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Aerogel contains particles that are 2–5 nm in diameter. After the process of creating aerogel, it will contain a large amount of hydroxyl groups on the surface. The hydroxyl groups can cause a strong reaction when the aerogel is placed in water, causing it to catastrophically dissolve in the water.
Graphene aerogels have a Young's modulus on the order of 50 MPa. [7] They can be compressed elastically to strain values >50%. [6] The stiffness and compressibility of graphene aerogels can be attributed in part to the strong sp 2 bonding of graphene and the π-π interaction between carbon sheets.
Boron nitride aerogel is an aerogel made of highly porous boron nitride (BN). It typically consists of a mixture of deformed boron nitride nanotubes and nanosheets . It can have a density as low as 0.6 mg/cm 3 and a specific surface area as high as 1050 m 2 /g, and therefore has potential applications as an absorbent , catalyst support and gas ...
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Boron nitride is a thermally and chemically resistant refractory compound of boron and nitrogen with the chemical formula BN.It exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice.
Self-healing hydrogels are a specialized type of polymer hydrogel.A hydrogel is a macromolecular polymer gel constructed of a network of crosslinked polymer chains. Hydrogels are synthesized from hydrophilic monomers by either chain or step growth, along with a functional crosslinker to promote network formation.
Metallic microlattices are characterized by very low densities, with the 2011 record of 0.9 mg/cm 3 being among the lowest values of any known solid. The previous record of 1.0 mg/cm 3 was held by silica aerogels, and aerographite is claimed to have a density of 0.2 mg/cm 3. [11]
Researchers demonstrated a graphene-oxide-based aerogel that could reduce noise by up to 16 decibels. The aerogel weighed 2.1 kilograms per cubic metre (0.13 lb/cu ft). A conventional polyester urethane sound absorber might weigh 32 kilograms per cubic metre (2.0 lb/cu ft). One possible application is to reduce sound levels in airplane cabins.
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