At first glance, biodegradable materials, inks for 3D printing and aerogels don't seem to have much in common. All three have great potential for the future; however, "green" materials do not pollute the environment, 3D printing ...
Nanomaterials
Apr 4, 2024
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44
Researchers have developed a sensor made from "frozen smoke" that uses artificial intelligence techniques to detect formaldehyde in real time at concentrations as low as eight parts per billion, far beyond the sensitivity ...
Analytical Chemistry
Feb 9, 2024
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53
Stirring can allow the dispersion of substances evenly in liquid. Einstein's tea leaf paradox is a concept that shows how tea leaves can concentrate in a doughnut shape through a secondary flow effect during stirring. In ...
Thermal superinsulation materials with low thermal conductivities are essential for thermal insulation and protection under extreme conditions. These materials are particularly required in fields including deep-space exploration, ...
Nanomaterials
Jul 19, 2023
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1
Chinese scientists have developed a surface nanocrystallization method to create all-natural wood-inspired aerogel with better thermal insulation and fire retardancy.
Biochemistry
Feb 8, 2023
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7
Aerogels are lightweight materials with extensive microscale pores, which could be used in thermal insulation, energy devices, aerospace structures, as well as emerging technologies of flexible electronics. However, traditional ...
Polymers
Sep 29, 2022
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70
Aerogel materials serve a vital role as protective materials needed for many fields, including as electromagnetic interference shielding material for 5G technology, thermally insulating material in high-rise buildings and ...
Nanomaterials
Jul 19, 2022
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24
A team of researchers at the Harbin Institute of Technology, in China, working with a colleague in the U.S., has developed a new kind of aerogel for use in flexible thermal insulation material applications. In their paper ...
One day soon, buildings could become more energy-efficient—and environmentally sustainable—with insulating material developed from wood by researchers in Sweden. The newly-developed material offers as good or even better ...
Biochemistry
Jun 7, 2022
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Aerogels are extraordinary materials that have set Guinness World Records more than a dozen times, including as the world's lightest solids.
Nanophysics
Dec 2, 2021
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412
Aerogel is a synthetic porous material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density and thermal conductivity. It is nicknamed frozen smoke, solid smoke, solid air or blue smoke owing to its translucent nature and the way light scatters in the material; however, it feels like expanded polystyrene (styrofoam) to the touch.
Aerogel was first created by Samuel Stephens Kistler in 1931, as a result of a bet with Charles Learned over who could replace the liquid in 'jellies' with gas without causing shrinkage.
Aerogels are produced by extracting the liquid component of a gel through supercritical drying. This allows the liquid to be slowly drawn off without causing the solid matrix in the gel to collapse from capillary action, as would happen with conventional evaporation. The first aerogels were produced from silica gels. Kistler's later work involved aerogels based on alumina, chromia and tin oxide. Carbon aerogels were first developed in the late 1980s.
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