[아시아경제 호남취재본부 이관우 기자] The Gwangju Institute of Science and Technology (GIST, GIST) announced on the 16th that the research team of Professor Jae-Seok Lee of the Department of Materials Science and Engineering has developed a polymer filter material that has permanent electrostatic power and an antimicrobial filter that is effective in reducing fine dust by attaching positive ions to the polymer.
Zwitterion is a molecule that has both positive and negative electrical characteristics in chemistry and is neutral, and electrostatic force is the attraction between particles generated by electric charges.
Filters used for general fine dust reduction masks make nonwoven fabrics by melt spinning polypropylene, and give electrostatic force thereto, but there is a disadvantage in that electrostatic force easily disappears due to moisture, alcohol, oil particles, and carbon particles.
Melt spinning is a process of extruding and cooling a polymer into fine pores to make nonwoven fibers in the shape of elongated threads.
The functional polymer material developed in this study has the advantage that positive ions with high dipole moment, which is a measure of the polarity of a material composed of electric charges in physics, are attached to the polymer, so that it can permanently maintain electrostatic force.
Furthermore, due to the nature of the polymer, it is possible to design various chemical structures, so it can be used not only for indoor fine dust, but also for the development of functional filter materials tailored to the environment in which volatile organic substances or viruses exist in the long term.
In this study, a nanofiber fabric was manufactured by controlling the diameter of the nanofiber to a level of several hundred nanometers through electrospinning of a polymer into which a positive ion was introduced. The nanofiber fabric thus developed showed excellent antibacterial properties (99.90%) and high filter performance (98.5%/5.8 mmH2O).
Professor Lee Jae-seok said, “We have developed a new filter with permanent electrostatic and antibacterial properties that can be used in daily masks to prevent the spread of Corona 19 and reduce fine dust. In addition, it is expected that it can be used to make masks with strong antibacterial properties.”
Reporter Lee Kwan-woo, Honam Coverage Headquarters [email protected]
Source: 아시아경제신문 실시간 속보 by www.asiae.co.kr.
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