.org/10.2514/6.2022-1239" @default.
- W4206513530 hasPublicationYear "2022" @default.
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