Researchers at Rice University and Pennsylvania State University recently stated that they found that adding a small amount of boron to carbon in the production of carbon nanotubes results in a solid, sponge-like, and reusable lipophilic mass. Strong oil absorption capacity is expected to be used for the cleanup of oil spills on the surface. This is the first nanosponge-like material that scientists have added to their nanotubes for the first time to form covalent bonds and have extremely strong properties. Two university scientists cooperated with other universities in the United States and scientists from Spain, Belgium and Japan during the research process. Their research was published on the Nature magazine website. The article's lead author Daniel Hassam, a graduate student in materials science at Rice University, said that the substances they developed have both anaerobic and lipophilic properties. The density of this nano-spongy material is extremely low, with 99% of the internal air, which indicates that it has a great oil-absorbing space. At the same time, it is also electrically conductive and can be manipulated by magnets. In demonstrating the properties of the nanosponge-like material, Hashim placed it in a water-filled dish and floated waste oil on the water. Soon, the oil penetrated the nano-sponge. It is taken out and ignited with matches. After the oil is burned, the nano sponge material is restored to its original shape and can be used again for oil absorption. Hashim said that the new oil-absorbing substance can be reused and is very durable. The experiments performed on the sample show that after 10,000 compressions, it is still stretchable. In addition, new oil-absorbing substances can also be used as a backup. The researchers stated that multi-walled carbon nanotubes are grown on the substrate by chemical vapor deposition and are usually not connected to each other. However, the addition of boron as a dopant causes the nanotubes to be connected at the atomic level, allowing them to form a complex network structure. In the past, people had developed nano sponge-like materials with oil-absorbing potential, but it was the first time that nano-sized oil-absorbing substances were formed by covalent bonds between nanotubes. Researchers have high hopes for the application of new oil-absorbing substances in the environment. They will develop methods for producing large-scale, oil-absorbing substances so that they can be used for the collection of oil spills at sea. At the same time, they also intend to make use of new materials to produce more efficient and lighter weight batteries. They can also be used as scaffolds or filter membranes for bone tissue regeneration, and even advanced for the automotive and aircraft industries by injecting macromolecules into new substances. Ultralight complexes. (Reporter in the United States, Mao Li)
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