Home >

Do You Know The Mask Made Of Natural Degradable Fiber Material, Which Can Make The Virus Lose Its Way, Contains Antiviral Drugs

2021/8/11 18:01:00 39

??? 日本語 Fran?ais English 中文

　　 Column language:

　　 Since the outbreak of new crown pneumonia, it is urgent to develop high-quality emergency protection materials. As an urgent, important and universal research project, emergency protection fiber has been widely concerned by the national advanced functional fiber innovation center, the national and even the world fiber and product industry. To this end, in March 2020, the national advanced functional fiber innovation center and Shenghong holding group jointly set up the "Shenghong · special fund for scientific research on fiber materials and products for emergency support and public safety", focusing on the research and development of scientific research projects related to emergency support and fiber materials and products for public safety. After more than one year's research and development, recently, the national advanced functional fiber Innovation Center released the latest research and development results of "Shenghong · fiber materials and products for emergency support and public safety" to the public.

　　 In order to promote and publicize the R & D achievements of these projects in detail, the national advanced functional fiber innovation center and textile and clothing weekly jointly launched a series of reports on "advanced functional fiber, adding weight for safety". According to the items of masks, advanced functional fibers and products for protection, and innovative fibers and products for protection, the latest progress of project research and development is reported in detail in three phases.

　　 I still remember that in the early 2020, when the new crown pneumonia epidemic was rampant, there was a serious shortage of masks and the price of melt blown fabric soared, exposing China's shortcomings in the field of functional protective fiber textiles. In the face of this situation, many universities, enterprises and institutions in the industry have given full play to their technical and production advantages. In response to the needs of individual protection and medical front-line professional protection in response to new crown pneumonia, SARS and other epidemics as well as haze weather, they have carried out relevant research on advanced functional fibers and products for protection, and have developed barrier, barrier, anti SARS, anti-virus, anti-virus and anti-inflammatory drugs Advanced fiber key preparation technology and key equipment for further improvement of comfort and other functions.

　　 Overcome problems related to electrostatic adsorption of traditional masks

　　 As we all know, the important material of traditional medical masks is melt blown cloth, which is mainly made of polypropylene. Polypropylene has many voids, fluffy structure and good wrinkle resistance. These ultra-fine fibers with unique capillary structure can increase the number of fibers per unit area and specific surface area, so that the meltblown cloth has good filterability, shielding property, and anti crease ability Thermal insulation and oil absorption. However, in recent years, the particle size of SARS, covid-19 and other new coronavirus outbreaks is about 100 nm, while the diameter of meltblown cloth fiber used in traditional disposable masks is micron scale, and the mesh size constructed by it is larger than the virus itself. Therefore, the virus adsorbed on the mask may become a new source of pollution, This will cause secondary pollution.

Anti virus mask developed by Donghua University and Shengna Technology (Shanghai) Co., Ltd.

　　 In order to solve this problem, Donghua University and Shengna Technology (Shanghai) Co., Ltd. have developed anti-virus masks by loading anti-virus drugs on nanofibers and non-woven fabrics inside the masks, which are mainly used by patients and doctors. Mo Xiumei, the project leader, introduced that the anti-virus mask containing the drug has reached 99% of protection level 2, and the antibacterial rate of Escherichia coli, Staphylococcus aureus and Candida albicans has reached 99%, the antiviral activity of H1N1 is 99.95%, and the antiviral activity of H3N2 is 99.91%.

The school of textile science and engineering of Zhejiang University of science and technology innovatively invented a soft supported nanofiber membrane, which can be reused.

　　 After using the traditional mask several times, the filtration efficiency will be reduced due to the electrostatic elimination of the charged layer. To solve this problem, Yu Bin, Dean of the school of textile science and Engineering (International Silk Institute) of Zhejiang University of science and technology, led a team to innovatively invent a soft supported nanofiber membrane, which uses the physical blocking filtration principle to block viruses, so as to avoid affecting the filtration efficiency due to electrostatic elimination caused by high humidity environment, And it can be reused. In addition, the porosity of the nanofiber membrane is very high (pore size < 0.1) μ m) It can achieve the balance between high filtration efficiency and low filtration resistance. It can not only block the virus, but also has good high permeability. According to Yu Bin, the mask made of this material has been tested by the national labor protection products quality supervision and inspection center, the national textile and clothing product quality supervision and Inspection Center (Zhejiang) and other authoritative qualification institutions. The mask filtration efficiency is more than 95%, the inspiratory resistance is 88-91pa (far lower than the standard requirement ≤ 350pa), and the expiratory resistance is 76pa (far lower than the standard requirement ≤ 250pa), It meets the requirements of kn95 in GB 2626-2006.

Beijing University of chemical technology has innovatively developed a nanofiber material that can make the virus "lost".

　　 Tan Jing, a professor at Beijing University of chemical technology, led the team to develop a nanofiber material that can make the virus "lost". According to Tan Jing, the material is made by "zero solvent" melt differential electrospinning technology. The high-voltage electrostatic force can evenly divide the polymer solution into multiple streams through electrostatic differentiation and "tug of war effect". Finally, fiber membranes with different morphologies and structures can be obtained, forming intricate and complex microporous channels, and viruses will be intercepted like "labyrinth", Moreover, after alcohol disinfection or water washing, the function of blocking virus will not be greatly reduced, which can meet the requirements of repeated use. ?

　　 The new material mask can be degraded naturally

　　 In view of the explosive use of masks, there are a lot of discarded masks around the world, which may lead to a new round of white crisis. It has been reported that there are water pollution and white garbage on many beaches in Australia. Among these common plastic pollution, masks have appeared. In the Mediterranean, French environmental protection organizations have also found masks and protective gloves everywhere! Most of these masks are traditional polypropylene masks, which can not be degraded in the environment. The defects of the recovery system will make a large number of polypropylene masks exposed to the soil and water environment, and the materials will be further turned into micro plastics to enter the water cycle and atmospheric cycle. It will take hundreds of years for the complete degradation.

　　 The mask developed by the team of Beijing University of chemical technology can solve this problem. Tan Jing introduced that this kind of mask uses polylactic acid as raw material and can be completely degraded into carbon dioxide and water under certain conditions, which has the advantages of renewable and pollution-free. Moreover, the fiber material used in the mask adopts melt differential electrospinning technology, which does not need to use solvents, completely discards toxic solvents, and can withstand repeated washing and reuse, thus realizing the whole process green manufacturing. For the current research and development of this technology, Tan Jing introduced that compared with the mature traditional melt blown technology, the melt differential electrospinning technology still needs to further improve the manufacturing efficiency and reduce the manufacturing cost. At present, the team is further developing new filter materials, such as multifunctional degradable filter materials with antibacterial, antivirus and filtration functions; At the same time, it is necessary to further optimize the structure of the filter material, through the micro nano intercalation, to achieve lower filtration resistance and improve comfort.

　　 Shandong kuanyuan New Material Technology Co., Ltd. has also developed a new type of bio based activated carbon fiber composite material by using natural degradable biological fiber as precursor. The protective mask made of the material has the characteristics of high adsorption rate, strong barrier function, good air permeability and good bacteriostasis.

　　 It is understood that in order to continue to support the research and development of fiber materials and products for emergency support and public safety, the innovation center of the national advanced functional fiber innovation center has issued the application guide for "Shenghong · scientific research project of fiber materials and products for emergency support and public safety" in 2021, which will focus on high barriers such as epidemic prevention and medical and health protection The detection and evaluation of functional fiber materials and products for protection, such as antibacterial and antibacterial functional fiber materials, intelligent fiber and its protective materials, functional individual protective fiber materials and products with high flame retardant, anti droplet, anti-static, anti ultraviolet and other functional personal protective fiber materials and products in various application fields, as well as the detection and evaluation of protective fibers and products. According to the guidelines, the innovation center will solicit relevant projects, organize experts to select the best projects, promote the implementation of projects, and conduct comprehensive evaluation and acceptance of scientific research projects. ? ? ??