On April 1, the reporter learned from the Beijing Graphene Technology Research Institute that China Aviation Technology and Aviation Materials Institute, a company of Shichuang Science and Technology Park located in the North District of Zhongguancun Science City, successfully developed materials with superior antibacterial properties, better breathability, The new graphene mask is more than ten times longer than ordinary masks.
What's so amazing about graphene? The reporter learned that the thickness of single-layer graphene is only 0.35 nanometers, which is the thinnest two-dimensional material known in the world. It has rich and peculiar physical and chemical characteristics, such as outstanding thermal conductivity and mechanical properties, extraordinary electron transfer performance, and It has certain antibacterial activity and can be applied in the fields of electronics, information, energy, physics, biomedicine and materials science.
Researchers from China Aviation Development and Aeronautics Institute introduced that graphene masks are a new type of graphene polypropylene meltblown cloth in the key filter layer between spunbond non-woven fabrics that make up ordinary masks. Compared with ordinary masks, the new graphene masks have the characteristics of strong antibacterial properties, better breathability, and longer service life.
"Graphene, as a two-dimensional carbon nanomaterial, can form a natural" nano knife "on a meltblown cloth. Under the action of natural respiration, it destroys the cell wall of germs and plays a good bactericidal effect." The technician introduced. In addition, because graphene meltblown cloth has one-way breathability, it is more breathable than traditional meltblown cloth during exhalation. In terms of use time, the effective use time of traditional masks is 4 hours, and the filtering function will be significantly reduced after 4 hours. The use time of new graphene masks is more than 48 hours, which is more than 12 times that of traditional masks, and the new graphene masks are continuously worn. After 48 hours the filtration efficiency was only reduced by 4%.
In fact, the development of masks is not the main business of China Aeronautics and Astronautics Institute. China Aeronautics and Astronautics Institute was originally a manufacturer of aviation engines. After the outbreak, the team used the advantages of material technology to quickly start the development of new graphene masks.
At the beginning of development, based on the technology of graphene environmental purification materials, researchers accelerated the development of graphene polypropylene materials, graphene meltblown cloth materials, and graphene meltblown special equipment. Only planning, development, and batch production were used. In 25 days, it opened the application chain of graphene in the field of biomedical protection and environmental purification. Wang Xudong, director of the Beijing Graphene Industry Innovation Center and director of the Beijing Graphene Technology Research Institute, revealed in an interview with reporters that the new graphene mask production line currently has a production capacity of 200,000 per day.
The reporter learned that in May 2017, the Beijing Municipal Government and China Aviation Development Co., Ltd. jointly initiated the establishment of Beijing Graphene Technology Research based on a series of internationally leading achievements in graphene preparation and application technology in the past 10 years. Institute Co., Ltd., creating a graphene industry innovation center, has now conducted research on the application of graphene and metal materials, graphene and rubber materials in multiple industrial chains.