Contributions of impregnated silver nanoparticles to ideality increase of filtration material in human respiratory protection

Abstract

A technical contradiction arises when within a system one parameter improves thus automatically causing another one to worsen. In a situation like this, instead of a usual acceptance of compromise which leads to optimization of a solution for a newly founded problem, in inventology we implement the process of idealisation. The experimental part of this study comprises comparative examination of NaCl aerosol leakage, as a simulator of biological agents, into the epidemiological anti-microbe masks EM1 and EM2, with the aim of determining physiological suitability of EM1 and EM2 and the resistance that arises when inhaling NaCl aerosol was measured at the flows of 95dm 3 /min. It was experimentally proved that impregnation of silver nanoparticles onto the inner filtrating layer of EM2 contributes to the increase of its efficiency, and mathematical modelling helped calculate the realistic increase of this means.

LT - contradiction matrix

“…They consist of three layers made of non-woven textile or polypropylene and one filter layer, which is impregnated with silver nano-particles, and they are disposable. In the test of NEM samples, the method for testing with NaCl was defined in the standard [27,28]. This method is based on the principle of leakage of NaCl aerosol through a filtering medium, whereby the concentration of this aerosol is measured before and after the test sample by the flame photometry method.…”

“…Also, small amounts of admixtures are added to the fiberglass to improve the characteristics of the filter material, such as resistance to mold, water, stretching, etc. Thus, TiO 2 or Ag nanoparticles can be deposited on textile, woolen or other substrates which prevent the penetration of the largest particles from the air, but at the same time exhibit antibacterial and antiviral capacity [28]. Volatile Organic Compounds (VOC) filters are used to prevent the penetration of easily volatile compounds that can be found in the air.…”

Mathematical-physical model of solving inventive problems

“…Calculating the ideality of ES, i.e. the obtained HDIS of the inventive problem is performed according to the procedure given in the literature [20][21][22].…”

Compatibility between TRIZ contradiction matrix and LT-units system

“…In order to overcome a TC in most other methodologies, system optimization is performed. However, TRIZ strives to overcome every problem by achieving the Ideal Final Solution (IFS) [3][4][5]. In case of applying the Contradiction Matrix, by intersecting the parameters that are being improved with those that deteriorate automatically, it is proposed in the cells of the matrix to use several different TRIZ principles out of a total of 40 defined, the application of which would most probability resolve the TC.…”