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NEW TYPE OF FILTER PAPER AND FILTER RESPIRATOR MASK against PM 2.5 are finally being unleashed upon the world
time2017/10/27
The research team led by Mr. Zhu Yingjie, a researcher at the silicate institute of Shanghai, Chinese Academy of Sciences, has successfully developed a new type of filter paper and filter mask. Based on the hydroxyapatite super-long nanowire, the filter paper will remove PM2.5 efficiently. Recently, the research production has been published in the international renowned journal—journal of material chemistry, British royal chemical society, and has applied for an invention patent.
In recent years, the hazy weather is more and more frequent, and people pay more attention to the serious air pollution problem. PM2.5 in the air pose a serious threat to people's health, which refers to the particles with diameters equal to or less than 2.5 microns. The higher the content in the air, the more serious the air pollution. The most common air filter products used in daily life are filter masks. Commonly used in the filter masks are ordinary gauze, non-woven and other filter material. With the crude fiber and big pore between them, there’s a better filter effect for the large particles above PM10, however it is difficult to remove PM2.5 efficiently. Currently, many filter masks in the market have a lower filtering efficiency against PM2.5 and a poor permeability. Therefore, there is a urgent need to develop material and mask with high filtering efficiency and breathability to satisfy people’s needs in daily life and work.
Mr.Zhu says that the new filter paper is biocompatible, environmentally friendly, non-toxic, flexible. With the nano-porous structure and strong surface adsorption capacity, it can effectively intercept, adsorb and filter PM2.5. In order to improve the permeability of the new filter paper significantly, the hydroxyapatite super-long nanowire and plant fiber are combined together to form a multistage structure of composite pore, which has a better performance of high filtering efficiency and permeability. The filtering efficiency against PM2.5 and PM10 is more than 95%, which is better than other kinds of masks.
What’s more, he says, the filtering efficiency against PM2.5 is all above 95% whatever it is mild, moderate or severe pollution. Therefore the reusable filter paper will be used as the core material for the daily mask to protect against the hazy weather, which can be repeatedly used for a long time.
It is reported that the team has also developed a new type of filter paper with antibacterial function based on hydroxyapatite super-long nanowire, which has a high antibacterial activity against E. coli and staphylococcus aureus. Except for the highly effective antibacterial filter masks, the new filter paper is also expected to be used in air purifier and air conditioner.
In recent years, the hazy weather is more and more frequent, and people pay more attention to the serious air pollution problem. PM2.5 in the air pose a serious threat to people's health, which refers to the particles with diameters equal to or less than 2.5 microns. The higher the content in the air, the more serious the air pollution. The most common air filter products used in daily life are filter masks. Commonly used in the filter masks are ordinary gauze, non-woven and other filter material. With the crude fiber and big pore between them, there’s a better filter effect for the large particles above PM10, however it is difficult to remove PM2.5 efficiently. Currently, many filter masks in the market have a lower filtering efficiency against PM2.5 and a poor permeability. Therefore, there is a urgent need to develop material and mask with high filtering efficiency and breathability to satisfy people’s needs in daily life and work.
Mr.Zhu says that the new filter paper is biocompatible, environmentally friendly, non-toxic, flexible. With the nano-porous structure and strong surface adsorption capacity, it can effectively intercept, adsorb and filter PM2.5. In order to improve the permeability of the new filter paper significantly, the hydroxyapatite super-long nanowire and plant fiber are combined together to form a multistage structure of composite pore, which has a better performance of high filtering efficiency and permeability. The filtering efficiency against PM2.5 and PM10 is more than 95%, which is better than other kinds of masks.
What’s more, he says, the filtering efficiency against PM2.5 is all above 95% whatever it is mild, moderate or severe pollution. Therefore the reusable filter paper will be used as the core material for the daily mask to protect against the hazy weather, which can be repeatedly used for a long time.
It is reported that the team has also developed a new type of filter paper with antibacterial function based on hydroxyapatite super-long nanowire, which has a high antibacterial activity against E. coli and staphylococcus aureus. Except for the highly effective antibacterial filter masks, the new filter paper is also expected to be used in air purifier and air conditioner.