Multiple assembly strategies for silica aerogel-fiber combinations – A review

Revealing Disparities in Porous Networks Between Yttria Aerogel Assemblies with Nanosheets and Nanoparticles and Their Ultrathermal Insulation and Optical Properties

“…In practical applications, aerogel as thermal insulation material is usually served in a composite form, in which the aerogel is supported by a random fiber network, that can further improve not only the structure stabilities at high-temperature exposure but also the mechanical strength. , Herein, the Y 2 O 3 aerogels were incorporated into a zirconia fiber by vacuum infiltration. After that, the aerogel composites can be processed into any shaped pattern to meet the needs of different working conditions (Figure a).…”

A Two-Step Route to SiO2 Nanofiber-Reinforced Aerogel Composites with Lightweight and High Temperature Resistance for Thermal Insulation

“…Aerogels, with their low thermal conductivity, nanoporous structure, and high specific surface area, occupy an irreplaceable role in thermal management applications such as construction, pipe insulation, and aerospace, making the search for a strategy to improve the mechanical properties of aerogels an urgent issue. − Embedded fibers are an effective strategy for enhancing the mechanical properties of aerogel materials, standing out among methods such as optimizing the internal structure and cross-linking polymers, among others. − Inorganic fibers, particularly glass − and ceramic fibers, − have expanded the application of FACs in extreme temperatures. However, the massive introduction of fibers inevitably results in a high density of the material and a deterioration of the insulation properties. , This becomes a bottleneck that hinders the practical application of the material.…”

“…Nonetheless, the density of most fiber-reinforced aerogel composites still exceeds 0.1 g cm –3 . Because of the compatibility with aerogel nanopores, nanofibers can provide better interaction with aerogel and increase the thermal resistance of materials . Therefore, nanofibers generated through 3D printing, self-assembly, templating, chemical vapor deposition, hydrothermal synthesis, and electrostatic spinning have been used to improve aerogels, especially electrostatically spun nanofibers with a large aspect ratio, good continuity, and low apparent density. , Since then, more electrostatically spun inorganic nanofibers, such as mullite fibers and SiBNO fibers, have been employed to enhance the applicability of aerogel materials in thermal barriers. − The mullite-based fiber composite aerogel, for example, has a low density of 34.64–48.89 mg cm –3 and a thermal conductivity of 0.033–0.043 W m –1 K –1 at room temperature and can withstand temperatures up to 1400 °C .…”

“…It is noteworthy that fiber dispersion and impregnation are still the primary methods for preparing fiber-reinforced aerogel composites. To prevent fiber deposition, they have strict gelling time requirements. , Densification of the fiber matrix is the root cause of the high density, and the uniform distribution of fibers and aerogel is not entirely solved.…”

Recent Progress in Modifications, Properties, and Practical Applications of Glass Fiber

“…It has become an important adsorbent in the field of chemistry and an important new, lightweight, and energy-saving composite multifunctional carrier. It can be used for insulation [ 8 ], fire prevention [ 9 , 10 ], heat insulation [ 11 , 12 , 13 ], sound insulation [ 14 , 15 , 16 ], adsorption [ 17 , 18 ], and as a polymer precursor [ 19 , 20 , 21 ]. It is widely used in plastics, rubber, chemicals, aerospace, and other fields.…”